зеркало из https://github.com/mozilla/gecko-dev.git
1545 строки
54 KiB
JavaScript
1545 строки
54 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["FinderHighlighter"];
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const { interfaces: Ci, utils: Cu } = Components;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/Task.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "Color", "resource://gre/modules/Color.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "Rect", "resource://gre/modules/Geometry.jsm");
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XPCOMUtils.defineLazyGetter(this, "kDebug", () => {
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const kDebugPref = "findbar.modalHighlight.debug";
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return Services.prefs.getPrefType(kDebugPref) && Services.prefs.getBoolPref(kDebugPref);
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});
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const kContentChangeThresholdPx = 5;
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const kBrightTextSampleSize = 5;
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const kModalHighlightRepaintLoFreqMs = 100;
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const kModalHighlightRepaintHiFreqMs = 16;
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const kHighlightAllPref = "findbar.highlightAll";
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const kModalHighlightPref = "findbar.modalHighlight";
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const kFontPropsCSS = ["color", "font-family", "font-kerning", "font-size",
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"font-size-adjust", "font-stretch", "font-variant", "font-weight", "line-height",
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"letter-spacing", "text-emphasis", "text-orientation", "text-transform", "word-spacing"];
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const kFontPropsCamelCase = kFontPropsCSS.map(prop => {
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let parts = prop.split("-");
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return parts.shift() + parts.map(part => part.charAt(0).toUpperCase() + part.slice(1)).join("");
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});
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const kRGBRE = /^rgba?\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*/i;
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// This uuid is used to prefix HTML element IDs in order to make them unique and
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// hard to clash with IDs content authors come up with.
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const kModalIdPrefix = "cedee4d0-74c5-4f2d-ab43-4d37c0f9d463";
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const kModalOutlineId = kModalIdPrefix + "-findbar-modalHighlight-outline";
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const kModalStyles = {
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outlineNode: [
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["position", "absolute"],
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["background", "#ffc535"],
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["border-radius", "3px"],
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["box-shadow", "0 2px 0 0 rgba(0,0,0,.1)"],
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["color", "#000"],
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["display", "-moz-box"],
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["margin", "-2px 0 0 -2px !important"],
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["padding", "2px !important"],
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["pointer-events", "none"],
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["white-space", "nowrap"],
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["will-change", "transform"],
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["z-index", 2]
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],
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outlineNodeDebug: [ ["z-index", 2147483647] ],
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outlineText: [
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["margin", "0 !important"],
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["padding", "0 !important"],
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["vertical-align", "top !important"]
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],
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maskNode: [
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["background", "rgba(0,0,0,.35)"],
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["pointer-events", "none"],
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["position", "absolute"],
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["z-index", 1]
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],
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maskNodeDebug: [
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["z-index", 2147483646],
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["top", 0],
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["left", 0]
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],
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maskNodeBrightText: [ ["background", "rgba(255,255,255,.35)"] ]
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};
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const kModalOutlineAnim = {
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"keyframes": [
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{ transform: "scaleX(1) scaleY(1)" },
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{ transform: "scaleX(1.5) scaleY(1.5)", offset: .5, easing: "ease-in" },
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{ transform: "scaleX(1) scaleY(1)" }
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],
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duration: 50,
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};
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const kNSHTML = "http://www.w3.org/1999/xhtml";
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function mockAnonymousContentNode(domNode) {
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return {
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setTextContentForElement(id, text) {
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(domNode.querySelector("#" + id) || domNode).textContent = text;
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},
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getAttributeForElement(id, attrName) {
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let node = domNode.querySelector("#" + id) || domNode;
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if (!node.hasAttribute(attrName))
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return undefined;
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return node.getAttribute(attrName);
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},
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setAttributeForElement(id, attrName, attrValue) {
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(domNode.querySelector("#" + id) || domNode).setAttribute(attrName, attrValue);
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},
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removeAttributeForElement(id, attrName) {
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let node = domNode.querySelector("#" + id) || domNode;
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if (!node.hasAttribute(attrName))
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return;
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node.removeAttribute(attrName);
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},
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remove() {
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try {
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domNode.parentNode.removeChild(domNode);
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} catch (ex) {}
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},
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setAnimationForElement(id, keyframes, duration) {
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return (domNode.querySelector("#" + id) || domNode).animate(keyframes, duration);
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},
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setCutoutRectsForElement(id, rects) {
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// no-op for now.
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}
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};
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}
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let gWindows = new Map();
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/**
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* FinderHighlighter class that is used by Finder.jsm to take care of the
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* 'Highlight All' feature, which can highlight all find occurrences in a page.
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*
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* @param {Finder} finder Finder.jsm instance
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*/
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function FinderHighlighter(finder) {
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this._highlightAll = Services.prefs.getBoolPref(kHighlightAllPref);
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this._modal = Services.prefs.getBoolPref(kModalHighlightPref);
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this.finder = finder;
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}
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FinderHighlighter.prototype = {
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get iterator() {
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if (this._iterator)
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return this._iterator;
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this._iterator = Cu.import("resource://gre/modules/FinderIterator.jsm", null).FinderIterator;
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return this._iterator;
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},
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/**
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* Each window is unique, globally, and the relation between an active
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* highlighting session and a window is 1:1.
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* For each window we track a number of properties which _at least_ consist of
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* - {Set} dynamicRangesSet Set of ranges that may move around, depending
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* on page layout changes and user input
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* - {Map} frames Collection of frames that were encountered
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* when inspecting the found ranges
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* - {Map} modalHighlightRectsMap Collection of ranges and their corresponding
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* Rects
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*
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* @param {nsIDOMWindow} window
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* @return {Object}
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*/
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getForWindow(window, propName = null) {
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if (!gWindows.has(window)) {
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gWindows.set(window, {
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dynamicRangesSet: new Set(),
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frames: new Map(),
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modalHighlightRectsMap: new Map(),
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previousRangeRectsCount: 0
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});
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}
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return gWindows.get(window);
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},
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/**
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* Notify all registered listeners that the 'Highlight All' operation finished.
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*
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* @param {Boolean} highlight Whether highlighting was turned on
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*/
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notifyFinished(highlight) {
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for (let l of this.finder._listeners) {
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try {
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l.onHighlightFinished(highlight);
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} catch (ex) {}
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}
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},
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/**
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* Toggle highlighting all occurrences of a word in a page. This method will
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* be called recursively for each (i)frame inside a page.
