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/* 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
export class MailMessageChild extends JSWindowActorChild {
handleEvent(event) {
switch (event.type) {
case "click":
this.onClick(event);
break;
case "resize":
this.onResize(event);
break;
}
}
receiveMessage(message) {
switch (message.name) {
case "MailMessage:AnalyzeMessageBody":
return PhishingDetector.analyzeMessageBody(this.document);
case "MailMessage:GetSelectionForQuoting":
return this.getSelectionForQuoting();
}
return undefined;
}
onClick(event) {
const target = event.target;
// Is this an image that we might want to scale?
if (HTMLImageElement.isInstance(target) && target.src) {
// Make sure it loaded successfully. No action if not or a broken link.
const req = target.getRequest(Ci.nsIImageLoadingContent.CURRENT_REQUEST);
if (!req || req.imageStatus & Ci.imgIRequest.STATUS_ERROR) {
return;
}
// Is it an image?
if (target.localName == "img" && target.hasAttribute("overflowing")) {
event.preventDefault();
target.toggleAttribute("shrinktofit");
}
}
}
onResize(event) {
const win = event.target;
const doc = win.document;
// Bail out if it's http content or we don't have images.
if (doc?.URL.startsWith("http") || !doc?.images) {
return;
}
const availableWidth = Math.max(
doc.body.scrollWidth,
win.visualViewport.width
);
const adjustImg = img => {
if (img.hasAttribute("shrinktofit")) {
// overflowing: Whether the image is overflowing visible area.
img.toggleAttribute("overflowing", img.naturalWidth > img.clientWidth);
} else if (img.hasAttribute("overflowing")) {
const isOverflowing = img.clientWidth >= availableWidth;
img.toggleAttribute("overflowing", isOverflowing);
img.toggleAttribute("shrinktofit", !isOverflowing);
}
};
for (const img of doc.querySelectorAll(
"img:is([shrinktofit],[overflowing])"
)) {
if (img.closest("[href]")) {
continue;
}
if (!img.complete) {
img.addEventListener("load", event => adjustImg(event.target), {
once: true,
});
} else {
adjustImg(img);
}
}
}
/**
* Returns the selection (as an HTML fragment) for quoting.
*
* @returns {string}
*/
getSelectionForQuoting() {
const selection = this.browsingContext.associatedWindow?.getSelection();
if (!selection || selection.type != "Range") {
return "";
}
const node = selection.focusNode;
if (!node) {
return "";
}
const requireMultipleWords = Services.prefs.getBoolPref(
"mailnews.reply_quoting_selection.multi_word"
);
const charsOnlyIf = Services.prefs.getStringPref(
"mailnews.reply_quoting_selection.only_if_chars"
);
if (requireMultipleWords || charsOnlyIf) {
const plain = selection.toStringWithFormat(
"text/plain",
Ci.nsIDocumentEncoder.OutputRaw |
Ci.nsIDocumentEncoder.SkipInvisibleContent,
0
);
// If "mailnews.reply_quoting_selection.multi_word" is on, then there
// must be at least two words selected in order to quote just the
// selected text.
if (requireMultipleWords) {
if (!plain || !/\S\s+\S/.test(plain)) {
return "";
}
}
// If "mailnews.reply_quoting_selection.only_if_chars" has a value,
// then at least one of the characters must be present in order to
// quote just the selected text.
if (charsOnlyIf) {
let foundChar = false;
for (const char of Array.from(charsOnlyIf)) {
if (plain.includes(char)) {
foundChar = true;
break;
}
}
if (!foundChar) {
return "";
}
}
}
let html = selection.toStringWithFormat(
"text/html",
Ci.nsIDocumentEncoder.OutputRaw |
Ci.nsIDocumentEncoder.SkipInvisibleContent,
0
);
// Now remove <span class="moz-txt-citetags">> </span>.
let spanInd = html.indexOf(`<span class="moz-txt-citetags">`);
while (spanInd != -1) {
const endInd = html.indexOf("</span>", spanInd);
if (endInd == -1) {
break; // Oops, where is the closing tag gone?
}
html = html.substring(0, spanInd) + html.substring(endInd + 7);
spanInd = html.indexOf(`<span class="moz-txt-citetags">`);
}
// Wrap in <pre> if it's an actual HTML <pre> block or a plain-text email.
let isInPre = false;
if (node.closest) {
isInPre = node.closest("pre");
} else {
isInPre =
node.parentNode.closest("pre") ||
node.ownerDocument.querySelector(
"body > div:first-of-type.moz-text-plain"
);
}
if (isInPre) {
return `<pre class="moz-quote-pre" wrap="">${html}</pre>`;
}
return html;
}
}