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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
#include "nsGfxButtonControlFrame.h"
#include "nsIFormControl.h"
#include "nsGkAtoms.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "nsContentUtils.h"
#include "nsTextNode.h"
using namespace mozilla;
nsGfxButtonControlFrame::nsGfxButtonControlFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsHTMLButtonControlFrame(aStyle, aPresContext, kClassID) {}
nsContainerFrame* NS_NewGfxButtonControlFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell)
nsGfxButtonControlFrame(aStyle, aPresShell->GetPresContext());
void nsGfxButtonControlFrame::Destroy(DestroyContext& aContext) {
nsresult nsGfxButtonControlFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(u"ButtonControl"_ns, aResult);
// Create the text content used as label for the button.
// The frame will be generated by the frame constructor.
nsresult nsGfxButtonControlFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
nsAutoString label;
nsresult rv = GetLabel(label);
// Add a child text content node for the label
mTextContent = new (mContent->NodeInfo()->NodeInfoManager())
// set the value of the text node and add it to the child list
mTextContent->SetText(label, false);
return NS_OK;
void nsGfxButtonControlFrame::AppendAnonymousContentTo(
nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
if (mTextContent) {
// Initially we hardcoded the default strings here.
// Next, we used html.css to store the default label for various types
// of buttons. (nsGfxButtonControlFrame::DoNavQuirksReflow rev 1.20)
// However, since html.css is not internationalized, we now grab the default
// label from a string bundle as is done for all other UI strings.
// See bug 16999 for further details.
nsresult nsGfxButtonControlFrame::GetDefaultLabel(nsAString& aString) const {
nsCOMPtr<nsIFormControl> form = do_QueryInterface(mContent);
auto type = form->ControlType();
const char* prop;
if (type == FormControlType::InputReset) {
prop = "Reset";
} else if (type == FormControlType::InputSubmit) {
prop = "Submit";
} else {
return NS_OK;
return nsContentUtils::GetMaybeLocalizedString(
nsContentUtils::eFORMS_PROPERTIES, prop, mContent->OwnerDoc(), aString);
nsresult nsGfxButtonControlFrame::GetLabel(nsString& aLabel) {
// Get the text from the "value" property on our content if there is
// one; otherwise set it to a default value (localized).
auto* elt = dom::HTMLInputElement::FromNode(mContent);
if (elt && elt->HasAttr(nsGkAtoms::value)) {
elt->GetValue(aLabel, dom::CallerType::System);
} else {
// Generate localized label.
// We can't make any assumption as to what the default would be
// because the value is localized for non-english platforms, thus
// it might not be the string "Reset", "Submit Query", or "Browse..."
nsresult rv;
rv = GetDefaultLabel(aLabel);
// Compress whitespace out of label if needed.
if (!StyleText()->WhiteSpaceIsSignificant()) {
} else if (aLabel.Length() > 2 && aLabel.First() == ' ' &&
aLabel.CharAt(aLabel.Length() - 1) == ' ') {
// This is a bit of a hack. The reason this is here is as follows: we now
// have default padding on our buttons to make them non-ugly.
// Unfortunately, IE-windows does not have such padding, so people will
// stick values like " ok " (with the spaces) in the buttons in an attempt
// to make them look decent. Unfortunately, if they do this the button
// looks way too big in Mozilla. Worse yet, if they do this _and_ set a
// fixed width for the button we run into trouble because our focus-rect
// border/padding and outer border take up 10px of the horizontal button
// space or so; the result is that the text is misaligned, even with the
// recentering we do in nsHTMLButtonControlFrame::Reflow. So to solve
// this, even if the whitespace is significant, single leading and trailing
// _spaces_ (and not other whitespace) are removed. The proper solution,
// of course, is to not have the focus rect painting taking up 6px of
// horizontal space. We should do that instead (changing the renderer) and
// remove this.
aLabel.Cut(0, 1);
aLabel.Truncate(aLabel.Length() - 1);
return NS_OK;
nsresult nsGfxButtonControlFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
nsresult rv = NS_OK;
// If the value attribute is set, update the text of the label
if (nsGkAtoms::value == aAttribute) {
if (mTextContent && mContent) {
nsAutoString label;
rv = GetLabel(label);
mTextContent->SetText(label, true);
} else {
// defer to HTMLButtonControlFrame
} else {
rv = nsHTMLButtonControlFrame::AttributeChanged(aNameSpaceID, aAttribute,
return rv;
nsresult nsGfxButtonControlFrame::HandleEvent(nsPresContext* aPresContext,
WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) {
// Override the HandleEvent to prevent the nsIFrame::HandleEvent
// from being called. The nsIFrame::HandleEvent causes the button label
// to be selected (Drawn with an XOR rectangle over the label)
if (IsContentDisabled()) {
return nsIFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
return NS_OK;