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*
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* @param {Booolean} highlight Whether highlighting should be turned on
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* @param {String} word Needle to search for and highlight when found
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* @param {Boolean} linksOnly Only consider nodes that are links for the search
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* @yield {Promise} that resolves once the operation has finished
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*/
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highlight: Task.async(function* (highlight, word, linksOnly) {
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let window = this.finder._getWindow();
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let dict = this.getForWindow(window);
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let controller = this.finder._getSelectionController(window);
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let doc = window.document;
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this._found = false;
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if (!controller || !doc || !doc.documentElement) {
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// Without the selection controller,
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// we are unable to (un)highlight any matches
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return this._found;
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}
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if (highlight) {
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let params = {
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allowDistance: 1,
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caseSensitive: this.finder._fastFind.caseSensitive,
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entireWord: this.finder._fastFind.entireWord,
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linksOnly, word,
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finder: this.finder,
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listener: this,
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useCache: true
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};
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if (this.iterator._areParamsEqual(params, dict.lastIteratorParams))
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return this._found;
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if (params) {
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yield this.iterator.start(params);
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if (this._found)
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this.finder._outlineLink(true);
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}
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} else {
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this.hide(window);
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// Removing the highlighting always succeeds, so return true.
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this._found = true;
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}
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this.notifyFinished({ highlight, found: this._found });
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return this._found;
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}),
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// FinderIterator listener implementation
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onIteratorRangeFound(range) {
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this.highlightRange(range);
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this._found = true;
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},
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onIteratorReset() {},
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onIteratorRestart() {
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this.clear(this.finder._getWindow());
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},
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onIteratorStart(params) {
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let window = this.finder._getWindow();
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let dict = this.getForWindow(window);
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// Save a clean params set for use later in the `update()` method.
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dict.lastIteratorParams = params;
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if (!this._modal)
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this.hide(window, this.finder._fastFind.getFoundRange());
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this.clear(window);
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},
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/**
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* Add a range to the find selection, i.e. highlight it, and if it's inside an
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* editable node, track it.
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*
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* @param {nsIDOMRange} range Range object to be highlighted
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*/
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highlightRange(range) {
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let node = range.startContainer;
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let editableNode = this._getEditableNode(node);
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let window = node.ownerDocument.defaultView;
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let controller = this.finder._getSelectionController(window);
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if (editableNode) {
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controller = editableNode.editor.selectionController;
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}
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if (this._modal) {
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this._modalHighlight(range, controller, window);
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} else {
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let findSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
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findSelection.addRange(range);
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// Check if the range is inside an iframe.
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if (window != window.top) {
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let dict = this.getForWindow(window.top);
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if (!dict.frames.has(window))
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dict.frames.set(window, null);
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}
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}
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if (editableNode) {
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// Highlighting added, so cache this editor, and hook up listeners
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// to ensure we deal properly with edits within the highlighting
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this._addEditorListeners(editableNode.editor);
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}
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},
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/**
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* If modal highlighting is enabled, show the dimmed background that will overlay
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* the page.
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*
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* @param {nsIDOMWindow} window The dimmed background will overlay this window.
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* Optional, defaults to the finder window.
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*/
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show(window = null) {
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window = (window || this.finder._getWindow()).top;
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let dict = this.getForWindow(window);
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if (!this._modal || dict.visible)
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return;
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dict.visible = true;
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this._maybeCreateModalHighlightNodes(window);
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this._addModalHighlightListeners(window);
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},
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/**
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* Clear all highlighted matches. If modal highlighting is enabled and
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* the outline + dimmed background is currently visible, both will be hidden.
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*
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* @param {nsIDOMWindow} window The dimmed background will overlay this window.
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* Optional, defaults to the finder window.
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* @param {nsIDOMRange} skipRange A range that should not be removed from the
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* find selection.
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* @param {nsIDOMEvent} event When called from an event handler, this will
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* be the triggering event.
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*/
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hide(window = null, skipRange = null, event = null) {
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// Do not hide on anything but a left-click.
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if (event && event.type == "click" && event.button !== 0)
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return;
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try {
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window = (window || this.finder._getWindow()).top;
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} catch (ex) {
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Cu.reportError(ex);
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return;
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}
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let dict = this.getForWindow(window);
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this._clearSelection(this.finder._getSelectionController(window), skipRange);
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for (let frame of dict.frames.keys())
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this._clearSelection(this.finder._getSelectionController(frame), skipRange);
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// Next, check our editor cache, for editors belonging to this
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// document
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if (this._editors) {
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let doc = window.document;
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for (let x = this._editors.length - 1; x >= 0; --x) {
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if (this._editors[x].document == doc) {
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this._clearSelection(this._editors[x].selectionController, skipRange);
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// We don't need to listen to this editor any more
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this._unhookListenersAtIndex(x);
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}
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}
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}
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if (dict.modalRepaintScheduler) {
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window.clearTimeout(dict.modalRepaintScheduler);
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dict.modalRepaintScheduler = null;
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}
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dict.lastWindowDimensions = null;
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if (dict.modalHighlightOutline) {
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dict.modalHighlightOutline.setAttributeForElement(kModalOutlineId, "style",
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dict.modalHighlightOutline.getAttributeForElement(kModalOutlineId, "style") +
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"; opacity: 0");
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}
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this._removeHighlightAllMask(window);
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this._removeModalHighlightListeners(window);
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dict.visible = false;
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},
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/**
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* Called by the Finder after a find result comes in; update the position and
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* content of the outline to the newly found occurrence.
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* To make sure that the outline covers the found range completely, all the
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* CSS styles that influence the text are copied and applied to the outline.
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*
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* @param {Object} data Dictionary coming from Finder that contains the
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* following properties:
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* {Number} result One of the nsITypeAheadFind.FIND_* constants
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* indicating the result of a search operation.
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* {Boolean} findBackwards If TRUE, the search was performed backwards,
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* FALSE if forwards.
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* {Boolean} findAgain If TRUE, the search was performed using the same
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* search string as before.
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* {String} linkURL If a link was hit, this will contain a URL string.
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* {Rect} rect An object with top, left, width and height
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* coordinates of the current selection.
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* {String} searchString The string the search was performed with.
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* {Boolean} storeResult Indicator if the search string should be stored
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* by the consumer of the Finder.
