mozilla-central/editor/libeditor/HTMLEditUtils.cpp (file symbol)

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "HTMLEditUtils.h"
#include "AutoRangeArray.h" // for AutoRangeArray
#include "CSSEditUtils.h" // for CSSEditUtils
#include "EditAction.h" // for EditAction
#include "EditorBase.h" // for EditorBase, EditorType
#include "EditorDOMPoint.h" // for EditorDOMPoint, etc.
#include "EditorForwards.h" // for CollectChildrenOptions
#include "EditorUtils.h" // for EditorUtils
#include "HTMLEditHelpers.h" // for EditorInlineStyle
#include "WSRunObject.h" // for WSRunScanner
#include "mozilla/ArrayUtils.h" // for ArrayLength
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc.
#include "mozilla/Attributes.h"
#include "mozilla/StaticPrefs_editor.h" // for StaticPrefs::editor_
#include "mozilla/RangeUtils.h" // for RangeUtils
#include "mozilla/dom/DocumentInlines.h" // for GetBodyElement()
#include "mozilla/dom/Element.h" // for Element, nsINode
#include "mozilla/dom/HTMLAnchorElement.h"
#include "mozilla/dom/HTMLBodyElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/ServoCSSParser.h" // for ServoCSSParser
#include "mozilla/dom/StaticRange.h"
#include "mozilla/dom/Text.h" // for Text
#include "nsAString.h" // for nsAString::IsEmpty
#include "nsAtom.h" // for nsAtom
#include "nsAttrValue.h" // nsAttrValue
#include "nsCaseTreatment.h"
#include "nsCOMPtr.h" // for nsCOMPtr, operator==, etc.
#include "nsComputedDOMStyle.h" // for nsComputedDOMStyle
#include "nsDebug.h" // for NS_ASSERTION, etc.
#include "nsElementTable.h" // for nsHTMLElement
#include "nsError.h" // for NS_SUCCEEDED
#include "nsGkAtoms.h" // for nsGkAtoms, nsGkAtoms::a, etc.
#include "nsHTMLTags.h"
#include "nsIFrameInlines.h" // for nsIFrame::IsFlexOrGridItem()
#include "nsLiteralString.h" // for NS_LITERAL_STRING
#include "nsNameSpaceManager.h" // for kNameSpaceID_None
#include "nsPrintfCString.h" // nsPringfCString
#include "nsString.h" // for nsAutoString
#include "nsStyledElement.h"
#include "nsStyleStruct.h" // for StyleDisplay
#include "nsStyleUtil.h" // for nsStyleUtil
#include "nsTextFragment.h" // for nsTextFragment
#include "nsTextFrame.h" // for nsTextFrame
namespace mozilla {
using namespace dom;
using EditorType = EditorBase::EditorType;
template nsIContent* HTMLEditUtils::GetPreviousContent(
const EditorDOMPoint& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetPreviousContent(
const EditorRawDOMPoint& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetPreviousContent(
const EditorDOMPointInText& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetPreviousContent(
const EditorRawDOMPointInText& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetNextContent(
const EditorDOMPoint& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetNextContent(
const EditorRawDOMPoint& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetNextContent(
const EditorDOMPointInText& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template nsIContent* HTMLEditUtils::GetNextContent(
const EditorRawDOMPointInText& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck, const Element* aAncestorLimiter);
template EditorDOMPoint HTMLEditUtils::GetPreviousEditablePoint(
nsIContent& aContent, const Element* aAncestorLimiter,
InvisibleWhiteSpaces aInvisibleWhiteSpaces,
TableBoundary aHowToTreatTableBoundary);
template EditorRawDOMPoint HTMLEditUtils::GetPreviousEditablePoint(
nsIContent& aContent, const Element* aAncestorLimiter,
InvisibleWhiteSpaces aInvisibleWhiteSpaces,
TableBoundary aHowToTreatTableBoundary);
template EditorDOMPoint HTMLEditUtils::GetNextEditablePoint(
nsIContent& aContent, const Element* aAncestorLimiter,
InvisibleWhiteSpaces aInvisibleWhiteSpaces,
TableBoundary aHowToTreatTableBoundary);
template EditorRawDOMPoint HTMLEditUtils::GetNextEditablePoint(
nsIContent& aContent, const Element* aAncestorLimiter,
InvisibleWhiteSpaces aInvisibleWhiteSpaces,
TableBoundary aHowToTreatTableBoundary);
template nsIContent* HTMLEditUtils::GetContentToPreserveInlineStyles(
const EditorDOMPoint& aPoint, const Element& aEditingHost);
template nsIContent* HTMLEditUtils::GetContentToPreserveInlineStyles(
const EditorRawDOMPoint& aPoint, const Element& aEditingHost);
template EditorDOMPoint HTMLEditUtils::GetBetterInsertionPointFor(
const nsIContent& aContentToInsert, const EditorDOMPoint& aPointToInsert,
const Element& aEditingHost);
template EditorRawDOMPoint HTMLEditUtils::GetBetterInsertionPointFor(
const nsIContent& aContentToInsert, const EditorRawDOMPoint& aPointToInsert,
const Element& aEditingHost);
template EditorDOMPoint HTMLEditUtils::GetBetterInsertionPointFor(
const nsIContent& aContentToInsert, const EditorRawDOMPoint& aPointToInsert,
const Element& aEditingHost);
template EditorRawDOMPoint HTMLEditUtils::GetBetterInsertionPointFor(
const nsIContent& aContentToInsert, const EditorDOMPoint& aPointToInsert,
const Element& aEditingHost);
template EditorDOMPoint HTMLEditUtils::GetBetterCaretPositionToInsertText(
const EditorDOMPoint& aPoint, const Element& aEditingHost);
template EditorDOMPoint HTMLEditUtils::GetBetterCaretPositionToInsertText(
const EditorRawDOMPoint& aPoint, const Element& aEditingHost);
template EditorRawDOMPoint HTMLEditUtils::GetBetterCaretPositionToInsertText(
const EditorDOMPoint& aPoint, const Element& aEditingHost);
template EditorRawDOMPoint HTMLEditUtils::GetBetterCaretPositionToInsertText(
const EditorRawDOMPoint& aPoint, const Element& aEditingHost);
template Result<EditorDOMPoint, nsresult>
HTMLEditUtils::ComputePointToPutCaretInElementIfOutside(
const Element& aElement, const EditorDOMPoint& aCurrentPoint);
template Result<EditorRawDOMPoint, nsresult>
HTMLEditUtils::ComputePointToPutCaretInElementIfOutside(
const Element& aElement, const EditorDOMPoint& aCurrentPoint);
template Result<EditorDOMPoint, nsresult>
HTMLEditUtils::ComputePointToPutCaretInElementIfOutside(
const Element& aElement, const EditorRawDOMPoint& aCurrentPoint);
template Result<EditorRawDOMPoint, nsresult>
HTMLEditUtils::ComputePointToPutCaretInElementIfOutside(
const Element& aElement, const EditorRawDOMPoint& aCurrentPoint);
template bool HTMLEditUtils::IsSameCSSColorValue(const nsAString& aColorA,
const nsAString& aColorB);
template bool HTMLEditUtils::IsSameCSSColorValue(const nsACString& aColorA,
const nsACString& aColorB);
bool HTMLEditUtils::CanContentsBeJoined(const nsIContent& aLeftContent,
const nsIContent& aRightContent) {
if (aLeftContent.NodeInfo()->NameAtom() !=
aRightContent.NodeInfo()->NameAtom()) {
return false;
}
if (!aLeftContent.IsElement()) {
return true; // can join text nodes, etc
}
MOZ_ASSERT(aRightContent.IsElement());
if (aLeftContent.NodeInfo()->NameAtom() == nsGkAtoms::font) {
const nsAttrValue* const leftSize =
aLeftContent.AsElement()->GetParsedAttr(nsGkAtoms::size);
const nsAttrValue* const rightSize =
aRightContent.AsElement()->GetParsedAttr(nsGkAtoms::size);
if (!leftSize ^ !rightSize || (leftSize && !leftSize->Equals(*rightSize))) {
return false;
}
const nsAttrValue* const leftColor =
aLeftContent.AsElement()->GetParsedAttr(nsGkAtoms::color);
const nsAttrValue* const rightColor =
aRightContent.AsElement()->GetParsedAttr(nsGkAtoms::color);
if (!leftColor ^ !rightColor ||
(leftColor && !leftColor->Equals(*rightColor))) {
return false;
}
const nsAttrValue* const leftFace =
aLeftContent.AsElement()->GetParsedAttr(nsGkAtoms::face);
const nsAttrValue* const rightFace =
aRightContent.AsElement()->GetParsedAttr(nsGkAtoms::face);
if (!leftFace ^ !rightFace || (leftFace && !leftFace->Equals(*rightFace))) {
return false;
}
}
nsStyledElement* leftStyledElement =
nsStyledElement::FromNode(const_cast<nsIContent*>(&aLeftContent));
if (!leftStyledElement) {
return false;
}
nsStyledElement* rightStyledElement =
nsStyledElement::FromNode(const_cast<nsIContent*>(&aRightContent));
if (!rightStyledElement) {
return false;
}
return CSSEditUtils::DoStyledElementsHaveSameStyle(*leftStyledElement,
*rightStyledElement);
}
static bool IsHTMLBlockElementByDefault(const nsIContent& aContent) {
if (!aContent.IsHTMLElement()) {
return false;
}
if (aContent.IsHTMLElement(nsGkAtoms::br)) { // shortcut for TextEditor
MOZ_ASSERT(!nsHTMLElement::IsBlock(
nsHTMLTags::CaseSensitiveAtomTagToId(nsGkAtoms::br)));
return false;
}
// We want to treat these as block nodes even though nsHTMLElement says
// they're not.
if (aContent.IsAnyOfHTMLElements(
nsGkAtoms::body, nsGkAtoms::head, nsGkAtoms::tbody, nsGkAtoms::thead,
nsGkAtoms::tfoot, nsGkAtoms::tr, nsGkAtoms::th, nsGkAtoms::td,
nsGkAtoms::dt, nsGkAtoms::dd)) {
return true;
}
return nsHTMLElement::IsBlock(
nsHTMLTags::CaseSensitiveAtomTagToId(aContent.NodeInfo()->NameAtom()));
}
bool HTMLEditUtils::IsBlockElement(const nsIContent& aContent,
BlockInlineCheck aBlockInlineCheck) {
MOZ_ASSERT(aBlockInlineCheck != BlockInlineCheck::Unused);
if (MOZ_UNLIKELY(!aContent.IsElement())) {
return false;
}
// If it's a <br>, we should always treat it as an inline element because
// its preceding collapse white-spaces and another <br> works same as usual
// even if you set its style to `display:block`.
if (aContent.IsHTMLElement(nsGkAtoms::br)) {
return false;
}
if (!StaticPrefs::editor_block_inline_check_use_computed_style() ||
aBlockInlineCheck == BlockInlineCheck::UseHTMLDefaultStyle) {
return IsHTMLBlockElementByDefault(aContent);
}
// Let's treat the document element and the body element is a block to avoid
// complicated things which may be detected by fuzzing.
if (aContent.OwnerDoc()->GetDocumentElement() == &aContent ||
(aContent.IsHTMLElement(nsGkAtoms::body) &&
aContent.OwnerDoc()->GetBodyElement() == &aContent)) {
return true;
}
RefPtr<const ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(aContent.AsElement());
if (MOZ_UNLIKELY(!elementStyle)) { // If aContent is not in the composed tree
return IsHTMLBlockElementByDefault(aContent);
}
const nsStyleDisplay* styleDisplay = elementStyle->StyleDisplay();
if (MOZ_UNLIKELY(styleDisplay->mDisplay == StyleDisplay::None)) {
// Typically, we should not keep handling editing in invisible nodes, but if
// we reach here, let's fallback to the default style for protecting the
// structure as far as possible.
return IsHTMLBlockElementByDefault(aContent);
}
// Both Blink and WebKit treat ruby style as a block, see IsEnclosingBlock()
// in Chromium or isBlock() in WebKit.
if (styleDisplay->IsRubyDisplayType()) {
return true;
}
// If the outside is not inline, treat it as block.
if (!styleDisplay->IsInlineOutsideStyle()) {
return true;
}
// If we're checking display-inside, inline-block, etc should be a block too.
return aBlockInlineCheck == BlockInlineCheck::UseComputedDisplayStyle &&
styleDisplay->DisplayInside() == StyleDisplayInside::FlowRoot &&
// Treat widgets as inline since they won't hide collapsible
// white-spaces around them.
styleDisplay->EffectiveAppearance() == StyleAppearance::None;
}
bool HTMLEditUtils::IsInlineContent(const nsIContent& aContent,
BlockInlineCheck aBlockInlineCheck) {
MOZ_ASSERT(aBlockInlineCheck != BlockInlineCheck::Unused);
if (!aContent.IsElement()) {
return true;
}
// If it's a <br>, we should always treat it as an inline element because
// its preceding collapse white-spaces and another <br> works same as usual
// even if you set its style to `display:block`.
if (aContent.IsHTMLElement(nsGkAtoms::br)) {
return true;
}
if (!StaticPrefs::editor_block_inline_check_use_computed_style() ||
aBlockInlineCheck == BlockInlineCheck::UseHTMLDefaultStyle) {
return !IsHTMLBlockElementByDefault(aContent);
}
// Let's treat the document element and the body element is a block to avoid
// complicated things which may be detected by fuzzing.
if (aContent.OwnerDoc()->GetDocumentElement() == &aContent ||
(aContent.IsHTMLElement(nsGkAtoms::body) &&
aContent.OwnerDoc()->GetBodyElement() == &aContent)) {
return false;
}
RefPtr<const ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(aContent.AsElement());
if (MOZ_UNLIKELY(!elementStyle)) { // If aContent is not in the composed tree
return !IsHTMLBlockElementByDefault(aContent);
}
const nsStyleDisplay* styleDisplay = elementStyle->StyleDisplay();
if (MOZ_UNLIKELY(styleDisplay->mDisplay == StyleDisplay::None)) {
// Similar to IsBlockElement, let's fallback to refer the default style.
