737 lines
26 KiB
JavaScript
737 lines
26 KiB
JavaScript
/*
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* Copyright 2016 Software Freedom Conservancy Inc.
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* Copyright 2016 Michael Gratton <mike@vee.net>
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*
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* This software is licensed under the GNU Lesser General Public License
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* (version 2.1 or later). See the COPYING file in this distribution.
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*/
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/**
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* Application logic for ComposerWebView.
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*/
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let ComposerPageState = function() {
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this.init.apply(this, arguments);
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};
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ComposerPageState.SPACE_CHAR_REGEX = /[\s]/i;
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ComposerPageState.WORD_CHAR_REGEX = /[\s\\'!"#$%&()*+,\-.\/:;<=>?@\[\]^_`{|}~\u2000-\u206F\u2E00-\u2E7F]/i;
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ComposerPageState.QUOTE_MARKER = "\x7f"; // delete
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ComposerPageState.PROTOCOL_REGEX = /^(aim|apt|bitcoin|cvs|ed2k|ftp|file|finger|git|gtalk|http|https|irc|ircs|irc6|lastfm|ldap|ldaps|magnet|news|nntp|rsync|sftp|skype|smb|sms|svn|telnet|tftp|ssh|webcal|xmpp):/i;
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// Taken from Geary.HTML.URL_REGEX, without the inline modifier (?x)
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// at the start, which is unsupported in JS
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ComposerPageState.URL_REGEX = new RegExp("\\b((?:[a-z][\\w-]+:(?:/{1,3}|[a-z0-9%])|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}/)(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{};:'\".,<>?«»“”‘’]))", "gi");
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ComposerPageState.prototype = {
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__proto__: PageState.prototype,
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init: function() {
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PageState.prototype.init.apply(this, []);
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this.bodyPart = null;
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this.signaturePart = null;
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this.quotePart = null;
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this.focusedPart = null;
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this.selections = new Map();
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this.nextSelectionId = 0;
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this.cursorContext = null;
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document.addEventListener("click", function(e) {
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if (e.target.tagName == "A") {
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e.preventDefault();
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}
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}, true);
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},
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loaded: function() {
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let state = this;
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this.bodyPart = document.getElementById("geary-body");
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if (this.bodyPart != null) {
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// Capture clicks on the document that aren't on an
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// existing part and prevent focus leaving it. Bug 779369.
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document.addEventListener("mousedown", function(e) {
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if (!state.containedInPart(e.target)) {
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e.preventDefault();
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e.stopPropagation();
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}
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});
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} else {
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// This happens if we are loading a draft created by a MUA
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// that isn't Geary, so we can't rely on any of the
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// expected HTML structure to be in place.
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this.bodyPart = document.body;
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}
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this.signaturePart = document.getElementById("geary-signature");
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this.quotePart = document.getElementById("geary-quote");
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// Should be using 'e.key' in listeners below instead of
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// keyIdentifier, but that was only fixed in WK in Oct 2016
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// (WK Bug 36267). Migrate to that when we can rely on it
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// being in WebKitGTK.
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document.body.addEventListener("keydown", function(e) {
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if (e.keyIdentifier == "U+0009" &&// Tab
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!e.ctrlKey && !e.altKey && !e.metaKey) {
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if (!e.shiftKey) {
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state.tabOut();
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} else {
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state.tabIn();
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}
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e.preventDefault();
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}
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});
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// We can't use keydown for this, captured or bubbled, since
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// that will also cause the line that the cursor is currently
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// positioned on when Enter is pressed to also be outdented.
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document.body.addEventListener("keyup", function(e) {
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if (e.keyIdentifier == "Enter" && !e.shiftKey) {
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// XXX WebKit seems to support both InsertNewline and
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// InsertNewlineInQuotedContent arguments for
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// execCommand, both of which sound like they would be
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// useful here. After a quick bit of testing neither
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// worked out of the box, so need to investigate
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// further. See:
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// https://github.com/WebKit/webkit/blob/master/Source/WebCore/editing/EditorCommand.cpp
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state.breakBlockquotes();
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}
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}, true);
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// Search for and remove a particular styling when we quote
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// text. If that style exists in the quoted text, we alter it
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// slightly so we don't mess with it later.