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*/
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update(data) {
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let window = this.finder._getWindow();
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let dict = this.getForWindow(window);
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let foundRange = this.finder._fastFind.getFoundRange();
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if (!this._modal) {
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if (this._highlightAll) {
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dict.currentFoundRange = foundRange;
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let params = this.iterator.params;
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if (this.iterator._areParamsEqual(params, dict.lastIteratorParams))
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return;
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if (params)
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this.highlight(true, params.word, params.linksOnly);
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}
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return;
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}
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if (data.result == Ci.nsITypeAheadFind.FIND_NOTFOUND || !data.searchString || !foundRange) {
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this.hide();
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return;
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}
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if (foundRange !== dict.currentFoundRange || data.findAgain) {
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dict.currentFoundRange = foundRange;
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let textContent = this._getRangeContentArray(foundRange);
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if (!textContent.length) {
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this.hide(window);
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return;
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}
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if (data.findAgain)
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dict.updateAllRanges = true;
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if (!dict.visible)
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this.show(window);
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else
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this._maybeCreateModalHighlightNodes(window);
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this._updateRangeOutline(dict, textContent);
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}
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let outlineNode = dict.modalHighlightOutline;
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if (outlineNode) {
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if (dict.animation)
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dict.animation.finish();
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dict.animation = outlineNode.setAnimationForElement(kModalOutlineId,
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Cu.cloneInto(kModalOutlineAnim.keyframes, window), kModalOutlineAnim.duration);
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dict.animation.onfinish = () => dict.animation = null;
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}
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if (this._highlightAll)
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this.highlight(true, data.searchString, data.linksOnly);
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},
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/**
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* Invalidates the list by clearing the map of highlighted ranges that we
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* keep to build the mask for.
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*/
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clear(window = null) {
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if (!window) {
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// Since we're clearing _all the things_, make sure we hide 'em all as well.
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for (let win of gWindows.keys())
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this.hide(win);
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// Reset the Map, because no range references a node anymore.
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gWindows.clear();
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return;
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}
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let dict = this.getForWindow(window.top);
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if (dict.animation)
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dict.animation.finish();
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dict.dynamicRangesSet.clear();
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dict.frames.clear();
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dict.modalHighlightRectsMap.clear();
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dict.brightText = null;
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},
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/**
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* When the current page is refreshed or navigated away from, the CanvasFrame
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* contents is not valid anymore, i.e. all anonymous content is destroyed.
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* We need to clear the references we keep, which'll make sure we redraw
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* everything when the user starts to find in page again.
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*/
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onLocationChange() {
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let window = this.finder._getWindow();
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this.hide(window);
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let dict = this.getForWindow(window);
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this.clear(window);
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dict.currentFoundRange = dict.lastIteratorParams = null;
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if (!dict.modalHighlightOutline)
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return;
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if (kDebug) {
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dict.modalHighlightOutline.remove();
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} else {
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try {
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window.document.removeAnonymousContent(dict.modalHighlightOutline);
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} catch (ex) {}
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}
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dict.modalHighlightOutline = null;
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},
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/**
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* When `kModalHighlightPref` pref changed during a session, this callback is
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* invoked. When modal highlighting is turned off, we hide the CanvasFrame
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* contents.
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*
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* @param {Boolean} useModalHighlight
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*/
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onModalHighlightChange(useModalHighlight) {
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if (this._modal && !useModalHighlight) {
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this.hide();
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this.clear();
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}
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this._modal = useModalHighlight;
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},
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/**
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* When 'Highlight All' is toggled during a session, this callback is invoked
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* and when it's turned off, the found occurrences will be removed from the mask.
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*
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* @param {Boolean} highlightAll
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*/
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onHighlightAllChange(highlightAll) {
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|
this._highlightAll = highlightAll;
|
|
if (!highlightAll) {
|
|
let window = this.finder._getWindow();
|
|
if (!this._modal)
|
|
this.hide(window);
|
|
this.clear(window);
|
|
this._scheduleRepaintOfMask(window);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Utility; removes all ranges from the find selection that belongs to a
|
|
* controller. Optionally skips a specific range.
|
|
*
|
|
* @param {nsISelectionController} controller
|
|
* @param {nsIDOMRange} restoreRange
|
|
*/
|
|
_clearSelection(controller, restoreRange = null) {
|
|
if (!controller)
|
|
return;
|
|
let sel = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
sel.removeAllRanges();
|
|
if (restoreRange) {
|
|
sel = controller.getSelection(Ci.nsISelectionController.SELECTION_NORMAL);
|
|
sel.addRange(restoreRange);
|
|
controller.setDisplaySelection(Ci.nsISelectionController.SELECTION_ATTENTION);
|
|
controller.repaintSelection(Ci.nsISelectionController.SELECTION_NORMAL);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Utility; get the nsIDOMWindowUtils for a window.
|
|
*
|
|
* @param {nsIDOMWindow} window Optional, defaults to the finder window.
|
|
* @return {nsIDOMWindowUtils}
|
|
*/
|
|
_getDWU(window = null) {
|
|
return (window || this.finder._getWindow())
|
|
.QueryInterface(Ci.nsIInterfaceRequestor)
|
|
.getInterface(Ci.nsIDOMWindowUtils);
|
|
},
|
|
|
|
/**
|
|
* Utility; returns the bounds of the page relative to the viewport.
|
|
* If the pages is part of a frameset or inside an iframe of any kind, its
|
|
* offset is accounted for.
|
|
* Geometry.jsm takes care of the DOMRect calculations.
|
|
*
|
|
* @param {nsIDOMWindow} window Window to read the boundary rect from
|
|
* @param {Boolean} [includeScroll] Whether to ignore the scroll offset,
|
|
* which is useful for comparing DOMRects.
|
|
* Optional, defaults to `true`
|
|
* @return {Rect}
|
|
*/
|
|
_getRootBounds(window, includeScroll = true) {
|
|
let dwu = this._getDWU(window.top);
|
|
let cssPageRect = Rect.fromRect(dwu.getRootBounds());
|
|
let scrollX = {};
|
|
let scrollY = {};
|
|
if (includeScroll) {
|
|
dwu.getScrollXY(false, scrollX, scrollY);
|
|
cssPageRect.translate(scrollX.value, scrollY.value);
|
|
}
|
|
|
|
// If we're in a frame, update the position of the rect (top/ left).
|
|
let currWin = window;
|
|
while (currWin != window.top) {
|
|
// Since the frame is an element inside a parent window, we'd like to
|
|
// learn its position relative to it.