// Note that if you change here, you may need to check the parent element
// style if aContent.
return !IsHTMLBlockElementByDefault(aContent);
}
// Different block IsBlockElement, when the display-outside is inline, it's
// simply an inline element.
return styleDisplay->IsInlineOutsideStyle() ||
styleDisplay->IsRubyDisplayType();
}
bool HTMLEditUtils::IsFlexOrGridItem(const Element& aElement) {
nsIFrame* frame = aElement.GetPrimaryFrame();
return frame && frame->IsFlexOrGridItem();
}
bool HTMLEditUtils::IsInclusiveAncestorCSSDisplayNone(
const nsIContent& aContent) {
if (NS_WARN_IF(!aContent.IsInComposedDoc())) {
return true;
}
for (const Element* element :
aContent.InclusiveFlatTreeAncestorsOfType<Element>()) {
RefPtr<const ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(element);
if (NS_WARN_IF(!elementStyle)) {
continue;
}
const nsStyleDisplay* styleDisplay = elementStyle->StyleDisplay();
if (MOZ_UNLIKELY(styleDisplay->mDisplay == StyleDisplay::None)) {
return true;
}
}
return false;
}
bool HTMLEditUtils::IsVisibleElementEvenIfLeafNode(const nsIContent& aContent) {
if (!aContent.IsElement()) {
return false;
}
// Assume non-HTML element is visible.
if (!aContent.IsHTMLElement()) {
return true;
}
// XXX Should we return false if the element is display:none?
if (HTMLEditUtils::IsBlockElement(
aContent, BlockInlineCheck::UseComputedDisplayStyle)) {
return true;
}
if (aContent.IsAnyOfHTMLElements(nsGkAtoms::applet, nsGkAtoms::iframe,
nsGkAtoms::img, nsGkAtoms::meter,
nsGkAtoms::progress, nsGkAtoms::select,
nsGkAtoms::textarea)) {
return true;
}
if (const HTMLInputElement* inputElement =
HTMLInputElement::FromNode(&aContent)) {
return inputElement->ControlType() != FormControlType::InputHidden;
}
// Maybe, empty inline element such as <span>.
return false;
}
/**
* IsInlineStyle() returns true if aNode is an inline style.
*/
bool HTMLEditUtils::IsInlineStyle(nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(
nsGkAtoms::b, nsGkAtoms::i, nsGkAtoms::u, nsGkAtoms::tt, nsGkAtoms::s,
nsGkAtoms::strike, nsGkAtoms::big, nsGkAtoms::small, nsGkAtoms::sub,
nsGkAtoms::sup, nsGkAtoms::font);
}
bool HTMLEditUtils::IsDisplayOutsideInline(const Element& aElement) {
RefPtr<const ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(&aElement);
if (!elementStyle) {
return false;
}
return elementStyle->StyleDisplay()->DisplayOutside() ==
StyleDisplayOutside::Inline;
}
bool HTMLEditUtils::IsDisplayInsideFlowRoot(const Element& aElement) {
RefPtr<const ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(&aElement);
if (!elementStyle) {
return false;
}
return elementStyle->StyleDisplay()->DisplayInside() ==
StyleDisplayInside::FlowRoot;
}
bool HTMLEditUtils::IsRemovableInlineStyleElement(Element& aElement) {
if (!aElement.IsHTMLElement()) {
return false;
}
if (aElement.IsAnyOfHTMLElements(
nsGkAtoms::abbr, // Chrome ignores, but does not make sense.
nsGkAtoms::acronym, nsGkAtoms::b,
nsGkAtoms::bdi, // Chrome ignores, but does not make sense.
nsGkAtoms::bdo, nsGkAtoms::big, nsGkAtoms::cite, nsGkAtoms::code,
// nsGkAtoms::del, Chrome ignores, but does not make sense but
// execCommand unofficial draft excludes this. Spec issue:
nsGkAtoms::dfn, nsGkAtoms::em, nsGkAtoms::font, nsGkAtoms::i,
nsGkAtoms::ins, nsGkAtoms::kbd,
nsGkAtoms::mark, // Chrome ignores, but does not make sense.
nsGkAtoms::nobr, nsGkAtoms::q, nsGkAtoms::s, nsGkAtoms::samp,
nsGkAtoms::small, nsGkAtoms::span, nsGkAtoms::strike,
nsGkAtoms::strong, nsGkAtoms::sub, nsGkAtoms::sup, nsGkAtoms::tt,
nsGkAtoms::u, nsGkAtoms::var)) {
return true;
}
// If it's a <blink> element, we can remove it.
nsAutoString tagName;
aElement.GetTagName(tagName);
return tagName.LowerCaseEqualsASCII("blink");
}
/**
* IsNodeThatCanOutdent() returns true if aNode is a list, list item or
* blockquote.
*/
bool HTMLEditUtils::IsNodeThatCanOutdent(nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(nsGkAtoms::ul, nsGkAtoms::ol, nsGkAtoms::dl,
nsGkAtoms::li, nsGkAtoms::dd, nsGkAtoms::dt,
nsGkAtoms::blockquote);
}
/**
* IsHeader() returns true if aNode is an html header.
*/
bool HTMLEditUtils::IsHeader(nsINode& aNode) {
return aNode.IsAnyOfHTMLElements(nsGkAtoms::h1, nsGkAtoms::h2, nsGkAtoms::h3,
nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6);
}
/**
* IsListItem() returns true if aNode is an html list item.
*/
bool HTMLEditUtils::IsListItem(const nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(nsGkAtoms::li, nsGkAtoms::dd,
nsGkAtoms::dt);
}
/**
* IsAnyTableElement() returns true if aNode is an html table, td, tr, ...
*/
bool HTMLEditUtils::IsAnyTableElement(const nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(
nsGkAtoms::table, nsGkAtoms::tr, nsGkAtoms::td, nsGkAtoms::th,
nsGkAtoms::thead, nsGkAtoms::tfoot, nsGkAtoms::tbody, nsGkAtoms::caption);
}
/**
* IsAnyTableElementButNotTable() returns true if aNode is an html td, tr, ...
* (doesn't include table)
*/
bool HTMLEditUtils::IsAnyTableElementButNotTable(nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(nsGkAtoms::tr, nsGkAtoms::td, nsGkAtoms::th,
nsGkAtoms::thead, nsGkAtoms::tfoot,
nsGkAtoms::tbody, nsGkAtoms::caption);
}
/**
* IsTable() returns true if aNode is an html table.
*/
bool HTMLEditUtils::IsTable(nsINode* aNode) {
return aNode && aNode->IsHTMLElement(nsGkAtoms::table);
}
/**
* IsTableRow() returns true if aNode is an html tr.
*/
bool HTMLEditUtils::IsTableRow(nsINode* aNode) {
return aNode && aNode->IsHTMLElement(nsGkAtoms::tr);
}
/**
* IsTableCell() returns true if aNode is an html td or th.
*/
bool HTMLEditUtils::IsTableCell(const nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th);
}
/**
* IsTableCellOrCaption() returns true if aNode is an html td or th or caption.
*/
bool HTMLEditUtils::IsTableCellOrCaption(nsINode& aNode) {
return aNode.IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th,
nsGkAtoms::caption);
}
/**
* IsAnyListElement() returns true if aNode is an html list.
*/
bool HTMLEditUtils::IsAnyListElement(const nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(nsGkAtoms::ul, nsGkAtoms::ol,
nsGkAtoms::dl);
}
/**
* IsPre() returns true if aNode is an html pre node.
*/
bool HTMLEditUtils::IsPre(const nsINode* aNode) {
return aNode && aNode->IsHTMLElement(nsGkAtoms::pre);
}
/**
* IsImage() returns true if aNode is an html image node.
*/
bool HTMLEditUtils::IsImage(nsINode* aNode) {
return aNode && aNode->IsHTMLElement(nsGkAtoms::img);
}
bool HTMLEditUtils::IsLink(const nsINode* aNode) {
MOZ_ASSERT(aNode);
if (!aNode->IsContent()) {
return false;
}
RefPtr<const dom::HTMLAnchorElement> anchor =
dom::HTMLAnchorElement::FromNodeOrNull(aNode->AsContent());
if (!anchor) {
return false;
}
nsAutoCString tmpText;
anchor->GetHref(tmpText);
return !tmpText.IsEmpty();
}
bool HTMLEditUtils::IsNamedAnchor(const nsINode* aNode) {
MOZ_ASSERT(aNode);
if (!aNode->IsHTMLElement(nsGkAtoms::a)) {
return false;
}
nsAutoString text;
return aNode->AsElement()->GetAttr(nsGkAtoms::name, text) && !text.IsEmpty();
}
/**
* IsMozDiv() returns true if aNode is an html div node with |type = _moz|.
*/
bool HTMLEditUtils::IsMozDiv(nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsHTMLElement(nsGkAtoms::div) &&
aNode->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
u"_moz"_ns, eIgnoreCase);
}
/**
* IsMailCite() returns true if aNode is an html blockquote with |type=cite|.
*/
bool HTMLEditUtils::IsMailCite(const Element& aElement) {
// don't ask me why, but our html mailcites are id'd by "type=cite"...
if (aElement.AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, u"cite"_ns,
eIgnoreCase)) {
return true;
}
// ... but our plaintext mailcites by "_moz_quote=true". go figure.
if (aElement.AttrValueIs(kNameSpaceID_None, nsGkAtoms::mozquote, u"true"_ns,
eIgnoreCase)) {
return true;
}
return false;
}
/**
* IsFormWidget() returns true if aNode is a form widget of some kind.
*/
bool HTMLEditUtils::IsFormWidget(const nsINode* aNode) {
MOZ_ASSERT(aNode);
return aNode->IsAnyOfHTMLElements(nsGkAtoms::textarea, nsGkAtoms::select,
nsGkAtoms::button, nsGkAtoms::output,
nsGkAtoms::progress, nsGkAtoms::meter,
nsGkAtoms::input);
}
bool HTMLEditUtils::SupportsAlignAttr(nsINode& aNode) {
return aNode.IsAnyOfHTMLElements(
nsGkAtoms::hr, nsGkAtoms::table, nsGkAtoms::tbody, nsGkAtoms::tfoot,
nsGkAtoms::thead, nsGkAtoms::tr, nsGkAtoms::td, nsGkAtoms::th,
nsGkAtoms::div, nsGkAtoms::p, nsGkAtoms::h1, nsGkAtoms::h2, nsGkAtoms::h3,
nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6);
}
bool HTMLEditUtils::IsVisibleTextNode(const Text& aText) {
if (!aText.TextDataLength()) {
return false;
}
Maybe<uint32_t> visibleCharOffset =
HTMLEditUtils::GetInclusiveNextNonCollapsibleCharOffset(
EditorDOMPointInText(&aText, 0));
if (visibleCharOffset.isSome()) {
return true;
}
// Now, all characters in aText is collapsible white-spaces. The node is
// invisible if next to block boundary.
return !HTMLEditUtils::GetElementOfImmediateBlockBoundary(
aText, WalkTreeDirection::Forward) &&
!HTMLEditUtils::GetElementOfImmediateBlockBoundary(
aText, WalkTreeDirection::Backward);
}
bool HTMLEditUtils::IsInVisibleTextFrames(nsPresContext* aPresContext,
const Text& aText) {
// TODO(dholbert): aPresContext is now unused; maybe we can remove it, here
// and in IsEmptyNode? We do use it as a signal (implicitly here,
// more-explicitly in IsEmptyNode) that we are in a "SafeToAskLayout" case...
// If/when we remove it, we should be sure we're not losing that signal of
// strictness, since this function here does absolutely need to query layout.
MOZ_ASSERT(aPresContext);
if (!aText.TextDataLength()) {
return false;
}
nsTextFrame* textFrame = do_QueryFrame(aText.GetPrimaryFrame());
if (!textFrame) {
return false;
}
return textFrame->HasVisibleText();
}
Element* HTMLEditUtils::GetElementOfImmediateBlockBoundary(
const nsIContent& aContent, const WalkTreeDirection aDirection) {
MOZ_ASSERT(aContent.IsHTMLElement(nsGkAtoms::br) || aContent.IsText());
// First, we get a block container. This is not designed for reaching
// no block boundaries in the tree.
Element* maybeNonEditableAncestorBlock = HTMLEditUtils::GetAncestorElement(
aContent, HTMLEditUtils::ClosestBlockElement,
BlockInlineCheck::UseComputedDisplayStyle);
if (NS_WARN_IF(!maybeNonEditableAncestorBlock)) {
return nullptr;
}
auto getNextContent = [&aDirection, &maybeNonEditableAncestorBlock](
const nsIContent& aContent) -> nsIContent* {
return aDirection == WalkTreeDirection::Forward
? HTMLEditUtils::GetNextContent(
aContent,
{WalkTreeOption::IgnoreDataNodeExceptText,
WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayStyle,
maybeNonEditableAncestorBlock)
: HTMLEditUtils::GetPreviousContent(
aContent,
{WalkTreeOption::IgnoreDataNodeExceptText,
WalkTreeOption::StopAtBlockBoundary},
BlockInlineCheck::UseComputedDisplayStyle,
maybeNonEditableAncestorBlock);
};
// Then, scan block element boundary while we don't see visible things.
const bool isBRElement = aContent.IsHTMLElement(nsGkAtoms::br);
for (nsIContent* nextContent = getNextContent(aContent); nextContent;
nextContent = getNextContent(*nextContent)) {
if (nextContent->IsElement()) {
// Break is right before a child block, it's not visible
if (HTMLEditUtils::IsBlockElement(
*nextContent, BlockInlineCheck::UseComputedDisplayStyle)) {
return nextContent->AsElement();
}
// XXX How about other non-HTML elements? Assume they are styled as
// blocks for now.
if (!nextContent->IsHTMLElement()) {
return nextContent->AsElement();
}
// If there is a visible content which generates something visible,
// stop scanning.
if (HTMLEditUtils::IsVisibleElementEvenIfLeafNode(*nextContent)) {
return nullptr;
}
if (nextContent->IsHTMLElement(nsGkAtoms::br)) {
// If aContent is a <br> element, another <br> element prevents the
// block boundary special handling.
if (isBRElement) {
return nullptr;
}
MOZ_ASSERT(aContent.IsText());
// Following <br> element always hides its following block boundary.