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let nodeList = document.querySelectorAll(
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"blockquote[style=\"margin: 0 0 0 40px; border: none; padding: 0px;\"]");
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for (let i = 0; i < nodeList.length; ++i) {
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nodeList.item(i).setAttribute(
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"style",
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"margin: 0 0 0 40px; padding: 0px; border:none;"
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);
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}
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// Focus within the HTML document
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document.body.focus();
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this.updateFocusClass(this.bodyPart);
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// Set text cursor at appropriate position
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let cursor = document.getElementById("cursormarker");
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if (cursor != null) {
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let range = document.createRange();
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range.selectNodeContents(cursor);
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range.collapse(false);
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let selection = window.getSelection();
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selection.removeAllRanges();
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selection.addRange(range);
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cursor.parentNode.removeChild(cursor);
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}
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// Enable editing only after modifying the body above.
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this.setEditable(true);
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PageState.prototype.loaded.apply(this, []);
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},
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setEditable: function(enabled) {
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if (!enabled) {
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this.stopBodyObserver();
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}
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this.bodyPart.contentEditable = true;
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if (this.signaturePart != null) {
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this.signaturePart.contentEditable = true;
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}
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if (this.quotePart != null) {
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this.quotePart.contentEditable = true;
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}
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if (enabled) {
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// Enable modification observation only after the document
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// has been set editable as WebKit will alter some attrs
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this.startBodyObserver();
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}
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},
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undo: function() {
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document.execCommand("undo", false, null);
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this.checkCommandStack();
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},
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redo: function() {
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document.execCommand("redo", false, null);
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this.checkCommandStack();
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},
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saveSelection: function() {
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let id = (++this.nextSelectionId).toString();
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this.selections.set(id, SelectionUtil.save());
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return id;
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},
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freeSelection: function(id) {
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this.selections.delete(id);
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},
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insertLink: function(href, selectionId) {
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SelectionUtil.restore(this.selections.get(selectionId));
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if (window.getSelection().isCollapsed) {
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// The saved selection was empty, which means that the user is
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// modifying an existing link instead of inserting a new one.
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let selection = SelectionUtil.save();
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let selected = SelectionUtil.getCursorElement();
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SelectionUtil.selectNode(selected);
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document.execCommand("createLink", false, href);
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SelectionUtil.restore(selection);
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} else {
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document.execCommand("createLink", false, href);
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}
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},
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deleteLink: function(selectionId) {
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SelectionUtil.restore(this.selections.get(selectionId));
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if (window.getSelection().isCollapsed) {
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// The saved selection was empty, which means that the user is
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// deleting the entire existing link.
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let selection = SelectionUtil.save();
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let selected = SelectionUtil.getCursorElement();
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SelectionUtil.selectNode(selected);
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document.execCommand("unlink", false, null);
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SelectionUtil.restore(selection);
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} else {
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document.execCommand("unlink", false, null);
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}
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},
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indentLine: function() {
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document.execCommand("indent", false, null);
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let nodeList = document.querySelectorAll(
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"blockquote[style=\"margin: 0 0 0 40px; border: none; padding: 0px;\"]"
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);
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for (let i = 0; i < nodeList.length; ++i) {
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let element = nodeList.item(i);
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element.removeAttribute("style");
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element.setAttribute("type", "cite");
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}
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},
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insertOrderedList: function() {
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document.execCommand("insertOrderedList", false, null);
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},
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insertUnorderedList: function() {
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document.execCommand("insertUnorderedList", false, null);
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},
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updateSignature: function(signature) {
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if (this.signaturePart != null) {
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if (signature.trim()) {
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this.signaturePart.innerHTML = signature;
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this.signaturePart.classList.remove("geary-no-display");
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} else {
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this.signaturePart.innerHTML = "";
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this.signaturePart.classList.add("geary-no-display");
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}
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}
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},
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deleteQuotedMessage: function() {
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if (this.quotePart != null) {
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this.quotePart.parentNode.removeChild(this.quotePart);
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this.quotePart = null;
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}
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},
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/**
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* Determines if subject or body content refers to attachments.