|
|
let el = this._getDWU(currWin).containerElement;
|
|
currWin = currWin.parent;
|
|
dwu = this._getDWU(currWin);
|
|
let parentRect = Rect.fromRect(dwu.getBoundsWithoutFlushing(el));
|
|
|
|
if (includeScroll) {
|
|
dwu.getScrollXY(false, scrollX, scrollY);
|
|
parentRect.translate(scrollX.value, scrollY.value);
|
|
}
|
|
|
|
cssPageRect.translate(parentRect.left, parentRect.top);
|
|
}
|
|
|
|
return cssPageRect;
|
|
},
|
|
|
|
/**
|
|
* Utility; fetch the full width and height of the current window, excluding
|
|
* scrollbars.
|
|
*
|
|
* @param {nsiDOMWindow} window The current finder window.
|
|
* @return {Object} The current full page dimensions with `width` and `height`
|
|
* properties
|
|
*/
|
|
_getWindowDimensions(window) {
|
|
// First we'll try without flushing layout, because it's way faster.
|
|
let dwu = this._getDWU(window);
|
|
let { width, height } = dwu.getRootBounds();
|
|
|
|
if (!width || !height) {
|
|
// We need a flush after all :'(
|
|
width = window.innerWidth + window.scrollMaxX - window.scrollMinX;
|
|
height = window.innerHeight + window.scrollMaxY - window.scrollMinY;
|
|
|
|
let scrollbarHeight = {};
|
|
let scrollbarWidth = {};
|
|
dwu.getScrollbarSize(false, scrollbarWidth, scrollbarHeight);
|
|
width -= scrollbarWidth.value;
|
|
height -= scrollbarHeight.value;
|
|
}
|
|
|
|
return { width, height };
|
|
},
|
|
|
|
/**
|
|
* Utility; fetch the current text contents of a given range.
|
|
*
|
|
* @param {nsIDOMRange} range Range object to extract the contents from.
|
|
* @return {Array} Snippets of text.
|
|
*/
|
|
_getRangeContentArray(range) {
|
|
let content = range.cloneContents();
|
|
let t, textContent = [];
|
|
for (let node of content.childNodes) {
|
|
t = node.textContent || node.nodeValue;
|
|
//if (t && t.trim())
|
|
textContent.push(t);
|
|
}
|
|
return textContent;
|
|
},
|
|
|
|
/**
|
|
* Utility; get all available font styles as applied to the content of a given
|
|
* range. The CSS properties we look for can be found in `kFontPropsCSS`.
|
|
*
|
|
* @param {nsIDOMRange} range Range to fetch style info from.
|
|
* @return {Object} Dictionary consisting of the styles that were found.
|
|
*/
|
|
_getRangeFontStyle(range) {
|
|
let node = range.startContainer;
|
|
while (node.nodeType != 1)
|
|
node = node.parentNode;
|
|
let style = node.ownerDocument.defaultView.getComputedStyle(node, "");
|
|
let props = {};
|
|
for (let prop of kFontPropsCamelCase) {
|
|
if (prop in style && style[prop])
|
|
props[prop] = style[prop];
|
|
}
|
|
return props;
|
|
},
|
|
|
|
/**
|
|
* Utility; transform a dictionary object as returned by `_getRangeFontStyle`
|
|
* above into a HTML style attribute value.
|
|
*
|
|
* @param {Object} fontStyle
|
|
* @return {String}
|
|
*/
|
|
_getHTMLFontStyle(fontStyle) {
|
|
let style = [];
|
|
for (let prop of Object.getOwnPropertyNames(fontStyle)) {
|
|
let idx = kFontPropsCamelCase.indexOf(prop);
|
|
if (idx == -1)
|
|
continue;
|
|
style.push(`${kFontPropsCSS[idx]}: ${fontStyle[prop]}`);
|
|
}
|
|
return style.join("; ");
|
|
},
|
|
|
|
/**
|
|
* Transform a style definition array as defined in `kModalStyles` into a CSS
|
|
* string that can be used to set the 'style' property of a DOM node.
|
|
*
|
|
* @param {Array} stylePairs Two-dimensional array of style pairs
|
|
* @param {...Array} [additionalStyles] Optional set of style pairs that will
|
|
* augment or override the styles defined
|
|
* by `stylePairs`
|
|
* @return {String}
|
|
*/
|
|
_getStyleString(stylePairs, ...additionalStyles) {
|
|
let baseStyle = new Map(stylePairs);
|
|
for (let additionalStyle of additionalStyles) {
|
|
for (let [prop, value] of additionalStyle)
|
|
baseStyle.set(prop, value);
|
|
}
|
|
return [...baseStyle].map(([cssProp, cssVal]) => `${cssProp}: ${cssVal}`).join("; ");
|
|
},
|
|
|
|
/**
|
|
* Checks whether a CSS RGB color value can be classified as being 'bright'.
|
|
*
|
|
* @param {String} cssColor RGB color value in the default format rgb[a](r,g,b)
|
|
* @return {Boolean}
|
|
*/
|
|
_isColorBright(cssColor) {
|
|
cssColor = cssColor.match(kRGBRE);
|
|
if (!cssColor || !cssColor.length)
|
|
return false;
|
|
cssColor.shift();
|
|
return new Color(...cssColor).isBright;
|
|
},
|
|
|
|
/**
|
|
* Detects if the overall text color in the page can be described as bright.
|
|
* This is done according to the following algorithm:
|
|
* 1. With the entire set of ranges that we have found thusfar;
|
|
* 2. Get an odd-numbered `sampleSize`, with a maximum of `kBrightTextSampleSize`
|
|
* ranges,
|
|
* 3. Slice the set of ranges into `sampleSize` number of equal parts,
|
|
* 4. Grab the first range for each slice and inspect the brightness of the
|
|
* color of its text content.
|
|
* 5. When the majority of ranges are counted as contain bright colored text,
|
|
* the page is considered to contain bright text overall.
|
|
*
|
|
* @param {Object} dict Dictionary of properties belonging to the
|
|
* currently active window. The page text color property
|
|
* will be recorded in `dict.brightText` as `true` or `false`.
|
|
*/
|
|
_detectBrightText(dict) {
|
|
let sampleSize = Math.min(dict.modalHighlightRectsMap.size, kBrightTextSampleSize);
|
|
let ranges = [...dict.modalHighlightRectsMap.keys()];
|
|
let rangesCount = ranges.length;
|
|
// Make sure the sample size is an odd number.