// I.e., white-spaces is at end of the text node is visible.
if (aDirection == WalkTreeDirection::Forward) {
return nullptr;
}
// Otherwise, if text node follows <br> element, its white-spaces at
// start of the text node are invisible. In this case, we return
// the found <br> element.
return nextContent->AsElement();
}
continue;
}
switch (nextContent->NodeType()) {
case nsINode::TEXT_NODE:
case nsINode::CDATA_SECTION_NODE:
break;
default:
continue;
}
Text* textNode = Text::FromNode(nextContent);
MOZ_ASSERT(textNode);
if (!textNode->TextLength()) {
continue; // empty invisible text node, keep scanning next one.
}
if (HTMLEditUtils::IsInclusiveAncestorCSSDisplayNone(*textNode)) {
continue; // Styled as invisible.
}
if (!textNode->TextIsOnlyWhitespace()) {
return nullptr; // found a visible text node.
}
const nsTextFragment& textFragment = textNode->TextFragment();
const bool isWhiteSpacePreformatted =
EditorUtils::IsWhiteSpacePreformatted(*textNode);
const bool isNewLinePreformatted =
EditorUtils::IsNewLinePreformatted(*textNode);
if (!isWhiteSpacePreformatted && !isNewLinePreformatted) {
// if the white-space only text node is not preformatted, ignore it.
continue;
}
for (uint32_t i = 0; i < textFragment.GetLength(); i++) {
if (textFragment.CharAt(i) == HTMLEditUtils::kNewLine) {
if (isNewLinePreformatted) {
return nullptr; // found a visible text node.
}
continue;
}
if (isWhiteSpacePreformatted) {
return nullptr; // found a visible text node.
}
}
// All white-spaces in the text node is invisible, keep scanning next one.
}
// There is no visible content and reached current block boundary. Then,
// the <br> element is the last content in the block and invisible.
// XXX Should we treat it visible if it's the only child of a block?
return maybeNonEditableAncestorBlock;
}
nsIContent* HTMLEditUtils::GetUnnecessaryLineBreakContent(
const Element& aBlockElement, ScanLineBreak aScanLineBreak) {
auto* lastLineBreakContent = [&]() -> nsIContent* {
const LeafNodeTypes leafNodeOrNonEditableNode{
LeafNodeType::LeafNodeOrNonEditableNode};
const WalkTreeOptions onlyPrecedingLine{
WalkTreeOption::StopAtBlockBoundary};
for (nsIContent* content =
aScanLineBreak == ScanLineBreak::AtEndOfBlock
? HTMLEditUtils::GetLastLeafContent(aBlockElement,
leafNodeOrNonEditableNode)
: HTMLEditUtils::GetPreviousContent(
aBlockElement, onlyPrecedingLine,
BlockInlineCheck::UseComputedDisplayStyle,
aBlockElement.GetParentElement());
content;
content =
aScanLineBreak == ScanLineBreak::AtEndOfBlock
? HTMLEditUtils::GetPreviousLeafContentOrPreviousBlockElement(
*content, aBlockElement, leafNodeOrNonEditableNode,
BlockInlineCheck::UseComputedDisplayStyle)
: HTMLEditUtils::GetPreviousContent(
*content, onlyPrecedingLine,
BlockInlineCheck::UseComputedDisplayStyle,
aBlockElement.GetParentElement())) {
// If we're scanning preceding <br> element of aBlockElement, we don't
// need to look for a line break in another block because the caller
// needs to handle only preceding <br> element of aBlockElement.
if (aScanLineBreak == ScanLineBreak::BeforeBlock &&
HTMLEditUtils::IsBlockElement(
*content, BlockInlineCheck::UseComputedDisplayStyle)) {
return nullptr;
}
if (Text* textNode = Text::FromNode(content)) {
if (!textNode->TextLength()) {
continue; // ignore empty text node
}
const nsTextFragment& textFragment = textNode->TextFragment();
if (EditorUtils::IsNewLinePreformatted(*textNode) &&
textFragment.CharAt(textFragment.GetLength() - 1u) ==
HTMLEditUtils::kNewLine) {
// If the text node ends with a preserved line break, it's unnecessary
// unless it follows another preformatted line break.
if (textFragment.GetLength() == 1u) {
return textNode; // Need to scan previous leaf.
}
return textFragment.CharAt(textFragment.GetLength() - 2u) ==
HTMLEditUtils::kNewLine
? nullptr
: textNode;
}
if (HTMLEditUtils::IsVisibleTextNode(*textNode)) {
return nullptr;
}
continue;
}
if (content->IsCharacterData()) {
continue; // ignore hidden character data nodes like comment
}
if (content->IsHTMLElement(nsGkAtoms::br)) {
return content;
}
// If found element is empty block or visible element, there is no
// unnecessary line break.
if (HTMLEditUtils::IsVisibleElementEvenIfLeafNode(*content)) {
return nullptr;
}
// Otherwise, e.g., empty <b>, we should keep scanning.
}
return nullptr;
}();
if (!lastLineBreakContent) {
return nullptr;
}
// If the found node is a text node and contains only one preformatted new
// line break, we need to keep scanning previous one, but if it has 2 or more
// characters, we know it has redundant line break.
Text* lastLineBreakText = Text::FromNode(lastLineBreakContent);
if (lastLineBreakText && lastLineBreakText->TextDataLength() != 1u) {
return lastLineBreakText;
}
// Scan previous leaf content, but now, we can stop at child block boundary.
const LeafNodeTypes leafNodeOrNonEditableNodeOrChildBlock{
LeafNodeType::LeafNodeOrNonEditableNode,
LeafNodeType::LeafNodeOrChildBlock};
const Element* blockElement = HTMLEditUtils::GetAncestorElement(
*lastLineBreakContent, HTMLEditUtils::ClosestBlockElement,
BlockInlineCheck::UseComputedDisplayStyle);
for (nsIContent* content =
HTMLEditUtils::GetPreviousLeafContentOrPreviousBlockElement(
*lastLineBreakContent, *blockElement,
leafNodeOrNonEditableNodeOrChildBlock,
BlockInlineCheck::UseComputedDisplayStyle);
content;
content = HTMLEditUtils::GetPreviousLeafContentOrPreviousBlockElement(
*content, *blockElement, leafNodeOrNonEditableNodeOrChildBlock,
BlockInlineCheck::UseComputedDisplayStyle)) {
if (HTMLEditUtils::IsBlockElement(
*content, BlockInlineCheck::UseComputedDisplayStyle) ||
(content->IsElement() && !content->IsHTMLElement())) {
// Now, must found <div>...<div>...</div><br></div>
// ^^^^
// In this case, the <br> element is necessary to make a following empty
// line of the inner <div> visible.
return nullptr;
}
if (Text* textNode = Text::FromNode(content)) {
if (!textNode->TextLength()) {
continue; // ignore empty text node
}
const nsTextFragment& textFragment = textNode->TextFragment();
if (EditorUtils::IsNewLinePreformatted(*textNode) &&
textFragment.CharAt(textFragment.GetLength() - 1u) ==
HTMLEditUtils::kNewLine) {
// So, we are here because the preformatted line break is followed by
// lastLineBreakContent which is <br> or a text node containing only
// one. In this case, even if their parents are different,
// lastLineBreakContent is necessary to make the last line visible.
return nullptr;
}
if (!HTMLEditUtils::IsVisibleTextNode(*textNode)) {
continue;
}
if (EditorUtils::IsWhiteSpacePreformatted(*textNode)) {
// If the white-space is preserved, neither following <br> nor a
// preformatted line break is not necessary.
return lastLineBreakContent;
}
// Otherwise, only if the last character is a collapsible white-space,
// we need lastLineBreakContent to make the trailing white-space visible.
switch (textFragment.CharAt(textFragment.GetLength() - 1u)) {
case HTMLEditUtils::kSpace:
case HTMLEditUtils::kCarriageReturn:
case HTMLEditUtils::kTab:
case HTMLEditUtils::kNBSP:
return nullptr;
default:
return lastLineBreakContent;
}
}
if (content->IsCharacterData()) {
continue; // ignore hidden character data nodes like comment
}
// If lastLineBreakContent follows a <br> element in same block, it's
// necessary to make the empty last line visible.
if (content->IsHTMLElement(nsGkAtoms::br)) {
return nullptr;
}
// If it follows a visible element, it's unnecessary line break.
if (HTMLEditUtils::IsVisibleElementEvenIfLeafNode(*content)) {
return lastLineBreakContent;
}
// Otherwise, ignore empty inline elements such as <b>.
}
// If the block is empty except invisible data nodes and lastLineBreakContent,
// lastLineBreakContent is necessary to make the block visible.
return nullptr;
}
bool HTMLEditUtils::IsEmptyNode(nsPresContext* aPresContext,
const nsINode& aNode,
const EmptyCheckOptions& aOptions /* = {} */,
bool* aSeenBR /* = nullptr */) {
MOZ_ASSERT_IF(aOptions.contains(EmptyCheckOption::SafeToAskLayout),
aPresContext);
if (aSeenBR) {
*aSeenBR = false;
}
if (const Text* text = Text::FromNode(&aNode)) {
return aOptions.contains(EmptyCheckOption::SafeToAskLayout)
? !IsInVisibleTextFrames(aPresContext, *text)
: !IsVisibleTextNode(*text);
}
if (!aNode.IsElement()) {
return false;
}
if (
// If it's not a container such as an <hr> or <br>, etc, it should be
// treated as not empty.
!IsContainerNode(*aNode.AsContent()) ||
// If it's a named anchor, we shouldn't treat it as empty because it
// has special meaning even if invisible.
IsNamedAnchor(&aNode) ||
// Form widgets should be treated as not empty because they have special
// meaning even if invisible.
IsFormWidget(&aNode)) {
return false;
}
const auto [isListItem, isTableCell, hasAppearance] =
[&]() MOZ_NEVER_INLINE_DEBUG -> std::tuple<bool, bool, bool> {
if (!StaticPrefs::editor_block_inline_check_use_computed_style()) {
return {IsListItem(&aNode), IsTableCell(&aNode), false};
}
// Let's stop treating the document element and the <body> as a list item
// nor a table cell to avoid tricky cases.
if (aNode.OwnerDoc()->GetDocumentElement() == &aNode ||
(aNode.IsHTMLElement(nsGkAtoms::body) &&
aNode.OwnerDoc()->GetBodyElement() == &aNode)) {
return {false, false, false};
}
RefPtr<const ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(aNode.AsElement());
// If there is no style information like in a document fragment, let's refer
// the default style.
if (MOZ_UNLIKELY(!elementStyle)) {
return {IsListItem(&aNode), IsTableCell(&aNode), false};
}
const nsStyleDisplay* styleDisplay = elementStyle->StyleDisplay();
if (NS_WARN_IF(!styleDisplay)) {
return {IsListItem(&aNode), IsTableCell(&aNode), false};
}
if (styleDisplay->mDisplay != StyleDisplay::None &&
styleDisplay->HasAppearance()) {
return {false, false, true};
}
if (styleDisplay->IsListItem()) {
return {true, false, false};
}
if (styleDisplay->mDisplay == StyleDisplay::TableCell) {
return {false, true, false};
}
// The default display of <dt> and <dd> is block. Therefore, we need
// special handling for them.
return {styleDisplay->mDisplay == StyleDisplay::Block &&
aNode.IsAnyOfHTMLElements(nsGkAtoms::dd, nsGkAtoms::dt),
false, false};
}();
// The web author created native widget without form control elements. Let's
// treat it as visible.
if (hasAppearance) {
return false;
}
if (isListItem &&
aOptions.contains(EmptyCheckOption::TreatListItemAsVisible)) {
return false;
}
if (isTableCell &&
aOptions.contains(EmptyCheckOption::TreatTableCellAsVisible)) {
return false;
}
bool seenBR = aSeenBR && *aSeenBR;
for (nsIContent* childContent = aNode.GetFirstChild(); childContent;
childContent = childContent->GetNextSibling()) {
// Is the child editable and non-empty? if so, return false
if (aOptions.contains(
EmptyCheckOption::TreatNonEditableContentAsInvisible) &&
!EditorUtils::IsEditableContent(*childContent, EditorType::HTML)) {
continue;
}
if (Text* text = Text::FromNode(childContent)) {
// break out if we find we aren't empty
if (aOptions.contains(EmptyCheckOption::SafeToAskLayout)
? IsInVisibleTextFrames(aPresContext, *text)
: IsVisibleTextNode(*text)) {
return false;
}
continue;
}
MOZ_ASSERT(childContent != &aNode);
if (!aOptions.contains(EmptyCheckOption::TreatSingleBRElementAsVisible) &&
!seenBR && childContent->IsHTMLElement(nsGkAtoms::br)) {
// Ignore first <br> element in it if caller wants so because it's
// typically a padding <br> element of for a parent block.
seenBR = true;
if (aSeenBR) {
*aSeenBR = true;
}
continue;
}
// Note: list items or table cells are not considered empty
// if they contain other lists or tables
EmptyCheckOptions options(aOptions);
if (childContent->IsElement() && (isListItem || isTableCell)) {
options += {EmptyCheckOption::TreatListItemAsVisible,
EmptyCheckOption::TreatTableCellAsVisible};
}
if (!IsEmptyNode(aPresContext, *childContent, options, &seenBR)) {
if (aSeenBR) {
*aSeenBR = seenBR;
}
return false;
}
}
if (aSeenBR) {
*aSeenBR = seenBR;
}
return true;
}
bool HTMLEditUtils::ShouldInsertLinefeedCharacter(
const EditorDOMPoint& aPointToInsert, const Element& aEditingHost) {
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
if (!aPointToInsert.IsInContentNode()) {
return false;
}
// closestEditableBlockElement can be nullptr if aEditingHost is an inline
// element.