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*/
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containsAttachmentKeyword: function(keywordSpec, subject) {
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let ATTACHMENT_KEYWORDS_SUFFIX = "doc|pdf|xls|ppt|rtf|pps";
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let completeKeys = new Set(keywordSpec.toLocaleLowerCase().split("|"));
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let suffixKeys = new Set(ATTACHMENT_KEYWORDS_SUFFIX.split("|"));
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// Check the subject line
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if (ComposerPageState.containsKeywords(subject, completeKeys, suffixKeys)) {
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return true;
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}
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// Check the body text
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let content = ComposerPageState.htmlToText(
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this.bodyPart, ["blockquote"]
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);
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return ComposerPageState.containsKeywords(
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content, completeKeys, suffixKeys
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);
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},
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tabOut: function() {
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document.execCommand(
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"inserthtml", false, "<span style='white-space: pre-wrap'>\t</span>"
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);
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},
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tabIn: function() {
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// If there is no selection and the character before the
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// text cursor is tab, delete it.
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let selection = window.getSelection();
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if (selection.isCollapsed) {
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selection.modify("extend", "backward", "character");
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if (selection.getRangeAt(0).toString() == "\t") {
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document.execCommand("delete", false, null);
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} else {
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selection.collapseToEnd();
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}
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}
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},
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breakBlockquotes: function() {
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// Do this in two phases to avoid in-line mutations caused by
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// execCommand affecting the DOM srtcuture
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let count = 0;
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let node = SelectionUtil.getCursorElement();
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while (node != document.body) {
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if (node.nodeName == "BLOCKQUOTE") {
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count++;
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}
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node = node.parentNode;
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}
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while (count > 0) {
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document.execCommand("outdent", false, null);
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count--;
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}
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},
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cleanContent: function() {
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// Prevent any modification signals being sent when mutating
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// the document below.
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this.stopBodyObserver();
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ComposerPageState.cleanPart(this.bodyPart, false);
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ComposerPageState.linkify(this.bodyPart);
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this.signaturePart = ComposerPageState.cleanPart(this.signaturePart, true);
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this.quotePart = ComposerPageState.cleanPart(this.quotePart, true);
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},
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getHtml: function() {
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// Clone the message parts so we can clean them without
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// modifiying the DOM, needed when saving drafts. In contrast
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// with cleanContent above, we don't remove empty elements so
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// they still exist when restoring from draft
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let parent = document.createElement("DIV");
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parent.appendChild(
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ComposerPageState.cleanPart(this.bodyPart.cloneNode(true), false)
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);
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if (this.signaturePart != null) {
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parent.appendChild(
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ComposerPageState.cleanPart(
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this.signaturePart.cloneNode(true), false
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)
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);
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}
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if (this.quotePart != null) {
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parent.appendChild(
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ComposerPageState.cleanPart(
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this.quotePart.cloneNode(true), false
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)
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);
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}
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return parent.innerHTML;
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},
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getText: function() {
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let text = ComposerPageState.htmlToText(document.body);
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return ComposerPageState.replaceNonBreakingSpace(text);
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},
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setRichText: function(enabled) {
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if (enabled) {
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document.body.classList.remove("plain");
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} else {
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document.body.classList.add("plain");
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}
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},
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selectionChanged: function() {
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PageState.prototype.selectionChanged.apply(this, []);
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let cursor = SelectionUtil.getCursorElement();
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// Update cursor context
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if (cursor != null) {
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let newContext = new EditContext(cursor);
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if (!newContext.equals(this.cursorContext)) {
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this.cursorContext = newContext;
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window.webkit.messageHandlers.cursorContextChanged.postMessage(
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newContext.encode()
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);
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}
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}
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while (cursor != null) {
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let parent = cursor.parentNode;
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if (parent == document.body) {
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this.updateFocusClass(cursor);
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break;
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}
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cursor = parent;
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}
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},
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/**
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* Work around WebKit note yet supporting :focus-inside pseudoclass.