|
|
if (sampleSize % 2 == 0) {
|
|
// Make the currently found range weigh heavier.
|
|
if (dict.currentFoundRange) {
|
|
ranges.push(dict.currentFoundRange);
|
|
++sampleSize;
|
|
++rangesCount;
|
|
} else {
|
|
--sampleSize;
|
|
}
|
|
}
|
|
let brightCount = 0;
|
|
for (let i = 0; i < sampleSize; ++i) {
|
|
let range = ranges[Math.floor((rangesCount / sampleSize) * i)];
|
|
let fontStyle = this._getRangeFontStyle(range);
|
|
if (this._isColorBright(fontStyle.color))
|
|
++brightCount;
|
|
}
|
|
|
|
dict.brightText = (brightCount >= Math.ceil(sampleSize / 2));
|
|
},
|
|
|
|
/**
|
|
* Checks if a range is inside a DOM node that's positioned in a way that it
|
|
* doesn't scroll along when the document is scrolled and/ or zoomed. This
|
|
* is the case for 'fixed' and 'sticky' positioned elements, elements inside
|
|
* (i)frames and elements that have their overflow styles set to 'auto' or
|
|
* 'scroll'.
|
|
*
|
|
* @param {nsIDOMRange} range Range that be enclosed in a dynamic container
|
|
* @return {Boolean}
|
|
*/
|
|
_isInDynamicContainer(range) {
|
|
const kFixed = new Set(["fixed", "sticky", "scroll", "auto"]);
|
|
let node = range.startContainer;
|
|
while (node.nodeType != 1)
|
|
node = node.parentNode;
|
|
let document = node.ownerDocument;
|
|
let window = document.defaultView;
|
|
let dict = this.getForWindow(window.top);
|
|
|
|
// Check if we're in a frameset (including iframes).
|
|
if (window != window.top) {
|
|
if (!dict.frames.has(window))
|
|
dict.frames.set(window, null);
|
|
return true;
|
|
}
|
|
|
|
do {
|
|
let style = window.getComputedStyle(node, null);
|
|
if (kFixed.has(style.position) || kFixed.has(style.overflow) ||
|
|
kFixed.has(style.overflowX) || kFixed.has(style.overflowY)) {
|
|
return true;
|
|
}
|
|
node = node.parentNode;
|
|
} while (node && node != document.documentElement)
|
|
|
|
return false;
|
|
},
|
|
|
|
/**
|
|
* Read and store the rectangles that encompass the entire region of a range
|
|
* for use by the drawing function of the highlighter.
|
|
*
|
|
* @param {nsIDOMRange} range Range to fetch the rectangles from
|
|
* @param {Object} [dict] Dictionary of properties belonging to
|
|
* the currently active window
|
|
* @return {Set} Set of rects that were found for the range
|
|
*/
|
|
_getRangeRects(range, dict = null) {
|
|
let window = range.startContainer.ownerDocument.defaultView;
|
|
let bounds;
|
|
// If the window is part of a frameset, try to cache the bounds query.
|
|
if (dict && dict.frames.has(window)) {
|
|
bounds = dict.frames.get(window);
|
|
if (!bounds) {
|
|
bounds = this._getRootBounds(window);
|
|
dict.frames.set(window, bounds);
|
|
}
|
|
} else
|
|
bounds = this._getRootBounds(window);
|
|
|
|
let topBounds = this._getRootBounds(window.top, false);
|
|
let rects = new Set();
|
|
// A range may consist of multiple rectangles, we can also do these kind of
|
|
// precise cut-outs. range.getBoundingClientRect() returns the fully
|
|
// encompassing rectangle, which is too much for our purpose here.
|
|
for (let rect of range.getClientRects()) {
|
|
rect = Rect.fromRect(rect);
|
|
rect.x += bounds.x;
|
|
rect.y += bounds.y;
|
|
// If the rect is not even visible from the top document, we can ignore it.
|
|
if (rect.intersects(topBounds))
|
|
rects.add(rect);
|
|
}
|
|
return rects;
|
|
},
|
|
|
|
/**
|
|
* Read and store the rectangles that encompass the entire region of a range
|
|
* for use by the drawing function of the highlighter and store them in the
|
|
* cache.
|
|
*
|
|
* @param {nsIDOMRange} range Range to fetch the rectangles from
|
|
* @param {Boolean} [checkIfDynamic] Whether we should check if the range
|
|
* is dynamic as per the rules in
|
|
* `_isInDynamicContainer()`. Optional,
|
|
* defaults to `true`
|
|
* @param {Object} [dict] Dictionary of properties belonging to
|
|
* the currently active window
|
|
* @return {Set} Set of rects that were found for the range
|
|
*/
|
|
_updateRangeRects(range, checkIfDynamic = true, dict = null) {
|
|
let window = range.startContainer.ownerDocument.defaultView;
|
|
let rects = this._getRangeRects(range, dict);
|
|
|
|
// Only fetch the rect at this point, if not passed in as argument.
|
|
dict = dict || this.getForWindow(window.top);
|
|
dict.modalHighlightRectsMap.set(range, rects);
|
|
if (checkIfDynamic && this._isInDynamicContainer(range))
|
|
dict.dynamicRangesSet.add(range);
|
|
return rects;
|
|
},
|
|
|
|
/**
|
|
* Re-read the rectangles of the ranges that we keep track of separately,
|
|
* because they're enclosed by a position: fixed container DOM node or (i)frame.
|
|
*
|
|
* @param {Object} dict Dictionary of properties belonging to the currently
|
|
* active window
|
|
*/
|
|
_updateDynamicRangesRects(dict) {
|
|
// Reset the frame bounds cache.
|
|
for (let frame of dict.frames.keys())
|
|
dict.frames.set(frame, null);
|
|
for (let range of dict.dynamicRangesSet)
|
|
this._updateRangeRects(range, false, dict);
|
|
},
|
|
|
|
/**
|
|
* Update the content, position and style of the yellow current found range
|
|
* outline that floats atop the mask with the dimmed background.
|
|
* Rebuild it, if necessary, This will deactivate the animation between
|
|
* occurrences.
|
|
*
|
|
* @param {Object} dict Dictionary of properties belonging to the
|
|
* currently active window
|
|
* @param {Array} [textContent] Array of text that's inside the range. Optional,
|
|
* defaults to `null`
|
|
* @param {Object} [fontStyle] Dictionary of CSS styles in camelCase as
|
|
* returned by `_getRangeFontStyle()`. Optional
|
|
*/
|
|
_updateRangeOutline(dict, textContent = null, fontStyle = null) {
|
|
let range = dict.currentFoundRange;
|
|
if (!range)
|
|
return;
|
|
|
|
fontStyle = fontStyle || this._getRangeFontStyle(range);
|
|
// Text color in the outline is determined by kModalStyles.