Element* closestEditableBlockElement =
HTMLEditUtils::GetInclusiveAncestorElement(
*aPointToInsert.ContainerAs<nsIContent>(),
HTMLEditUtils::ClosestEditableBlockElement,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
// If and only if the nearest block is the editing host or its parent,
// and new line character is preformatted, we should insert a linefeed.
return (!closestEditableBlockElement ||
closestEditableBlockElement == &aEditingHost) &&
EditorUtils::IsNewLinePreformatted(
*aPointToInsert.ContainerAs<nsIContent>());
}
// We use bitmasks to test containment of elements. Elements are marked to be
// in certain groups by setting the mGroup member of the `ElementInfo` struct
// to the corresponding GROUP_ values (OR'ed together). Similarly, elements are
// marked to allow containment of certain groups by setting the
// mCanContainGroups member of the `ElementInfo` struct to the corresponding
// GROUP_ values (OR'ed together).
// Testing containment then simply consists of checking whether the
// mCanContainGroups bitmask of an element and the mGroup bitmask of a
// potential child overlap.
#define GROUP_NONE 0
// body, head, html
#define GROUP_TOPLEVEL (1 << 1)
// base, link, meta, script, style, title
#define GROUP_HEAD_CONTENT (1 << 2)
// b, big, i, s, small, strike, tt, u
#define GROUP_FONTSTYLE (1 << 3)
// abbr, acronym, cite, code, datalist, del, dfn, em, ins, kbd, mark, rb, rp
// rt, rtc, ruby, samp, strong, var
#define GROUP_PHRASE (1 << 4)
// a, applet, basefont, bdi, bdo, br, font, iframe, img, map, meter, object,
// output, picture, progress, q, script, span, sub, sup
#define GROUP_SPECIAL (1 << 5)
// button, form, input, label, select, textarea
#define GROUP_FORMCONTROL (1 << 6)
// address, applet, article, aside, blockquote, button, center, del, details,
// dialog, dir, div, dl, fieldset, figure, footer, form, h1, h2, h3, h4, h5,
// h6, header, hgroup, hr, iframe, ins, main, map, menu, nav, noframes,
// noscript, object, ol, p, pre, table, search, section, summary, ul
#define GROUP_BLOCK (1 << 7)
// frame, frameset
#define GROUP_FRAME (1 << 8)
// col, tbody
#define GROUP_TABLE_CONTENT (1 << 9)
// tr
#define GROUP_TBODY_CONTENT (1 << 10)
// td, th
#define GROUP_TR_CONTENT (1 << 11)
// col
#define GROUP_COLGROUP_CONTENT (1 << 12)
// param
#define GROUP_OBJECT_CONTENT (1 << 13)
// li
#define GROUP_LI (1 << 14)
// area
#define GROUP_MAP_CONTENT (1 << 15)
// optgroup, option
#define GROUP_SELECT_CONTENT (1 << 16)
// option
#define GROUP_OPTIONS (1 << 17)
// dd, dt
#define GROUP_DL_CONTENT (1 << 18)
// p
#define GROUP_P (1 << 19)
// text, white-space, newline, comment
#define GROUP_LEAF (1 << 20)
// XXX This is because the editor does sublists illegally.
// ol, ul
#define GROUP_OL_UL (1 << 21)
// h1, h2, h3, h4, h5, h6
#define GROUP_HEADING (1 << 22)
// figcaption
#define GROUP_FIGCAPTION (1 << 23)
// picture members (img, source)
#define GROUP_PICTURE_CONTENT (1 << 24)
#define GROUP_INLINE_ELEMENT \
(GROUP_FONTSTYLE | GROUP_PHRASE | GROUP_SPECIAL | GROUP_FORMCONTROL | \
GROUP_LEAF)
#define GROUP_FLOW_ELEMENT (GROUP_INLINE_ELEMENT | GROUP_BLOCK)
struct ElementInfo final {
#ifdef DEBUG
nsHTMLTag mTag;
#endif
// See `GROUP_NONE`'s comment.
uint32_t mGroup;
// See `GROUP_NONE`'s comment.
uint32_t mCanContainGroups;
bool mIsContainer;
bool mCanContainSelf;
};
#ifdef DEBUG
# define ELEM(_tag, _isContainer, _canContainSelf, _group, _canContainGroups) \
{ \
eHTMLTag_##_tag, _group, _canContainGroups, _isContainer, \
_canContainSelf \
}
#else
# define ELEM(_tag, _isContainer, _canContainSelf, _group, _canContainGroups) \
{ _group, _canContainGroups, _isContainer, _canContainSelf }
#endif
static const ElementInfo kElements[eHTMLTag_userdefined] = {
ELEM(a, true, false, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(abbr, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(acronym, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(address, true, true, GROUP_BLOCK, GROUP_INLINE_ELEMENT | GROUP_P),
// While applet is no longer a valid tag, removing it here breaks the editor
// (compiles, but causes many tests to fail in odd ways). This list is
// tracked against the main HTML Tag list, so any changes will require more
// than just removing entries.
ELEM(applet, true, true, GROUP_SPECIAL | GROUP_BLOCK,
GROUP_FLOW_ELEMENT | GROUP_OBJECT_CONTENT),
ELEM(area, false, false, GROUP_MAP_CONTENT, GROUP_NONE),
ELEM(article, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(aside, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(audio, false, false, GROUP_NONE, GROUP_NONE),
ELEM(b, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(base, false, false, GROUP_HEAD_CONTENT, GROUP_NONE),
ELEM(basefont, false, false, GROUP_SPECIAL, GROUP_NONE),
ELEM(bdi, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(bdo, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(bgsound, false, false, GROUP_NONE, GROUP_NONE),
ELEM(big, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(blockquote, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(body, true, true, GROUP_TOPLEVEL, GROUP_FLOW_ELEMENT),
ELEM(br, false, false, GROUP_SPECIAL, GROUP_NONE),
ELEM(button, true, true, GROUP_FORMCONTROL | GROUP_BLOCK,
GROUP_FLOW_ELEMENT),
ELEM(canvas, false, false, GROUP_NONE, GROUP_NONE),
ELEM(caption, true, true, GROUP_NONE, GROUP_INLINE_ELEMENT),
ELEM(center, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(cite, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(code, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(col, false, false, GROUP_TABLE_CONTENT | GROUP_COLGROUP_CONTENT,
GROUP_NONE),
ELEM(colgroup, true, false, GROUP_NONE, GROUP_COLGROUP_CONTENT),
ELEM(data, true, false, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(datalist, true, false, GROUP_PHRASE,
GROUP_OPTIONS | GROUP_INLINE_ELEMENT),
ELEM(dd, true, false, GROUP_DL_CONTENT, GROUP_FLOW_ELEMENT),
ELEM(del, true, true, GROUP_PHRASE | GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(details, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(dfn, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(dialog, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(dir, true, false, GROUP_BLOCK, GROUP_LI),
ELEM(div, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(dl, true, false, GROUP_BLOCK, GROUP_DL_CONTENT),
ELEM(dt, true, true, GROUP_DL_CONTENT, GROUP_INLINE_ELEMENT),
ELEM(em, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(embed, false, false, GROUP_NONE, GROUP_NONE),
ELEM(fieldset, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(figcaption, true, false, GROUP_FIGCAPTION, GROUP_FLOW_ELEMENT),
ELEM(figure, true, true, GROUP_BLOCK,
GROUP_FLOW_ELEMENT | GROUP_FIGCAPTION),
ELEM(font, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(footer, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(form, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(frame, false, false, GROUP_FRAME, GROUP_NONE),
ELEM(frameset, true, true, GROUP_FRAME, GROUP_FRAME),
ELEM(h1, true, false, GROUP_BLOCK | GROUP_HEADING, GROUP_INLINE_ELEMENT),
ELEM(h2, true, false, GROUP_BLOCK | GROUP_HEADING, GROUP_INLINE_ELEMENT),
ELEM(h3, true, false, GROUP_BLOCK | GROUP_HEADING, GROUP_INLINE_ELEMENT),
ELEM(h4, true, false, GROUP_BLOCK | GROUP_HEADING, GROUP_INLINE_ELEMENT),
ELEM(h5, true, false, GROUP_BLOCK | GROUP_HEADING, GROUP_INLINE_ELEMENT),
ELEM(h6, true, false, GROUP_BLOCK | GROUP_HEADING, GROUP_INLINE_ELEMENT),
ELEM(head, true, false, GROUP_TOPLEVEL, GROUP_HEAD_CONTENT),
ELEM(header, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(hgroup, true, false, GROUP_BLOCK, GROUP_HEADING),
ELEM(hr, false, false, GROUP_BLOCK, GROUP_NONE),
ELEM(html, true, false, GROUP_TOPLEVEL, GROUP_TOPLEVEL),
ELEM(i, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(iframe, true, true, GROUP_SPECIAL | GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(image, false, false, GROUP_NONE, GROUP_NONE),
ELEM(img, false, false, GROUP_SPECIAL | GROUP_PICTURE_CONTENT, GROUP_NONE),
ELEM(input, false, false, GROUP_FORMCONTROL, GROUP_NONE),
ELEM(ins, true, true, GROUP_PHRASE | GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(kbd, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(keygen, false, false, GROUP_NONE, GROUP_NONE),
ELEM(label, true, false, GROUP_FORMCONTROL, GROUP_INLINE_ELEMENT),
ELEM(legend, true, true, GROUP_NONE, GROUP_INLINE_ELEMENT),
ELEM(li, true, false, GROUP_LI, GROUP_FLOW_ELEMENT),
ELEM(link, false, false, GROUP_HEAD_CONTENT, GROUP_NONE),
ELEM(listing, true, true, GROUP_BLOCK, GROUP_INLINE_ELEMENT),
ELEM(main, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(map, true, true, GROUP_SPECIAL, GROUP_BLOCK | GROUP_MAP_CONTENT),
ELEM(mark, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(marquee, true, false, GROUP_NONE, GROUP_NONE),
ELEM(menu, true, true, GROUP_BLOCK, GROUP_LI | GROUP_FLOW_ELEMENT),
ELEM(meta, false, false, GROUP_HEAD_CONTENT, GROUP_NONE),
ELEM(meter, true, false, GROUP_SPECIAL, GROUP_FLOW_ELEMENT),
ELEM(multicol, false, false, GROUP_NONE, GROUP_NONE),
ELEM(nav, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(nobr, true, false, GROUP_NONE, GROUP_NONE),
ELEM(noembed, false, false, GROUP_NONE, GROUP_NONE),
ELEM(noframes, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(noscript, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(object, true, true, GROUP_SPECIAL | GROUP_BLOCK,
GROUP_FLOW_ELEMENT | GROUP_OBJECT_CONTENT),
// XXX Can contain self and ul because editor does sublists illegally.
ELEM(ol, true, true, GROUP_BLOCK | GROUP_OL_UL, GROUP_LI | GROUP_OL_UL),
ELEM(optgroup, true, false, GROUP_SELECT_CONTENT, GROUP_OPTIONS),
ELEM(option, true, false, GROUP_SELECT_CONTENT | GROUP_OPTIONS, GROUP_LEAF),
ELEM(output, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(p, true, false, GROUP_BLOCK | GROUP_P, GROUP_INLINE_ELEMENT),
ELEM(param, false, false, GROUP_OBJECT_CONTENT, GROUP_NONE),
ELEM(picture, true, false, GROUP_SPECIAL, GROUP_PICTURE_CONTENT),
ELEM(plaintext, false, false, GROUP_NONE, GROUP_NONE),
ELEM(pre, true, true, GROUP_BLOCK, GROUP_INLINE_ELEMENT),
ELEM(progress, true, false, GROUP_SPECIAL, GROUP_FLOW_ELEMENT),
ELEM(q, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(rb, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(rp, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(rt, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(rtc, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(ruby, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(s, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(samp, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(script, true, false, GROUP_HEAD_CONTENT | GROUP_SPECIAL, GROUP_LEAF),
ELEM(search, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(section, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(select, true, false, GROUP_FORMCONTROL, GROUP_SELECT_CONTENT),
ELEM(small, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(slot, true, false, GROUP_NONE, GROUP_FLOW_ELEMENT),
ELEM(source, false, false, GROUP_PICTURE_CONTENT, GROUP_NONE),
ELEM(span, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(strike, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(strong, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(style, true, false, GROUP_HEAD_CONTENT, GROUP_LEAF),
ELEM(sub, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(summary, true, true, GROUP_BLOCK, GROUP_FLOW_ELEMENT),
ELEM(sup, true, true, GROUP_SPECIAL, GROUP_INLINE_ELEMENT),
ELEM(table, true, false, GROUP_BLOCK, GROUP_TABLE_CONTENT),
ELEM(tbody, true, false, GROUP_TABLE_CONTENT, GROUP_TBODY_CONTENT),
ELEM(td, true, false, GROUP_TR_CONTENT, GROUP_FLOW_ELEMENT),
ELEM(textarea, true, false, GROUP_FORMCONTROL, GROUP_LEAF),
ELEM(tfoot, true, false, GROUP_NONE, GROUP_TBODY_CONTENT),
ELEM(th, true, false, GROUP_TR_CONTENT, GROUP_FLOW_ELEMENT),
ELEM(thead, true, false, GROUP_NONE, GROUP_TBODY_CONTENT),
ELEM(template, false, false, GROUP_NONE, GROUP_NONE),
ELEM(time, true, false, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(title, true, false, GROUP_HEAD_CONTENT, GROUP_LEAF),
ELEM(tr, true, false, GROUP_TBODY_CONTENT, GROUP_TR_CONTENT),
ELEM(track, false, false, GROUP_NONE, GROUP_NONE),
ELEM(tt, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
ELEM(u, true, true, GROUP_FONTSTYLE, GROUP_INLINE_ELEMENT),
// XXX Can contain self and ol because editor does sublists illegally.