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*/
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updateFocusClass: function(newFocus) {
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if (this.focusedPart != null) {
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this.focusedPart.classList.remove("geary-focus");
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this.focusedPart = null;
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}
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if (newFocus == this.bodyPart ||
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newFocus == this.signaturePart ||
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newFocus == this.quotePart) {
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this.focusedPart = newFocus;
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this.focusedPart.classList.add("geary-focus");
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}
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},
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containedInPart: function(target) {
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let inPart = false;
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for (let part of [this.bodyPart, this.quotePart, this.signaturePart]) {
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if (part != null && (part == target || part.contains(target))) {
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inPart = true;
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break;
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}
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}
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return inPart;
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}
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};
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/**
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* Determines if any keywords are present in a string.
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*/
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ComposerPageState.containsKeywords = function(line, wordKeys, suffixKeys) {
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let lastToken = -1;
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let lastSpace = -1;
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for (var i = 0; i <= line.length; i++) {
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let char = (i < line.length) ? line[i] : " ";
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if (char.match(ComposerPageState.WORD_CHAR_REGEX)) {
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if (lastToken + 1 < i) {
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let wordToken = line.substring(lastToken + 1, i).toLocaleLowerCase();
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let isWordMatch = wordKeys.has(wordToken);
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let isSuffixMatch = suffixKeys.has(wordToken);
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if (isWordMatch || isSuffixMatch) {
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let spaceToken = line.substring(lastSpace + 1, i);
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let isUrl = (spaceToken.match(ComposerPageState.URL_REGEX) != null);
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// Matches a token if it is a word that isn't in a
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// URL. I.e. this gets "some attachment." but not
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// "http://attachment.com"
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if (isWordMatch && !isUrl) {
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return true;
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}
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// Matches a token if it is a suffix that isn't a
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// URL and such that the space-delimited token
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// ends with ".SUFFIX". I.e. this matches "see
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// attachment.pdf." but not
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// "http://example.com/attachment.pdf" or "see the
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// pdf."
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if (isSuffixMatch &&
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!isUrl &&
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spaceToken.length != (1 + wordToken.length) &&
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spaceToken.endsWith("." + wordToken)) {
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return true;
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}
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}
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}
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lastToken = i;
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if (char.match(ComposerPageState.SPACE_CHAR_REGEX)) {
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lastSpace = i;
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}
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}
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}
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return false;
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};
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/**
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* Removes internal attributes from a composer part..
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*/
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ComposerPageState.cleanPart = function(part, removeIfEmpty) {
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if (part != null) {
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part.removeAttribute("class");
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part.removeAttribute("contenteditable");
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if (removeIfEmpty && part.innerText.trim() == "") {
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part.parentNode.removeChild(part);
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part = null;
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}
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}
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return part;
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};
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/**
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* Gets plain text that adequately represents the information in the HTML
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*
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* Asterisks are inserted around bold text, slashes around italic text, and
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* underscores around underlined text. Link URLs are inserted after the link
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* text.
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*
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* Each line of a blockquote is prefixed with
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* `ComposerPageState.QUOTE_MARKER`, where the number of markers indicates
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* the depth of nesting of the quote.