|
|
delete fontStyle.color;
|
|
|
|
let rects = this._getRangeRects(range);
|
|
textContent = textContent || this._getRangeContentArray(range);
|
|
|
|
let outlineAnonNode = dict.modalHighlightOutline;
|
|
let rectCount = rects.size;
|
|
// (re-)Building the outline is conditional and happens when one of the
|
|
// following conditions is met:
|
|
// 1. No outline nodes were built before, or
|
|
// 2. When the amount of rectangles to draw is different from before, or
|
|
// 3. When there's more than one rectangle to draw, because it's impossible
|
|
// to animate that consistently with AnonymousContent nodes.
|
|
let rebuildOutline = (!outlineAnonNode || rectCount !== dict.previousRangeRectsCount ||
|
|
rectCount != 1);
|
|
dict.previousRangeRectsCount = rectCount;
|
|
|
|
let window = range.startContainer.ownerDocument.defaultView.top;
|
|
let document = window.document;
|
|
// First see if we need to and can remove the previous outline nodes.
|
|
if (rebuildOutline && outlineAnonNode) {
|
|
if (kDebug) {
|
|
outlineAnonNode.remove();
|
|
} else {
|
|
try {
|
|
document.removeAnonymousContent(outlineAnonNode);
|
|
} catch (ex) {}
|
|
}
|
|
dict.modalHighlightOutline = null;
|
|
}
|
|
|
|
// Abort when there's no text to highlight.
|
|
if (!textContent.length)
|
|
return;
|
|
|
|
let outlineBox;
|
|
if (rebuildOutline) {
|
|
// Create the main (yellow) highlight outline box.
|
|
outlineBox = document.createElementNS(kNSHTML, "div");
|
|
outlineBox.setAttribute("id", kModalOutlineId);
|
|
}
|
|
|
|
const kModalOutlineTextId = kModalOutlineId + "-text";
|
|
let i = 0;
|
|
for (let rect of rects) {
|
|
// if the current rect is the last rect, then text is set to the rest of
|
|
// the textContent with single spaces injected between the text. Otherwise
|
|
// text is set to the current textContent for the matching rect.
|
|
let text = (i == rectCount - 1) ? textContent.slice(i).join(" ") : textContent[i];
|
|
++i;
|
|
let outlineStyle = this._getStyleString(kModalStyles.outlineNode, [
|
|
["top", rect.top + "px"],
|
|
["left", rect.left + "px"],
|
|
["height", rect.height + "px"],
|
|
["width", rect.width + "px"]
|
|
], kDebug ? kModalStyles.outlineNodeDebug : []);
|
|
fontStyle.lineHeight = rect.height + "px";
|
|
let textStyle = this._getStyleString(kModalStyles.outlineText) + "; " +
|
|
this._getHTMLFontStyle(fontStyle);
|
|
|
|
if (rebuildOutline) {
|
|
let textBoxParent = (rectCount == 1) ? outlineBox :
|
|
outlineBox.appendChild(document.createElementNS(kNSHTML, "div"));
|
|
textBoxParent.setAttribute("style", outlineStyle);
|
|
|
|
let textBox = document.createElementNS(kNSHTML, "span");
|
|
if (rectCount == 1)
|
|
textBox.setAttribute("id", kModalOutlineTextId);
|
|
textBox.setAttribute("style", textStyle);
|
|
textBox.textContent = text;
|
|
textBoxParent.appendChild(textBox);
|
|
} else {
|
|
// Set the appropriate properties on the existing nodes, which will also
|
|
// activate the transitions.
|
|
outlineAnonNode.setAttributeForElement(kModalOutlineId, "style", outlineStyle);
|
|
outlineAnonNode.setAttributeForElement(kModalOutlineTextId, "style", textStyle);
|
|
outlineAnonNode.setTextContentForElement(kModalOutlineTextId, text);
|
|
}
|
|
}
|
|
|
|
if (rebuildOutline) {
|
|
dict.modalHighlightOutline = kDebug ?
|
|
mockAnonymousContentNode((document.body ||
|
|
document.documentElement).appendChild(outlineBox)) :
|
|
document.insertAnonymousContent(outlineBox);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Add a range to the list of ranges to highlight on, or cut out of, the dimmed
|
|
* background.
|
|
*
|
|
* @param {nsIDOMRange} range Range object that should be inspected
|
|
* @param {nsIDOMWindow} window Window object, whose DOM tree is being traversed
|
|
*/
|
|
_modalHighlight(range, controller, window) {
|
|
if (!this._getRangeContentArray(range).length)
|
|
return;
|
|
|
|
this._updateRangeRects(range);
|
|
|
|
this.show(window);
|
|
// We don't repaint the mask right away, but pass it off to a render loop of
|
|
// sorts.
|
|
this._scheduleRepaintOfMask(window);
|
|
},
|
|
|
|
/**
|
|
* Lazily insert the nodes we need as anonymous content into the CanvasFrame
|
|
* of a window.
|
|
*
|
|
* @param {nsIDOMWindow} window Window to draw in.
|
|
*/
|
|
_maybeCreateModalHighlightNodes(window) {
|
|
window = window.top;
|
|
let dict = this.getForWindow(window);
|
|
if (dict.modalHighlightOutline) {
|
|
if (!dict.modalHighlightAllMask) {
|
|
// Make sure to at least show the dimmed background.
|
|
this._repaintHighlightAllMask(window, false);
|
|
this._scheduleRepaintOfMask(window);
|
|
} else {
|
|
this._scheduleRepaintOfMask(window, { scrollOnly: true });
|
|
}
|
|
return;
|
|
}
|
|
|
|
let document = window.document;
|
|
// A hidden document doesn't accept insertAnonymousContent calls yet.
|
|
if (document.hidden) {
|
|
let onVisibilityChange = () => {
|
|
document.removeEventListener("visibilitychange", onVisibilityChange);
|
|
this._maybeCreateModalHighlightNodes(window);
|
|
};
|
|
document.addEventListener("visibilitychange", onVisibilityChange);
|
|
return;
|
|
}
|
|
|
|
this._updateRangeOutline(dict);
|
|
|
|
// Make sure to at least show the dimmed background.