ELEM(ul, true, true, GROUP_BLOCK | GROUP_OL_UL, GROUP_LI | GROUP_OL_UL),
ELEM(var, true, true, GROUP_PHRASE, GROUP_INLINE_ELEMENT),
ELEM(video, false, false, GROUP_NONE, GROUP_NONE),
ELEM(wbr, false, false, GROUP_NONE, GROUP_NONE),
ELEM(xmp, true, false, GROUP_BLOCK, GROUP_NONE),
// These aren't elements.
ELEM(text, false, false, GROUP_LEAF, GROUP_NONE),
ELEM(whitespace, false, false, GROUP_LEAF, GROUP_NONE),
ELEM(newline, false, false, GROUP_LEAF, GROUP_NONE),
ELEM(comment, false, false, GROUP_LEAF, GROUP_NONE),
ELEM(entity, false, false, GROUP_NONE, GROUP_NONE),
ELEM(doctypeDecl, false, false, GROUP_NONE, GROUP_NONE),
ELEM(markupDecl, false, false, GROUP_NONE, GROUP_NONE),
ELEM(instruction, false, false, GROUP_NONE, GROUP_NONE),
ELEM(userdefined, true, false, GROUP_NONE, GROUP_FLOW_ELEMENT)};
bool HTMLEditUtils::CanNodeContain(nsHTMLTag aParentTagId,
nsHTMLTag aChildTagId) {
NS_ASSERTION(
aParentTagId > eHTMLTag_unknown && aParentTagId <= eHTMLTag_userdefined,
"aParentTagId out of range!");
NS_ASSERTION(
aChildTagId > eHTMLTag_unknown && aChildTagId <= eHTMLTag_userdefined,
"aChildTagId out of range!");
#ifdef DEBUG
static bool checked = false;
if (!checked) {
checked = true;
int32_t i;
for (i = 1; i <= eHTMLTag_userdefined; ++i) {
NS_ASSERTION(kElements[i - 1].mTag == i,
"You need to update kElements (missing tags).");
}
}
#endif
// Special-case button.
if (aParentTagId == eHTMLTag_button) {
static const nsHTMLTag kButtonExcludeKids[] = {
eHTMLTag_a, eHTMLTag_fieldset, eHTMLTag_form, eHTMLTag_iframe,
eHTMLTag_input, eHTMLTag_select, eHTMLTag_textarea};
uint32_t j;
for (j = 0; j < ArrayLength(kButtonExcludeKids); ++j) {
if (kButtonExcludeKids[j] == aChildTagId) {
return false;
}
}
}
// Deprecated elements.
if (aChildTagId == eHTMLTag_bgsound) {
return false;
}
// Bug #67007, dont strip userdefined tags.
if (aChildTagId == eHTMLTag_userdefined) {
return true;
}
const ElementInfo& parent = kElements[aParentTagId - 1];
if (aParentTagId == aChildTagId) {
return parent.mCanContainSelf;
}
const ElementInfo& child = kElements[aChildTagId - 1];
return !!(parent.mCanContainGroups & child.mGroup);
}
bool HTMLEditUtils::ContentIsInert(const nsIContent& aContent) {
for (nsIContent* content :
aContent.InclusiveFlatTreeAncestorsOfType<nsIContent>()) {
if (nsIFrame* frame = content->GetPrimaryFrame()) {
return frame->StyleUI()->IsInert();
}
// If it doesn't have primary frame, we need to check its ancestors.
// This may occur if it's an invisible text node or element nodes whose
// display is an invisible value.
if (!content->IsElement()) {
continue;
}
if (content->AsElement()->State().HasState(dom::ElementState::INERT)) {
return true;
}
}
return false;
}
bool HTMLEditUtils::IsContainerNode(nsHTMLTag aTagId) {
NS_ASSERTION(aTagId > eHTMLTag_unknown && aTagId <= eHTMLTag_userdefined,
"aTagId out of range!");
return kElements[aTagId - 1].mIsContainer;
}
bool HTMLEditUtils::IsNonListSingleLineContainer(const nsINode& aNode) {
return aNode.IsAnyOfHTMLElements(
nsGkAtoms::address, nsGkAtoms::div, nsGkAtoms::h1, nsGkAtoms::h2,
nsGkAtoms::h3, nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6,
nsGkAtoms::listing, nsGkAtoms::p, nsGkAtoms::pre, nsGkAtoms::xmp);
}
bool HTMLEditUtils::IsSingleLineContainer(const nsINode& aNode) {
return IsNonListSingleLineContainer(aNode) ||
aNode.IsAnyOfHTMLElements(nsGkAtoms::li, nsGkAtoms::dt, nsGkAtoms::dd);
}
// static
template <typename PT, typename CT>
nsIContent* HTMLEditUtils::GetPreviousContent(
const EditorDOMPointBase<PT, CT>& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck,
const Element* aAncestorLimiter /* = nullptr */) {
MOZ_ASSERT(aPoint.IsSetAndValid());
NS_WARNING_ASSERTION(
!aPoint.IsInDataNode() || aPoint.IsInTextNode(),
"GetPreviousContent() doesn't assume that the start point is a "
"data node except text node");
// If we are at the beginning of the node, or it is a text node, then just
// look before it.
if (aPoint.IsStartOfContainer() || aPoint.IsInTextNode()) {
if (aOptions.contains(WalkTreeOption::StopAtBlockBoundary) &&
aPoint.IsInContentNode() &&
HTMLEditUtils::IsBlockElement(
*aPoint.template ContainerAs<nsIContent>(), aBlockInlineCheck)) {
// If we aren't allowed to cross blocks, don't look before this block.
return nullptr;
}
return HTMLEditUtils::GetPreviousContent(
*aPoint.GetContainer(), aOptions, aBlockInlineCheck, aAncestorLimiter);
}
// else look before the child at 'aOffset'
if (aPoint.GetChild()) {
return HTMLEditUtils::GetPreviousContent(
*aPoint.GetChild(), aOptions, aBlockInlineCheck, aAncestorLimiter);
}
// unless there isn't one, in which case we are at the end of the node
// and want the deep-right child.
nsIContent* lastLeafContent = HTMLEditUtils::GetLastLeafContent(
*aPoint.GetContainer(),
{aOptions.contains(WalkTreeOption::StopAtBlockBoundary)
? LeafNodeType::LeafNodeOrChildBlock
: LeafNodeType::OnlyLeafNode},
aBlockInlineCheck);
if (!lastLeafContent) {
return nullptr;
}
if (!HTMLEditUtils::IsContentIgnored(*lastLeafContent, aOptions)) {
return lastLeafContent;
}
// restart the search from the non-editable node we just found
return HTMLEditUtils::GetPreviousContent(*lastLeafContent, aOptions,
aBlockInlineCheck, aAncestorLimiter);
}
// static
template <typename PT, typename CT>
nsIContent* HTMLEditUtils::GetNextContent(
const EditorDOMPointBase<PT, CT>& aPoint, const WalkTreeOptions& aOptions,
BlockInlineCheck aBlockInlineCheck,
const Element* aAncestorLimiter /* = nullptr */) {
MOZ_ASSERT(aPoint.IsSetAndValid());
NS_WARNING_ASSERTION(
!aPoint.IsInDataNode() || aPoint.IsInTextNode(),
"GetNextContent() doesn't assume that the start point is a "
"data node except text node");
auto point = aPoint.template To<EditorRawDOMPoint>();
// if the container is a text node, use its location instead
if (point.IsInTextNode()) {
point.SetAfter(point.GetContainer());
if (NS_WARN_IF(!point.IsSet())) {
return nullptr;
}
}
if (point.GetChild()) {
if (aOptions.contains(WalkTreeOption::StopAtBlockBoundary) &&
HTMLEditUtils::IsBlockElement(*point.GetChild(), aBlockInlineCheck)) {
return point.GetChild();
}
nsIContent* firstLeafContent = HTMLEditUtils::GetFirstLeafContent(
*point.GetChild(),
{aOptions.contains(WalkTreeOption::StopAtBlockBoundary)
? LeafNodeType::LeafNodeOrChildBlock
: LeafNodeType::OnlyLeafNode},
aBlockInlineCheck);
if (!firstLeafContent) {
return point.GetChild();
}
// XXX Why do we need to do this check? The leaf node must be a descendant
// of `point.GetChild()`.
if (aAncestorLimiter &&
(firstLeafContent == aAncestorLimiter ||
!firstLeafContent->IsInclusiveDescendantOf(aAncestorLimiter))) {
return nullptr;
}
if (!HTMLEditUtils::IsContentIgnored(*firstLeafContent, aOptions)) {
return firstLeafContent;
}
// restart the search from the non-editable node we just found
return HTMLEditUtils::GetNextContent(*firstLeafContent, aOptions,
aBlockInlineCheck, aAncestorLimiter);
}
// unless there isn't one, in which case we are at the end of the node
// and want the next one.
if (aOptions.contains(WalkTreeOption::StopAtBlockBoundary) &&
point.IsInContentNode() &&
HTMLEditUtils::IsBlockElement(*point.template ContainerAs<nsIContent>(),
aBlockInlineCheck)) {
// don't cross out of parent block
return nullptr;
}
return HTMLEditUtils::GetNextContent(*point.GetContainer(), aOptions,
aBlockInlineCheck, aAncestorLimiter);
}
// static
nsIContent* HTMLEditUtils::GetAdjacentLeafContent(
const nsINode& aNode, WalkTreeDirection aWalkTreeDirection,
const WalkTreeOptions& aOptions, BlockInlineCheck aBlockInlineCheck,
const Element* aAncestorLimiter /* = nullptr */) {
// called only by GetPriorNode so we don't need to check params.
MOZ_ASSERT(&aNode != aAncestorLimiter);
MOZ_ASSERT_IF(aAncestorLimiter,
aAncestorLimiter->IsInclusiveDescendantOf(aAncestorLimiter));
const nsINode* node = &aNode;
for (;;) {
// if aNode has a sibling in the right direction, return
// that sibling's closest child (or itself if it has no children)
nsIContent* sibling = aWalkTreeDirection == WalkTreeDirection::Forward
? node->GetNextSibling()
: node->GetPreviousSibling();
if (sibling) {
// XXX If `sibling` belongs to siblings of inclusive ancestors of aNode,
// perhaps, we need to use
// IgnoreInsideBlockBoundary(aBlockInlineCheck) here.
if (aOptions.contains(WalkTreeOption::StopAtBlockBoundary) &&
HTMLEditUtils::IsBlockElement(*sibling, aBlockInlineCheck)) {
// don't look inside previous sibling, since it is a block
return sibling;
}
const LeafNodeTypes leafNodeTypes = {
aOptions.contains(WalkTreeOption::StopAtBlockBoundary)
? LeafNodeType::LeafNodeOrChildBlock
: LeafNodeType::OnlyLeafNode};
nsIContent* leafContent =
aWalkTreeDirection == WalkTreeDirection::Forward
? HTMLEditUtils::GetFirstLeafContent(*sibling, leafNodeTypes,
aBlockInlineCheck)
: HTMLEditUtils::GetLastLeafContent(*sibling, leafNodeTypes,
aBlockInlineCheck);
return leafContent ? leafContent : sibling;
}
nsIContent* parent = node->GetParent();
if (!parent) {
return nullptr;
}
if (parent == aAncestorLimiter ||
(aOptions.contains(WalkTreeOption::StopAtBlockBoundary) &&
HTMLEditUtils::IsBlockElement(*parent, aBlockInlineCheck))) {
return nullptr;
}
node = parent;
}
MOZ_ASSERT_UNREACHABLE("What part of for(;;) do you not understand?");
return nullptr;
}
// static
nsIContent* HTMLEditUtils::GetAdjacentContent(
const nsINode& aNode, WalkTreeDirection aWalkTreeDirection,
const WalkTreeOptions& aOptions, BlockInlineCheck aBlockInlineCheck,
const Element* aAncestorLimiter /* = nullptr */) {
if (&aNode == aAncestorLimiter) {
// Don't allow traversal above the root node! This helps
// prevent us from accidentally editing browser content
// when the editor is in a text widget.
return nullptr;
}
nsIContent* leafContent = HTMLEditUtils::GetAdjacentLeafContent(
aNode, aWalkTreeDirection, aOptions, aBlockInlineCheck, aAncestorLimiter);
if (!leafContent) {
return nullptr;
}
if (!HTMLEditUtils::IsContentIgnored(*leafContent, aOptions)) {
return leafContent;
}
return HTMLEditUtils::GetAdjacentContent(*leafContent, aWalkTreeDirection,
aOptions, aBlockInlineCheck,
aAncestorLimiter);
}
// static
template <typename EditorDOMPointType>
EditorDOMPointType HTMLEditUtils::GetPreviousEditablePoint(
nsIContent& aContent, const Element* aAncestorLimiter,
InvisibleWhiteSpaces aInvisibleWhiteSpaces,
TableBoundary aHowToTreatTableBoundary) {
MOZ_ASSERT(HTMLEditUtils::IsSimplyEditableNode(aContent));
NS_ASSERTION(!HTMLEditUtils::IsAnyTableElement(&aContent) ||
HTMLEditUtils::IsTableCellOrCaption(aContent),
"HTMLEditUtils::GetPreviousEditablePoint() may return a point "
"between table structure elements");
if (&aContent == aAncestorLimiter) {
return EditorDOMPointType();
}
// First, look for previous content.
nsIContent* previousContent = aContent.GetPreviousSibling();
if (!previousContent) {
if (!aContent.GetParentElement()) {
return EditorDOMPointType();
}
nsIContent* inclusiveAncestor = &aContent;
for (Element* parentElement : aContent.AncestorsOfType<Element>()) {
if (parentElement == aAncestorLimiter ||
!HTMLEditUtils::IsSimplyEditableNode(*parentElement) ||
!HTMLEditUtils::CanCrossContentBoundary(*parentElement,
aHowToTreatTableBoundary)) {
// If cannot cross the parent element boundary, return the point of
// last inclusive ancestor point.
return EditorDOMPointType(inclusiveAncestor);
}
// Start of the parent element is a next editable point if it's an
// element which is not a table structure element.
if (!HTMLEditUtils::IsAnyTableElement(parentElement) ||
HTMLEditUtils::IsTableCellOrCaption(*parentElement)) {
inclusiveAncestor = parentElement;
}
previousContent = parentElement->GetPreviousSibling();
if (!previousContent) {
continue; // Keep looking for previous sibling of an ancestor.