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*/
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ComposerPageState.htmlToText = function(root, blacklist = []) {
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let parentStyle = window.getComputedStyle(root);
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let text = "";
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for (let node of (root.childNodes || [])) {
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let nodeName = node.nodeName.toLowerCase();
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if (blacklist.includes(nodeName)) {
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continue;
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}
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let isBlock = (
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node instanceof Element
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&& window.getComputedStyle(node).display == "block"
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&& node.innerText
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);
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if (isBlock) {
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// Make sure there's a newline before the element
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if (text != "" && text.substr(-1) != "\n") {
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text += "\n";
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}
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}
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switch (nodeName) {
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case "#text":
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let nodeText = node.nodeValue;
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switch (parentStyle.whiteSpace) {
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case 'normal':
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case 'nowrap':
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case 'pre-line':
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// Only space, tab, carriage return, and newline collapse
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// https://www.w3.org/TR/2011/REC-CSS2-20110607/text.html#white-space-model
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nodeText = nodeText.replace(/[ \t\r\n]+/g, " ");
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if (nodeText == " " && " \t\r\n".includes(text.substr(-1)))
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break; // There's already whitespace here
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if (node == root.firstChild)
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nodeText = nodeText.replace(/^ /, "");
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if (node == root.lastChild)
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nodeText = nodeText.replace(/ $/, "");
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// Fall through
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default:
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text += nodeText;
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break;
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}
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break;
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case "a":
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if (node.closest("body.plain")) {
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text += ComposerPageState.htmlToText(node, blacklist);
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} else if (node.textContent == node.href) {
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text += "<" + node.href + ">";
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} else {
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text += ComposerPageState.htmlToText(node, blacklist);
|
||
text += " <" + node.href + ">";
|
||
}
|
||
break;
|
||
case "b":
|
||
case "strong":
|
||
if (node.closest("body.plain")) {
|
||
text += ComposerPageState.htmlToText(node, blacklist);
|
||
} else {
|
||
text += "*" + ComposerPageState.htmlToText(node, blacklist) + "*";
|
||
}
|
||
break;
|
||
case "blockquote":
|
||
let bqText = ComposerPageState.htmlToText(node, blacklist);
|
||
// If there is a newline at the end of the quote, remove it
|
||
// After this switch we ensure that there is a newline after the quote
|
||
bqText = bqText.replace(/\n$/, "");
|
||
let lines = bqText.split("\n");
|
||
for (let i = 0; i < lines.length; i++)
|
||
lines[i] = ComposerPageState.QUOTE_MARKER + lines[i];
|
||
text += lines.join("\n");
|
||
break;
|
||
case "br":
|
||
text += "\n";
|
||
break;
|
||
case "i":
|
||
case "em":
|
||
if (node.closest("body.plain")) {
|
||
text += ComposerPageState.htmlToText(node, blacklist);
|
||
} else {
|
||
text += "/" + ComposerPageState.htmlToText(node, blacklist) + "/";
|
||
}
|
||
break;
|
||
case "u":
|
||
if (node.closest("body.plain")) {
|
||
text += ComposerPageState.htmlToText(node, blacklist);
|
||
} else {
|
||
text += "_" + ComposerPageState.htmlToText(node, blacklist) + "_";
|
||
}
|
||
break;
|
||
case "#comment":
|
||
case "style":
|
||
break;
|
||
default:
|
||
text += ComposerPageState.htmlToText(node, blacklist);
|
||
break;
|
||
}
|
||
if (isBlock) {
|
||
// Ensure that the last character is a newline
|
||
if (text.substr(-1) != "\n") {
|
||
text += "\n";
|
||
}
|
||
if (node.nodeName.toLowerCase() == "p") {
|
||
// Ensure that the last two characters are newlines
|
||
if (text.substr(-2, 1) != "\n") {
|
||
text += "\n";
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return text;
|
||
};
|
||
|
||
// Linkifies "plain text" link
|
||
ComposerPageState.linkify = function(node) {
|
||
if (node.nodeType == Node.TEXT_NODE) {
|
||
while (node.nodeValue) {
|
||
// Examine text node for something that looks like a URL
|
||
let urlRegex = new RegExp(ComposerPageState.URL_REGEX);
|
||
let url;
|
||
do {
|
||
let urlMatch = urlRegex.exec(node.nodeValue);
|
||
if (!urlMatch) {
|
||
return;
|
||
}
|
||
url = urlMatch[0];
|
||
} while (!url.match(ComposerPageState.PROTOCOL_REGEX));
|
||
|
||
// We got one! Now split the text and swap in a new anchor.
|
||
let before = node.nodeValue.substring(0, urlRegex.lastIndex - url.length);
|
||
let after = node.nodeValue.substring(urlRegex.lastIndex);
|
||
|
||
let beforeNode = document.createTextNode(before);
|
||
let linkNode = document.createElement("A");
|
||
linkNode.href = url;
|
||
linkNode.textContent = url;
|
||
let afterNode = document.createTextNode(after);
|
||
|
||
let parentNode = node.parentNode;
|
||
parentNode.insertBefore(beforeNode, node);
|
||
parentNode.insertBefore(linkNode, node);
|
||
parentNode.insertBefore(afterNode, node);
|
||
parentNode.removeChild(node);
|
||
|
||
// Keep searching for URLs after this one
|
||
node = afterNode;
|
||
}
|
||
} else {
|
||
// Recurse
|
||
let child = node.firstChild;
|
||
while (child != null) {
|
||
// Save the child and get its next sibling early since if
|
||
// it does actually contain a URL, it will be removed from
|
||
// the tree
|
||
let target = child;
|
||
child = child.nextSibling;
|
||
// Don't attempt to linkify existing links
|
||
if (target.nodeName != "A") {
|
||
ComposerPageState.linkify(target);
|
||
}
|
||
}
|
||
}
|
||
};
|
||
|
||
/**
|
||
* Converts all non-breaking space chars to plain spaces.