|
|
this._repaintHighlightAllMask(window, false);
|
|
},
|
|
|
|
/**
|
|
* Build and draw the mask that takes care of the dimmed background that
|
|
* overlays the current page and the mask that cuts out all the rectangles of
|
|
* the ranges that were found.
|
|
*
|
|
* @param {nsIDOMWindow} window Window to draw in.
|
|
* @param {Boolean} [paintContent]
|
|
*/
|
|
_repaintHighlightAllMask(window, paintContent = true) {
|
|
window = window.top;
|
|
let dict = this.getForWindow(window);
|
|
|
|
const kMaskId = kModalIdPrefix + "-findbar-modalHighlight-outlineMask";
|
|
if (!dict.modalHighlightAllMask) {
|
|
let document = window.document;
|
|
let maskNode = document.createElementNS(kNSHTML, "div");
|
|
maskNode.setAttribute("id", kMaskId);
|
|
dict.modalHighlightAllMask = kDebug ?
|
|
mockAnonymousContentNode((document.body || document.documentElement).appendChild(maskNode)) :
|
|
document.insertAnonymousContent(maskNode);
|
|
}
|
|
|
|
// Make sure the dimmed mask node takes the full width and height that's available.
|
|
let {width, height} = dict.lastWindowDimensions = this._getWindowDimensions(window);
|
|
if (typeof dict.brightText != "boolean" || dict.updateAllRanges)
|
|
this._detectBrightText(dict);
|
|
let maskStyle = this._getStyleString(kModalStyles.maskNode,
|
|
[ ["width", width + "px"], ["height", height + "px"] ],
|
|
dict.brightText ? kModalStyles.maskNodeBrightText : [],
|
|
kDebug ? kModalStyles.maskNodeDebug : []);
|
|
dict.modalHighlightAllMask.setAttributeForElement(kMaskId, "style", maskStyle);
|
|
if (dict.brightText)
|
|
dict.modalHighlightAllMask.setAttributeForElement(kMaskId, "brighttext", "true");
|
|
|
|
let allRects = [];
|
|
if (paintContent || dict.modalHighlightAllMask) {
|
|
this._updateRangeOutline(dict);
|
|
this._updateDynamicRangesRects(dict);
|
|
|
|
let DOMRect = window.DOMRect;
|
|
for (let [range, rects] of dict.modalHighlightRectsMap) {
|
|
if (dict.updateAllRanges)
|
|
rects = this._updateRangeRects(range);
|
|
if (this._checkOverlap(dict.currentFoundRange, range))
|
|
continue;
|
|
for (let rect of rects)
|
|
allRects.push(new DOMRect(rect.x, rect.y, rect.width, rect.height));
|
|
}
|
|
dict.updateAllRanges = false;
|
|
}
|
|
|
|
dict.modalHighlightAllMask.setCutoutRectsForElement(kMaskId, allRects);
|
|
},
|
|
|
|
/**
|
|
* Safely remove the mask AnoymousContent node from the CanvasFrame.
|
|
*
|
|
* @param {nsIDOMWindow} window
|
|
*/
|
|
_removeHighlightAllMask(window) {
|
|
window = window.top;
|
|
let dict = this.getForWindow(window);
|
|
if (!dict.modalHighlightAllMask)
|
|
return;
|
|
|
|
// If the current window isn't the one the content was inserted into, this
|
|
// will fail, but that's fine.
|
|
if (kDebug) {
|
|
dict.modalHighlightAllMask.remove();
|
|
} else {
|
|
try {
|
|
window.document.removeAnonymousContent(dict.modalHighlightAllMask);
|
|
} catch (ex) {}
|
|
}
|
|
dict.modalHighlightAllMask = null;
|
|
},
|
|
|
|
/**
|
|
* Doing a full repaint each time a range is delivered by the highlight iterator
|
|
* is way too costly, thus we pipe the frequency down to every
|
|
* `kModalHighlightRepaintLoFreqMs` milliseconds. If there are dynamic ranges
|
|
* found (see `_isInDynamicContainer()` for the definition), the frequency
|
|
* will be upscaled to `kModalHighlightRepaintHiFreqMs`.
|
|
*
|
|
* @param {nsIDOMWindow} window
|
|
* @param {Object} options Dictionary of painter hints that contains the
|
|
* following properties:
|
|
* {Boolean} contentChanged Whether the documents' content changed in the
|
|
* meantime. This happens when the DOM is updated
|
|
* whilst the page is loaded.
|
|
* {Boolean} scrollOnly TRUE when the page has scrolled in the meantime,
|
|
* which means that the dynamically positioned
|
|
* elements need to be repainted.
|
|
* {Boolean} updateAllRanges Whether to recalculate the rects of all ranges
|
|
* that were found up until now.
|
|
*/
|
|
_scheduleRepaintOfMask(window, { contentChanged, scrollOnly, updateAllRanges } =
|
|
{ contentChanged: false, scrollOnly: false, updateAllRanges: false }) {
|
|
if (!this._modal)
|
|
return;
|
|
|
|
window = window.top;
|
|
let dict = this.getForWindow(window);
|
|
let hasDynamicRanges = !!dict.dynamicRangesSet.size;
|
|
let repaintDynamicRanges = ((scrollOnly || contentChanged) && hasDynamicRanges);
|
|
|
|
// When we request to repaint unconditionally, we mean to call
|
|
// `_repaintHighlightAllMask()` right after the timeout.
|
|
if (!dict.unconditionalRepaintRequested)
|
|
dict.unconditionalRepaintRequested = !contentChanged || repaintDynamicRanges;
|
|
// Some events, like a resize, call for recalculation of all the rects of all ranges.
|
|
if (!dict.updateAllRanges)
|
|
dict.updateAllRanges = updateAllRanges;
|
|
|
|
if (dict.modalRepaintScheduler)
|
|
return;
|
|
|
|
dict.modalRepaintScheduler = window.setTimeout(() => {
|
|
dict.modalRepaintScheduler = null;
|
|
|
|
let { width: previousWidth, height: previousHeight } = dict.lastWindowDimensions;
|
|
let { width, height } = dict.lastWindowDimensions = this._getWindowDimensions(window);
|
|
let pageContentChanged = (Math.abs(previousWidth - width) > kContentChangeThresholdPx ||
|
|
Math.abs(previousHeight - height) > kContentChangeThresholdPx);
|
|
// When the page has changed significantly enough in size, we'll restart
|
|
// the iterator with the same parameters as before to find us new ranges.