}
// XXX Should we ignore data node like CDATA, Comment, etc?
// If previous content is not editable, let's return the point after it.
if (!HTMLEditUtils::IsSimplyEditableNode(*previousContent)) {
return EditorDOMPointType::After(*previousContent);
}
// If cannot cross previous content boundary, return start of last
// inclusive ancestor.
if (!HTMLEditUtils::CanCrossContentBoundary(*previousContent,
aHowToTreatTableBoundary)) {
return inclusiveAncestor == &aContent
? EditorDOMPointType(inclusiveAncestor)
: EditorDOMPointType(inclusiveAncestor, 0);
}
break;
}
if (!previousContent) {
return EditorDOMPointType(inclusiveAncestor);
}
} else if (!HTMLEditUtils::IsSimplyEditableNode(*previousContent)) {
return EditorDOMPointType::After(*previousContent);
} else if (!HTMLEditUtils::CanCrossContentBoundary(
*previousContent, aHowToTreatTableBoundary)) {
return EditorDOMPointType(&aContent);
}
// Next, look for end of the previous content.
nsIContent* leafContent = previousContent;
if (previousContent->GetChildCount() &&
HTMLEditUtils::IsContainerNode(*previousContent)) {
for (nsIContent* maybeLeafContent = previousContent->GetLastChild();
maybeLeafContent;
maybeLeafContent = maybeLeafContent->GetLastChild()) {
// If it's not an editable content or cannot cross the boundary,
// return the point after the content. Note that in this case,
// the content must not be any table elements except `<table>`
// because we've climbed down the tree.
if (!HTMLEditUtils::IsSimplyEditableNode(*maybeLeafContent) ||
!HTMLEditUtils::CanCrossContentBoundary(*maybeLeafContent,
aHowToTreatTableBoundary)) {
return EditorDOMPointType::After(*maybeLeafContent);
}
leafContent = maybeLeafContent;
if (!HTMLEditUtils::IsContainerNode(*leafContent)) {
break;
}
}
}
if (leafContent->IsText()) {
Text* textNode = leafContent->AsText();
if (aInvisibleWhiteSpaces == InvisibleWhiteSpaces::Preserve) {
return EditorDOMPointType::AtEndOf(*textNode);
}
// There may be invisible trailing white-spaces which should be
// ignored. Let's scan its start.
return WSRunScanner::GetAfterLastVisiblePoint<EditorDOMPointType>(
*textNode, aAncestorLimiter);
}
// If it's a container element, return end of it. Otherwise, return
// the point after the non-container element.
return HTMLEditUtils::IsContainerNode(*leafContent)
? EditorDOMPointType::AtEndOf(*leafContent)
: EditorDOMPointType::After(*leafContent);
}
// static
template <typename EditorDOMPointType>
EditorDOMPointType HTMLEditUtils::GetNextEditablePoint(
nsIContent& aContent, const Element* aAncestorLimiter,
InvisibleWhiteSpaces aInvisibleWhiteSpaces,
TableBoundary aHowToTreatTableBoundary) {
MOZ_ASSERT(HTMLEditUtils::IsSimplyEditableNode(aContent));
NS_ASSERTION(!HTMLEditUtils::IsAnyTableElement(&aContent) ||
HTMLEditUtils::IsTableCellOrCaption(aContent),
"HTMLEditUtils::GetPreviousEditablePoint() may return a point "
"between table structure elements");
if (&aContent == aAncestorLimiter) {
return EditorDOMPointType();
}
// First, look for next content.
nsIContent* nextContent = aContent.GetNextSibling();
if (!nextContent) {
if (!aContent.GetParentElement()) {
return EditorDOMPointType();
}
nsIContent* inclusiveAncestor = &aContent;
for (Element* parentElement : aContent.AncestorsOfType<Element>()) {
if (parentElement == aAncestorLimiter ||
!HTMLEditUtils::IsSimplyEditableNode(*parentElement) ||
!HTMLEditUtils::CanCrossContentBoundary(*parentElement,
aHowToTreatTableBoundary)) {
// If cannot cross the parent element boundary, return the point of
// last inclusive ancestor point.
return EditorDOMPointType(inclusiveAncestor);
}
// End of the parent element is a next editable point if it's an
// element which is not a table structure element.
if (!HTMLEditUtils::IsAnyTableElement(parentElement) ||
HTMLEditUtils::IsTableCellOrCaption(*parentElement)) {
inclusiveAncestor = parentElement;
}
nextContent = parentElement->GetNextSibling();
if (!nextContent) {
continue; // Keep looking for next sibling of an ancestor.
}
// XXX Should we ignore data node like CDATA, Comment, etc?
// If next content is not editable, let's return the point after
// the last inclusive ancestor.
if (!HTMLEditUtils::IsSimplyEditableNode(*nextContent)) {
return EditorDOMPointType::After(*parentElement);
}
// If cannot cross next content boundary, return after the last
// inclusive ancestor.
if (!HTMLEditUtils::CanCrossContentBoundary(*nextContent,
aHowToTreatTableBoundary)) {
return EditorDOMPointType::After(*inclusiveAncestor);
}
break;
}
if (!nextContent) {
return EditorDOMPointType::After(*inclusiveAncestor);
}
} else if (!HTMLEditUtils::IsSimplyEditableNode(*nextContent)) {
return EditorDOMPointType::After(aContent);
} else if (!HTMLEditUtils::CanCrossContentBoundary(
*nextContent, aHowToTreatTableBoundary)) {
return EditorDOMPointType::After(aContent);
}
// Next, look for start of the next content.
nsIContent* leafContent = nextContent;
if (nextContent->GetChildCount() &&
HTMLEditUtils::IsContainerNode(*nextContent)) {
for (nsIContent* maybeLeafContent = nextContent->GetFirstChild();
maybeLeafContent;
maybeLeafContent = maybeLeafContent->GetFirstChild()) {
// If it's not an editable content or cannot cross the boundary,
// return the point at the content (i.e., start of its parent). Note
// that in this case, the content must not be any table elements except
// `<table>` because we've climbed down the tree.
if (!HTMLEditUtils::IsSimplyEditableNode(*maybeLeafContent) ||
!HTMLEditUtils::CanCrossContentBoundary(*maybeLeafContent,
aHowToTreatTableBoundary)) {
return EditorDOMPointType(maybeLeafContent);
}
leafContent = maybeLeafContent;
if (!HTMLEditUtils::IsContainerNode(*leafContent)) {
break;
}
}
}
if (leafContent->IsText()) {
Text* textNode = leafContent->AsText();
if (aInvisibleWhiteSpaces == InvisibleWhiteSpaces::Preserve) {
return EditorDOMPointType(textNode, 0);
}
// There may be invisible leading white-spaces which should be
// ignored. Let's scan its start.
return WSRunScanner::GetFirstVisiblePoint<EditorDOMPointType>(
*textNode, aAncestorLimiter);
}
// If it's a container element, return start of it. Otherwise, return
// the point at the non-container element (i.e., start of its parent).
return HTMLEditUtils::IsContainerNode(*leafContent)
? EditorDOMPointType(leafContent, 0)
: EditorDOMPointType(leafContent);
}
// static
Element* HTMLEditUtils::GetAncestorElement(
const nsIContent& aContent, const AncestorTypes& aAncestorTypes,
BlockInlineCheck aBlockInlineCheck,
const Element* aAncestorLimiter /* = nullptr */) {
MOZ_ASSERT(
aAncestorTypes.contains(AncestorType::ClosestBlockElement) ||
aAncestorTypes.contains(AncestorType::MostDistantInlineElementInBlock) ||
aAncestorTypes.contains(AncestorType::ButtonElement));
if (&aContent == aAncestorLimiter) {
return nullptr;
}
const Element* theBodyElement = aContent.OwnerDoc()->GetBody();
const Element* theDocumentElement = aContent.OwnerDoc()->GetDocumentElement();
Element* lastAncestorElement = nullptr;
const bool editableElementOnly =
aAncestorTypes.contains(AncestorType::EditableElement);
const bool lookingForClosestBlockElement =
aAncestorTypes.contains(AncestorType::ClosestBlockElement);
const bool lookingForMostDistantInlineElementInBlock =
aAncestorTypes.contains(AncestorType::MostDistantInlineElementInBlock);
const bool ignoreHRElement =
aAncestorTypes.contains(AncestorType::IgnoreHRElement);
const bool lookingForButtonElement =
aAncestorTypes.contains(AncestorType::ButtonElement);
auto IsSearchingElementType = [&](const nsIContent& aContent) -> bool {
if (!aContent.IsElement() ||
(ignoreHRElement && aContent.IsHTMLElement(nsGkAtoms::hr))) {
return false;
}
if (editableElementOnly &&
!EditorUtils::IsEditableContent(aContent, EditorType::HTML)) {
return false;
}
return (lookingForClosestBlockElement &&
HTMLEditUtils::IsBlockElement(aContent, aBlockInlineCheck)) ||
(lookingForMostDistantInlineElementInBlock &&
HTMLEditUtils::IsInlineContent(aContent, aBlockInlineCheck)) ||
(lookingForButtonElement &&
aContent.IsHTMLElement(nsGkAtoms::button));
};
for (Element* element : aContent.AncestorsOfType<Element>()) {
if (editableElementOnly &&
!EditorUtils::IsEditableContent(*element, EditorType::HTML)) {
return lastAncestorElement && IsSearchingElementType(*lastAncestorElement)
? lastAncestorElement // editing host (can be inline element)
: nullptr;
}
if (ignoreHRElement && element->IsHTMLElement(nsGkAtoms::hr)) {
if (element == aAncestorLimiter) {
break;
}
continue;
}
if (lookingForButtonElement && element->IsHTMLElement(nsGkAtoms::button)) {
return element; // closest button element
}
if (HTMLEditUtils::IsBlockElement(*element, aBlockInlineCheck)) {
if (lookingForClosestBlockElement) {
return element; // closest block element
}
MOZ_ASSERT_IF(lastAncestorElement,
HTMLEditUtils::IsInlineContent(*lastAncestorElement,
aBlockInlineCheck));
return lastAncestorElement; // the last inline element which we found
}
if (element == aAncestorLimiter || element == theBodyElement ||
element == theDocumentElement) {
break;
}
lastAncestorElement = element;
}
return lastAncestorElement && IsSearchingElementType(*lastAncestorElement)
? lastAncestorElement
: nullptr;
}
// static
Element* HTMLEditUtils::GetInclusiveAncestorElement(
const nsIContent& aContent, const AncestorTypes& aAncestorTypes,
BlockInlineCheck aBlockInlineCheck,
const Element* aAncestorLimiter /* = nullptr */) {
MOZ_ASSERT(
aAncestorTypes.contains(AncestorType::ClosestBlockElement) ||
aAncestorTypes.contains(AncestorType::MostDistantInlineElementInBlock) ||
aAncestorTypes.contains(AncestorType::ButtonElement));
const Element* theBodyElement = aContent.OwnerDoc()->GetBody();
const Element* theDocumentElement = aContent.OwnerDoc()->GetDocumentElement();
const bool editableElementOnly =
aAncestorTypes.contains(AncestorType::EditableElement);
const bool lookingForClosestBlockElement =
aAncestorTypes.contains(AncestorType::ClosestBlockElement);
const bool lookingForMostDistantInlineElementInBlock =
aAncestorTypes.contains(AncestorType::MostDistantInlineElementInBlock);
const bool lookingForButtonElement =
aAncestorTypes.contains(AncestorType::ButtonElement);
const bool ignoreHRElement =
aAncestorTypes.contains(AncestorType::IgnoreHRElement);
auto IsSearchingElementType = [&](const nsIContent& aContent) -> bool {
if (!aContent.IsElement() ||
(ignoreHRElement && aContent.IsHTMLElement(nsGkAtoms::hr))) {
return false;
}
if (editableElementOnly &&
!EditorUtils::IsEditableContent(aContent, EditorType::HTML)) {
return false;
}
return (lookingForClosestBlockElement &&
HTMLEditUtils::IsBlockElement(aContent, aBlockInlineCheck)) ||
(lookingForMostDistantInlineElementInBlock &&
HTMLEditUtils::IsInlineContent(aContent, aBlockInlineCheck)) ||
(lookingForButtonElement &&
aContent.IsHTMLElement(nsGkAtoms::button));
};
// If aContent is the body element or the document element, we shouldn't climb
// up to its parent.
if (editableElementOnly &&
(&aContent == theBodyElement || &aContent == theDocumentElement)) {
return IsSearchingElementType(aContent)
? const_cast<Element*>(aContent.AsElement())
: nullptr;
}
if (lookingForButtonElement && aContent.IsHTMLElement(nsGkAtoms::button)) {
return const_cast<Element*>(aContent.AsElement());
}
// If aContent is a block element, we don't need to climb up the tree.