|
||
*/
|
||
ComposerPageState.replaceNonBreakingSpace = function(text) {
|
||
// XXX this is a separate function for unit testing - since when
|
||
// running as a unit test, HTMLElement.innerText appears to not
|
||
// convert   into U+00A0.
|
||
return text.replace(new RegExp(" ", "g"), " ");
|
||
};
|
||
|
||
|
||
/**
|
||
* Encapsulates editing-related state for a specific DOM node.
|
||
*
|
||
* This must be kept in sync with the vala object of the same name.
|
||
*/
|
||
let EditContext = function() {
|
||
this.init.apply(this, arguments);
|
||
};
|
||
EditContext.LINK_MASK = 1 << 0;
|
||
|
||
EditContext.prototype = {
|
||
init: function(node) {
|
||
this.context = 0;
|
||
this.linkUrl = "";
|
||
|
||
if (node.nodeName == "A") {
|
||
this.context |= EditContext.LINK_MASK;
|
||
this.linkUrl = node.href;
|
||
}
|
||
|
||
let styles = window.getComputedStyle(node);
|
||
let fontFamily = styles.getPropertyValue("font-family");
|
||
if (["'", "\""].indexOf(fontFamily.charAt()) != -1) {
|
||
fontFamily = fontFamily.substr(1, fontFamily.length - 2);
|
||
}
|
||
this.fontFamily = fontFamily;
|
||
this.fontSize = styles.getPropertyValue("font-size").replace("px", "");
|
||
},
|
||
equals: function(other) {
|
||
return other != null
|
||
&& this.context == other.context
|
||
&& this.linkUrl == other.linkUrl
|
||
&& this.fontFamily == other.fontFamily
|
||
&& this.fontSize == other.fontSize;
|
||
},
|
||
encode: function() {
|
||
return [
|
||
this.context.toString(16),
|
||
this.linkUrl,
|
||
this.fontFamily,
|
||
this.fontSize
|
||
].join(",");
|
||
}
|
||
};
|
||
|
||
|
||
/**
|
||
* Utility methods for managing the DOM Selection.
|
||
*/
|
||
let SelectionUtil = {
|
||
/**
|
||
* Returns the element immediately under the text cursor.
|
||
*
|
||
* If there is a non-empty selection, the element at the end of the
|
||
* selection is returned.
|
||
*/
|
||
getCursorElement: function() {
|
||
let selection = window.getSelection();
|
||
let node = selection.focusNode;
|
||
if (node != null && node.nodeType != Node.ELEMENT_NODE) {
|
||
node = node.parentNode;
|
||
}
|
||
return node;
|
||
},
|
||
/**
|
||
* Modifies the selection so that it contains the given target node.
|
||
*/
|
||
selectNode: function(target) {
|
||
let newRange = new Range();
|
||
newRange.selectNode(target);
|
||
|
||
let selection = window.getSelection();
|
||
selection.removeAllRanges();
|
||
selection.addRange(newRange);
|
||
},
|
||
/**
|
||
* Saves the current selection so it can be restored with `restore`.
|
||
*/
|
||
save: function() {
|
||
let selection = window.getSelection();
|
||
var ranges = [];
|
||
let len = selection.rangeCount;
|
||
for (let i = 0; i < len; ++i) {
|
||
ranges.push(selection.getRangeAt(i));
|
||
}
|
||
return ranges;
|
||
},
|
||
/**
|
||
* Restores the selection saved with `save`.
|
||
*/
|
||
restore: function(saved) {
|
||
let selection = window.getSelection();
|
||
selection.removeAllRanges();
|
||
for (let i = 0; i < saved.length; i++) {
|
||
selection.addRange(saved[i]);
|
||
}
|
||
}
|
||
};
|
||
|
||
|
||
var geary = new ComposerPageState();
|