// Consider the result right now.
if ((lookingForClosestBlockElement ||
lookingForMostDistantInlineElementInBlock) &&
HTMLEditUtils::IsBlockElement(aContent, aBlockInlineCheck) &&
!(ignoreHRElement && aContent.IsHTMLElement(nsGkAtoms::hr))) {
return IsSearchingElementType(aContent)
? const_cast<Element*>(aContent.AsElement())
: nullptr;
}
// If aContent is the last element to search range because of the parent
// element type, consider the result before calling GetAncestorElement()
// because it won't return aContent.
if (!aContent.GetParent() ||
(editableElementOnly && !EditorUtils::IsEditableContent(
*aContent.GetParent(), EditorType::HTML)) ||
(!lookingForClosestBlockElement &&
HTMLEditUtils::IsBlockElement(*aContent.GetParent(),
aBlockInlineCheck) &&
!(ignoreHRElement &&
aContent.GetParent()->IsHTMLElement(nsGkAtoms::hr)))) {
return IsSearchingElementType(aContent)
? const_cast<Element*>(aContent.AsElement())
: nullptr;
}
if (&aContent == aAncestorLimiter) {
return nullptr;
}
return HTMLEditUtils::GetAncestorElement(aContent, aAncestorTypes,
aBlockInlineCheck, aAncestorLimiter);
}
// static
Element* HTMLEditUtils::GetClosestAncestorAnyListElement(
const nsIContent& aContent) {
for (Element* element : aContent.AncestorsOfType<Element>()) {
if (HTMLEditUtils::IsAnyListElement(element)) {
return element;
}
}
return nullptr;
}
// static
Element* HTMLEditUtils::GetClosestInclusiveAncestorAnyListElement(
const nsIContent& aContent) {
for (Element* element : aContent.InclusiveAncestorsOfType<Element>()) {
if (HTMLEditUtils::IsAnyListElement(element)) {
return element;
}
}
return nullptr;
}
EditAction HTMLEditUtils::GetEditActionForInsert(const nsAtom& aTagName) {
// This method may be in a hot path. So, return only necessary
// EditAction::eInsert*Element.
if (&aTagName == nsGkAtoms::ul) {
// For InputEvent.inputType, "insertUnorderedList".
return EditAction::eInsertUnorderedListElement;
}
if (&aTagName == nsGkAtoms::ol) {
// For InputEvent.inputType, "insertOrderedList".
return EditAction::eInsertOrderedListElement;
}
if (&aTagName == nsGkAtoms::hr) {
// For InputEvent.inputType, "insertHorizontalRule".
return EditAction::eInsertHorizontalRuleElement;
}
return EditAction::eInsertNode;
}
EditAction HTMLEditUtils::GetEditActionForRemoveList(const nsAtom& aTagName) {
// This method may be in a hot path. So, return only necessary
// EditAction::eRemove*Element.
if (&aTagName == nsGkAtoms::ul) {
// For InputEvent.inputType, "insertUnorderedList".
return EditAction::eRemoveUnorderedListElement;
}
if (&aTagName == nsGkAtoms::ol) {
// For InputEvent.inputType, "insertOrderedList".
return EditAction::eRemoveOrderedListElement;
}
return EditAction::eRemoveListElement;
}
EditAction HTMLEditUtils::GetEditActionForInsert(const Element& aElement) {
return GetEditActionForInsert(*aElement.NodeInfo()->NameAtom());
}
EditAction HTMLEditUtils::GetEditActionForFormatText(const nsAtom& aProperty,
const nsAtom* aAttribute,
bool aToSetStyle) {
// This method may be in a hot path. So, return only necessary
// EditAction::eSet*Property or EditAction::eRemove*Property.
if (&aProperty == nsGkAtoms::b) {
return aToSetStyle ? EditAction::eSetFontWeightProperty
: EditAction::eRemoveFontWeightProperty;
}
if (&aProperty == nsGkAtoms::i) {
return aToSetStyle ? EditAction::eSetTextStyleProperty
: EditAction::eRemoveTextStyleProperty;
}
if (&aProperty == nsGkAtoms::u) {
return aToSetStyle ? EditAction::eSetTextDecorationPropertyUnderline
: EditAction::eRemoveTextDecorationPropertyUnderline;
}
if (&aProperty == nsGkAtoms::strike) {
return aToSetStyle ? EditAction::eSetTextDecorationPropertyLineThrough
: EditAction::eRemoveTextDecorationPropertyLineThrough;
}
if (&aProperty == nsGkAtoms::sup) {
return aToSetStyle ? EditAction::eSetVerticalAlignPropertySuper
: EditAction::eRemoveVerticalAlignPropertySuper;
}
if (&aProperty == nsGkAtoms::sub) {
return aToSetStyle ? EditAction::eSetVerticalAlignPropertySub
: EditAction::eRemoveVerticalAlignPropertySub;
}
if (&aProperty == nsGkAtoms::font) {
if (aAttribute == nsGkAtoms::face) {
return aToSetStyle ? EditAction::eSetFontFamilyProperty
: EditAction::eRemoveFontFamilyProperty;
}
if (aAttribute == nsGkAtoms::color) {
return aToSetStyle ? EditAction::eSetColorProperty
: EditAction::eRemoveColorProperty;
}
if (aAttribute == nsGkAtoms::bgcolor) {
return aToSetStyle ? EditAction::eSetBackgroundColorPropertyInline
: EditAction::eRemoveBackgroundColorPropertyInline;
}
}
return aToSetStyle ? EditAction::eSetInlineStyleProperty
: EditAction::eRemoveInlineStyleProperty;
}
EditAction HTMLEditUtils::GetEditActionForAlignment(
const nsAString& aAlignType) {
// This method may be in a hot path. So, return only necessary
// EditAction::eAlign*.
if (aAlignType.EqualsLiteral("left")) {
return EditAction::eAlignLeft;
}
if (aAlignType.EqualsLiteral("right")) {
return EditAction::eAlignRight;
}
if (aAlignType.EqualsLiteral("center")) {
return EditAction::eAlignCenter;
}
if (aAlignType.EqualsLiteral("justify")) {
return EditAction::eJustify;
}
return EditAction::eSetAlignment;
}
// static
template <typename EditorDOMPointType>
nsIContent* HTMLEditUtils::GetContentToPreserveInlineStyles(
const EditorDOMPointType& aPoint, const Element& aEditingHost) {
MOZ_ASSERT(aPoint.IsSetAndValid());
if (MOZ_UNLIKELY(!aPoint.IsInContentNode())) {
return nullptr;
}
// If it points middle of a text node, use it. Otherwise, scan next visible
// thing and use the style of following text node if there is.
if (aPoint.IsInTextNode() && !aPoint.IsEndOfContainer()) {
return aPoint.template ContainerAs<nsIContent>();
}
for (auto point = aPoint.template To<EditorRawDOMPoint>(); point.IsSet();) {
WSScanResult nextVisibleThing =
WSRunScanner::ScanNextVisibleNodeOrBlockBoundary(
&aEditingHost, point,
BlockInlineCheck::UseComputedDisplayOutsideStyle);
if (nextVisibleThing.InVisibleOrCollapsibleCharacters()) {
return nextVisibleThing.TextPtr();
}
// Ignore empty inline container elements because it's not visible for
// users so that using the style will appear suddenly from point of
// view of users.
if (nextVisibleThing.ReachedSpecialContent() &&
nextVisibleThing.IsContentEditable() &&
nextVisibleThing.GetContent()->IsElement() &&
!nextVisibleThing.GetContent()->HasChildNodes() &&
HTMLEditUtils::IsContainerNode(*nextVisibleThing.ElementPtr())) {
point.SetAfter(nextVisibleThing.ElementPtr());
continue;
}
// Otherwise, we should use style of the container of the start point.
break;
}
return aPoint.template ContainerAs<nsIContent>();
}
template <typename EditorDOMPointType, typename EditorDOMPointTypeInput>
EditorDOMPointType HTMLEditUtils::GetBetterInsertionPointFor(
const nsIContent& aContentToInsert,
const EditorDOMPointTypeInput& aPointToInsert,
const Element& aEditingHost) {
if (NS_WARN_IF(!aPointToInsert.IsSet())) {
return EditorDOMPointType();
}
auto pointToInsert =
aPointToInsert.template GetNonAnonymousSubtreePoint<EditorDOMPointType>();
if (MOZ_UNLIKELY(
NS_WARN_IF(!pointToInsert.IsSet()) ||
NS_WARN_IF(!pointToInsert.GetContainer()->IsInclusiveDescendantOf(
&aEditingHost)))) {
// Cannot insert aContentToInsert into this DOM tree.
return EditorDOMPointType();
}
// If the node to insert is not a block level element, we can insert it
// at any point.
if (!HTMLEditUtils::IsBlockElement(
aContentToInsert, BlockInlineCheck::UseComputedDisplayStyle)) {
return pointToInsert;
}
WSRunScanner wsScannerForPointToInsert(
const_cast<Element*>(&aEditingHost), pointToInsert,
BlockInlineCheck::UseComputedDisplayStyle);
// If the insertion position is after the last visible item in a line,
// i.e., the insertion position is just before a visible line break <br>,
// we want to skip to the position just after the line break (see bug 68767).
WSScanResult forwardScanFromPointToInsertResult =
wsScannerForPointToInsert.ScanNextVisibleNodeOrBlockBoundaryFrom(
pointToInsert);
// So, if the next visible node isn't a <br> element, we can insert the block
// level element to the point.
if (!forwardScanFromPointToInsertResult.GetContent() ||
!forwardScanFromPointToInsertResult.ReachedBRElement()) {
return pointToInsert;
}
// However, we must not skip next <br> element when the caret appears to be
// positioned at the beginning of a block, in that case skipping the <br>
// would not insert the <br> at the caret position, but after the current
// empty line.
WSScanResult backwardScanFromPointToInsertResult =
wsScannerForPointToInsert.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
pointToInsert);
// So, if there is no previous visible node,
// or, if both nodes of the insertion point is <br> elements,
// or, if the previous visible node is different block,
// we need to skip the following <br>. So, otherwise, we can insert the
// block at the insertion point.
if (!backwardScanFromPointToInsertResult.GetContent() ||
backwardScanFromPointToInsertResult.ReachedBRElement() ||
backwardScanFromPointToInsertResult.ReachedCurrentBlockBoundary()) {
return pointToInsert;
}
return forwardScanFromPointToInsertResult
.template PointAfterContent<EditorDOMPointType>();
}
// static
template <typename EditorDOMPointType, typename EditorDOMPointTypeInput>
EditorDOMPointType HTMLEditUtils::GetBetterCaretPositionToInsertText(
const EditorDOMPointTypeInput& aPoint, const Element& aEditingHost) {
MOZ_ASSERT(aPoint.IsSetAndValid());
MOZ_ASSERT(
aPoint.GetContainer()->IsInclusiveFlatTreeDescendantOf(&aEditingHost));
if (aPoint.IsInTextNode()) {
return aPoint.template To<EditorDOMPointType>();
}
if (!aPoint.IsEndOfContainer() && aPoint.GetChild() &&
aPoint.GetChild()->IsText()) {
return EditorDOMPointType(aPoint.GetChild(), 0u);
}
if (aPoint.IsEndOfContainer()) {
WSRunScanner scanner(&aEditingHost, aPoint,
BlockInlineCheck::UseComputedDisplayStyle);
WSScanResult previousThing =
scanner.ScanPreviousVisibleNodeOrBlockBoundaryFrom(aPoint);
if (previousThing.InVisibleOrCollapsibleCharacters()) {
return EditorDOMPointType::AtEndOf(*previousThing.TextPtr());
}
}
if (HTMLEditUtils::CanNodeContain(*aPoint.GetContainer(),
*nsGkAtoms::textTagName)) {
return aPoint.template To<EditorDOMPointType>();
}
if (MOZ_UNLIKELY(aPoint.GetContainer() == &aEditingHost ||
!aPoint.template GetContainerParentAs<nsIContent>() ||
!HTMLEditUtils::CanNodeContain(
*aPoint.template ContainerParentAs<nsIContent>(),
*nsGkAtoms::textTagName))) {
return EditorDOMPointType();
}
return aPoint.ParentPoint().template To<EditorDOMPointType>();
}
// static
template <typename EditorDOMPointType, typename EditorDOMPointTypeInput>
Result<EditorDOMPointType, nsresult>
HTMLEditUtils::ComputePointToPutCaretInElementIfOutside(
const Element& aElement, const EditorDOMPointTypeInput& aCurrentPoint) {
MOZ_ASSERT(aCurrentPoint.IsSet());
// FYI: This was moved from
// Use range boundaries and RangeUtils::CompareNodeToRange() to compare
// selection start to new block.
bool nodeBefore, nodeAfter;
nsresult rv = RangeUtils::CompareNodeToRangeBoundaries(
const_cast<Element*>(&aElement), aCurrentPoint.ToRawRangeBoundary(),
aCurrentPoint.ToRawRangeBoundary(), &nodeBefore, &nodeAfter);
if (NS_FAILED(rv)) {
NS_WARNING("RangeUtils::CompareNodeToRange() failed");
return Err(rv);
}
if (nodeBefore && nodeAfter) {
return EditorDOMPointType(); // aCurrentPoint is in aElement
}
if (nodeBefore) {
// selection is after block. put at end of block.
const nsIContent* lastEditableContent = HTMLEditUtils::GetLastChild(
aElement, {WalkTreeOption::IgnoreNonEditableNode});
if (!lastEditableContent) {
lastEditableContent = &aElement;
}
if (lastEditableContent->IsText() ||
HTMLEditUtils::IsContainerNode(*lastEditableContent)) {
return EditorDOMPointType::AtEndOf(*lastEditableContent);
}
MOZ_ASSERT(lastEditableContent->GetParentNode());
return EditorDOMPointType::After(*lastEditableContent);
}
// selection is before block. put at start of block.
const nsIContent* firstEditableContent = HTMLEditUtils::GetFirstChild(
aElement, {WalkTreeOption::IgnoreNonEditableNode});
if (!firstEditableContent) {
firstEditableContent = &aElement;
}
if (firstEditableContent->IsText() ||
HTMLEditUtils::IsContainerNode(*firstEditableContent)) {
MOZ_ASSERT(firstEditableContent->GetParentNode());
// XXX Shouldn't this be EditorDOMPointType(firstEditableContent, 0u)?
return EditorDOMPointType(firstEditableContent);
}
// XXX And shouldn't this be EditorDOMPointType(firstEditableContent)?
return EditorDOMPointType(firstEditableContent, 0u);
}
// static
bool HTMLEditUtils::IsInlineStyleSetByElement(
const nsIContent& aContent, const EditorInlineStyle& aStyle,
const nsAString* aValue, nsAString* aOutValue /* = nullptr */) {
for (Element* element : aContent.InclusiveAncestorsOfType<Element>()) {
if (aStyle.mHTMLProperty != element->NodeInfo()->NameAtom()) {
continue;
}
if (!aStyle.mAttribute) {
return true;
}
nsAutoString value;
element->GetAttr(aStyle.mAttribute, value);
if (aOutValue) {
*aOutValue = value;
}
if (!value.IsEmpty()) {
if (!aValue) {
return true;
}
if (aValue->Equals(value, nsCaseInsensitiveStringComparator)) {
return true;
}
// We found the prop with the attribute, but the value doesn't match.
return false;
}
}
return false;
}
// static
size_t HTMLEditUtils::CollectChildren(
const nsINode& aNode,
nsTArray<OwningNonNull<nsIContent>>& aOutArrayOfContents,
size_t aIndexToInsertChildren, const CollectChildrenOptions& aOptions) {
// FYI: This was moved from
size_t numberOfFoundChildren = 0;
for (nsIContent* content =
GetFirstChild(aNode, {WalkTreeOption::IgnoreNonEditableNode});
content; content = content->GetNextSibling()) {
if ((aOptions.contains(CollectChildrenOption::CollectListChildren) &&
(HTMLEditUtils::IsAnyListElement(content) ||
HTMLEditUtils::IsListItem(content))) ||
(aOptions.contains(CollectChildrenOption::CollectTableChildren) &&
HTMLEditUtils::IsAnyTableElement(content))) {
numberOfFoundChildren += HTMLEditUtils::CollectChildren(
*content, aOutArrayOfContents,
aIndexToInsertChildren + numberOfFoundChildren, aOptions);
continue;
}
if (aOptions.contains(CollectChildrenOption::IgnoreNonEditableChildren) &&
!EditorUtils::IsEditableContent(*content, EditorType::HTML)) {
continue;
}
if (aOptions.contains(CollectChildrenOption::IgnoreInvisibleTextNodes) &&
content->IsText() &&
!HTMLEditUtils::IsVisibleTextNode(*content->AsText())) {
continue;
}
aOutArrayOfContents.InsertElementAt(
aIndexToInsertChildren + numberOfFoundChildren++, *content);
}
return numberOfFoundChildren;
}
// static
size_t HTMLEditUtils::CollectEmptyInlineContainerDescendants(
const nsINode& aNode,
nsTArray<OwningNonNull<nsIContent>>& aOutArrayOfContents,
const EmptyCheckOptions& aOptions, BlockInlineCheck aBlockInlineCheck) {
size_t numberOfFoundElements = 0;
for (Element* element = aNode.GetFirstElementChild(); element;) {
if (HTMLEditUtils::IsEmptyInlineContainer(*element, aOptions,
aBlockInlineCheck)) {
aOutArrayOfContents.AppendElement(*element);
numberOfFoundElements++;
nsIContent* nextContent = element->GetNextNonChildNode(&aNode);
element = nullptr;
for (; nextContent; nextContent = nextContent->GetNextNode(&aNode)) {
if (nextContent->IsElement()) {
element = nextContent->AsElement();
break;
}
}
continue;
}
nsIContent* nextContent = element->GetNextNode(&aNode);
element = nullptr;
for (; nextContent; nextContent = nextContent->GetNextNode(&aNode)) {
if (nextContent->IsElement()) {
element = nextContent->AsElement();
break;
}
}
}
return numberOfFoundElements;
}
// static
bool HTMLEditUtils::ElementHasAttributeExcept(const Element& aElement,
const nsAtom& aAttribute1,
const nsAtom& aAttribute2,
const nsAtom& aAttribute3) {
// FYI: This was moved from
for (auto i : IntegerRange<uint32_t>(aElement.GetAttrCount())) {
const nsAttrName* name = aElement.GetAttrNameAt(i);
if (!name->NamespaceEquals(kNameSpaceID_None)) {
return true;
}
if (name->LocalName() == &aAttribute1 ||
name->LocalName() == &aAttribute2 ||
name->LocalName() == &aAttribute3) {
continue; // Ignore the given attribute
}
// Ignore empty style, class and id attributes because those attributes are
// not meaningful with empty value.
if (name->LocalName() == nsGkAtoms::style ||
name->LocalName() == nsGkAtoms::_class ||
name->LocalName() == nsGkAtoms::id) {
if (aElement.HasNonEmptyAttr(name->LocalName())) {
return true;
}
continue;
}
// Ignore special _moz attributes
nsAutoString attrString;
name->LocalName()->ToString(attrString);
if (!StringBeginsWith(attrString, u"_moz"_ns)) {
return true;
}
}
// if we made it through all of them without finding a real attribute
// other than aAttribute, then return true
return false;
}
bool HTMLEditUtils::GetNormalizedHTMLColorValue(const nsAString& aColorValue,
nsAString& aNormalizedValue) {
nsAttrValue value;
if (!value.ParseColor(aColorValue)) {
aNormalizedValue = aColorValue;
return false;
}
nscolor color = NS_RGB(0, 0, 0);
MOZ_ALWAYS_TRUE(value.GetColorValue(color));
aNormalizedValue = NS_ConvertASCIItoUTF16(nsPrintfCString(
"#%02x%02x%02x", NS_GET_R(color), NS_GET_G(color), NS_GET_B(color)));
return true;
}
bool HTMLEditUtils::IsSameHTMLColorValue(
const nsAString& aColorA, const nsAString& aColorB,
TransparentKeyword aTransparentKeyword) {
if (aTransparentKeyword == TransparentKeyword::Allowed) {
const bool isATransparent = aColorA.LowerCaseEqualsLiteral("transparent");
const bool isBTransparent = aColorB.LowerCaseEqualsLiteral("transparent");
if (isATransparent || isBTransparent) {
return isATransparent && isBTransparent;
}
}
nsAttrValue valueA, valueB;
if (!valueA.ParseColor(aColorA) || !valueB.ParseColor(aColorB)) {
return false;
}
nscolor colorA = NS_RGB(0, 0, 0), colorB = NS_RGB(0, 0, 0);
MOZ_ALWAYS_TRUE(valueA.GetColorValue(colorA));
MOZ_ALWAYS_TRUE(valueB.GetColorValue(colorB));
return colorA == colorB;
}
bool HTMLEditUtils::MaybeCSSSpecificColorValue(const nsAString& aColorValue) {
if (aColorValue.IsEmpty() || aColorValue.First() == '#') {
return false; // Quick return for the most cases.
}
nsAutoString colorValue(aColorValue);
colorValue.CompressWhitespace(true, true);
if (colorValue.LowerCaseEqualsASCII("transparent")) {
return true;
}
nscolor color = NS_RGB(0, 0, 0);
if (colorValue.IsEmpty() || colorValue.First() == '#') {
return false;
}
const NS_ConvertUTF16toUTF8 colorU8(colorValue);
if (Servo_ColorNameToRgb(&colorU8, &color)) {
return false;
}
if (colorValue.LowerCaseEqualsASCII("initial") ||
colorValue.LowerCaseEqualsASCII("inherit") ||
colorValue.LowerCaseEqualsASCII("unset") ||
colorValue.LowerCaseEqualsASCII("revert") ||
colorValue.LowerCaseEqualsASCII("currentcolor")) {
return true;
}
return ServoCSSParser::IsValidCSSColor(colorU8);
}
static bool ComputeColor(const nsAString& aColorValue, nscolor* aColor,
bool* aIsCurrentColor) {
return ServoCSSParser::ComputeColor(nullptr, NS_RGB(0, 0, 0),
NS_ConvertUTF16toUTF8(aColorValue),
aColor, aIsCurrentColor);
}
static bool ComputeColor(const nsACString& aColorValue, nscolor* aColor,
bool* aIsCurrentColor) {
return ServoCSSParser::ComputeColor(nullptr, NS_RGB(0, 0, 0), aColorValue,
aColor, aIsCurrentColor);
}
bool HTMLEditUtils::CanConvertToHTMLColorValue(const nsAString& aColorValue) {
bool isCurrentColor = false;
nscolor color = NS_RGB(0, 0, 0);
return ComputeColor(aColorValue, &color, &isCurrentColor) &&
!isCurrentColor && NS_GET_A(color) == 0xFF;
}
bool HTMLEditUtils::ConvertToNormalizedHTMLColorValue(
const nsAString& aColorValue, nsAString& aNormalizedValue) {
bool isCurrentColor = false;
nscolor color = NS_RGB(0, 0, 0);
if (!ComputeColor(aColorValue, &color, &isCurrentColor) || isCurrentColor ||
NS_GET_A(color) != 0xFF) {
aNormalizedValue = aColorValue;
return false;
}
aNormalizedValue.Truncate();
aNormalizedValue.AppendPrintf("#%02x%02x%02x", NS_GET_R(color),
NS_GET_G(color), NS_GET_B(color));
return true;
}
bool HTMLEditUtils::GetNormalizedCSSColorValue(const nsAString& aColorValue,
ZeroAlphaColor aZeroAlphaColor,
nsAString& aNormalizedValue) {
bool isCurrentColor = false;
nscolor color = NS_RGB(0, 0, 0);
if (!ComputeColor(aColorValue, &color, &isCurrentColor)) {
aNormalizedValue = aColorValue;
return false;
}
// If it's currentcolor, let's return it as-is since we cannot resolve it
// without ancestors.
if (isCurrentColor) {
aNormalizedValue = aColorValue;
return true;
}
if (aZeroAlphaColor == ZeroAlphaColor::TransparentKeyword &&
NS_GET_A(color) == 0) {
aNormalizedValue.AssignLiteral("transparent");
return true;
}
// Get serialized color value (i.e., "rgb()" or "rgba()").
aNormalizedValue.Truncate();
nsStyleUtil::GetSerializedColorValue(color, aNormalizedValue);
return true;
}
template <typename CharType>
bool HTMLEditUtils::IsSameCSSColorValue(const nsTSubstring<CharType>& aColorA,
const nsTSubstring<CharType>& aColorB) {
bool isACurrentColor = false;
nscolor colorA = NS_RGB(0, 0, 0);
if (!ComputeColor(aColorA, &colorA, &isACurrentColor)) {
return false;
}
bool isBCurrentColor = false;
nscolor colorB = NS_RGB(0, 0, 0);
if (!ComputeColor(aColorB, &colorB, &isBCurrentColor)) {
return false;
}
if (isACurrentColor || isBCurrentColor) {
return isACurrentColor && isBCurrentColor;
}
return colorA == colorB;
}
/******************************************************************************
* SelectedTableCellScanner
******************************************************************************/
SelectedTableCellScanner::SelectedTableCellScanner(
const AutoRangeArray& aRanges) {
if (aRanges.Ranges().IsEmpty()) {
return;
}
Element* firstSelectedCellElement =
HTMLEditUtils::GetTableCellElementIfOnlyOneSelected(
aRanges.FirstRangeRef());
if (!firstSelectedCellElement) {
return; // We're not in table cell selection mode.
}
mSelectedCellElements.SetCapacity(aRanges.Ranges().Length());
mSelectedCellElements.AppendElement(*firstSelectedCellElement);
for (uint32_t i = 1; i < aRanges.Ranges().Length(); i++) {
nsRange* range = aRanges.Ranges()[i];
if (NS_WARN_IF(!range) || NS_WARN_IF(!range->IsPositioned())) {
continue; // Shouldn't occur in normal conditions.
}
// Just ignore selection ranges which do not select only one table
// cell element. This is possible case if web apps sets multiple
// selections and first range selects a table cell element.
if (Element* selectedCellElement =
HTMLEditUtils::GetTableCellElementIfOnlyOneSelected(*range)) {
mSelectedCellElements.AppendElement(*selectedCellElement);
}
}
}
} // namespace mozilla