|
|
if (pageContentChanged)
|
|
this.iterator.restart(this.finder);
|
|
|
|
if (dict.unconditionalRepaintRequested ||
|
|
(dict.modalHighlightRectsMap.size && pageContentChanged)) {
|
|
dict.unconditionalRepaintRequested = false;
|
|
this._repaintHighlightAllMask(window);
|
|
}
|
|
}, hasDynamicRanges ? kModalHighlightRepaintHiFreqMs : kModalHighlightRepaintLoFreqMs);
|
|
},
|
|
|
|
/**
|
|
* Add event listeners to the content which will cause the modal highlight
|
|
* AnonymousContent to be re-painted or hidden.
|
|
*
|
|
* @param {nsIDOMWindow} window
|
|
*/
|
|
_addModalHighlightListeners(window) {
|
|
window = window.top;
|
|
let dict = this.getForWindow(window);
|
|
if (dict.highlightListeners)
|
|
return;
|
|
|
|
window = window.top;
|
|
dict.highlightListeners = [
|
|
this._scheduleRepaintOfMask.bind(this, window, { contentChanged: true }),
|
|
this._scheduleRepaintOfMask.bind(this, window, { updateAllRanges: true }),
|
|
this._scheduleRepaintOfMask.bind(this, window, { scrollOnly: true }),
|
|
this.hide.bind(this, window, null)
|
|
];
|
|
let target = this.iterator._getDocShell(window).chromeEventHandler;
|
|
target.addEventListener("MozAfterPaint", dict.highlightListeners[0]);
|
|
target.addEventListener("resize", dict.highlightListeners[1]);
|
|
target.addEventListener("scroll", dict.highlightListeners[2]);
|
|
target.addEventListener("click", dict.highlightListeners[3]);
|
|
},
|
|
|
|
/**
|
|
* Remove event listeners from content.
|
|
*
|
|
* @param {nsIDOMWindow} window
|
|
*/
|
|
_removeModalHighlightListeners(window) {
|
|
window = window.top;
|
|
let dict = this.getForWindow(window);
|
|
if (!dict.highlightListeners)
|
|
return;
|
|
|
|
let target = this.iterator._getDocShell(window).chromeEventHandler;
|
|
target.removeEventListener("MozAfterPaint", dict.highlightListeners[0]);
|
|
target.removeEventListener("resize", dict.highlightListeners[1]);
|
|
target.removeEventListener("scroll", dict.highlightListeners[2]);
|
|
target.removeEventListener("click", dict.highlightListeners[3]);
|
|
|
|
dict.highlightListeners = null;
|
|
},
|
|
|
|
/**
|
|
* For a given node returns its editable parent or null if there is none.
|
|
* It's enough to check if node is a text node and its parent's parent is
|
|
* instance of nsIDOMNSEditableElement.
|
|
*
|
|
* @param node the node we want to check
|
|
* @returns the first node in the parent chain that is editable,
|
|
* null if there is no such node
|
|
*/
|
|
_getEditableNode(node) {
|
|
if (node.nodeType === node.TEXT_NODE && node.parentNode && node.parentNode.parentNode &&
|
|
node.parentNode.parentNode instanceof Ci.nsIDOMNSEditableElement) {
|
|
return node.parentNode.parentNode;
|
|
}
|
|
return null;
|
|
},
|
|
|
|
/**
|
|
* Add ourselves as an nsIEditActionListener and nsIDocumentStateListener for
|
|
* a given editor
|
|
*
|
|
* @param editor the editor we'd like to listen to
|
|
*/
|
|
_addEditorListeners(editor) {
|
|
if (!this._editors) {
|
|
this._editors = [];
|
|
this._stateListeners = [];
|
|
}
|
|
|
|
let existingIndex = this._editors.indexOf(editor);
|
|
if (existingIndex == -1) {
|
|
let x = this._editors.length;
|
|
this._editors[x] = editor;
|
|
this._stateListeners[x] = this._createStateListener();
|
|
this._editors[x].addEditActionListener(this);
|
|
this._editors[x].addDocumentStateListener(this._stateListeners[x]);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Helper method to unhook listeners, remove cached editors
|
|
* and keep the relevant arrays in sync
|
|
*
|
|
* @param idx the index into the array of editors/state listeners
|
|
* we wish to remove
|
|
*/
|
|
_unhookListenersAtIndex(idx) {
|
|
this._editors[idx].removeEditActionListener(this);
|
|
this._editors[idx]
|
|
.removeDocumentStateListener(this._stateListeners[idx]);
|
|
this._editors.splice(idx, 1);
|
|
this._stateListeners.splice(idx, 1);
|
|
if (!this._editors.length) {
|
|
delete this._editors;
|
|
delete this._stateListeners;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Remove ourselves as an nsIEditActionListener and
|
|
* nsIDocumentStateListener from a given cached editor
|
|
*
|
|
* @param editor the editor we no longer wish to listen to
|
|
*/
|
|
_removeEditorListeners(editor) {
|
|
// editor is an editor that we listen to, so therefore must be
|
|
// cached. Find the index of this editor
|
|
let idx = this._editors.indexOf(editor);
|
|
if (idx == -1) {
|
|
return;
|
|
}
|
|
// Now unhook ourselves, and remove our cached copy
|
|
this._unhookListenersAtIndex(idx);
|
|
},
|
|
|
|
/*
|
|
* nsIEditActionListener logic follows
|
|
*
|
|
* We implement this interface to allow us to catch the case where
|
|
* the findbar found a match in a HTML <input> or <textarea>. If the
|
|
* user adjusts the text in some way, it will no longer match, so we
|
|
* want to remove the highlight, rather than have it expand/contract
|
|
* when letters are added or removed.
|
|
*/
|
|
|
|
/**
|
|
* Helper method used to check whether a selection intersects with
|
|
* some highlighting
|
|
*
|
|
* @param selectionRange the range from the selection to check
|
|
* @param findRange the highlighted range to check against
|
|
* @returns true if they intersect, false otherwise
|
|
*/
|
|
_checkOverlap(selectionRange, findRange) {
|
|
if (!selectionRange || !findRange)
|
|
return false;
|
|
// The ranges overlap if one of the following is true:
|
|
// 1) At least one of the endpoints of the deleted selection
|
|
// is in the find selection
|
|
// 2) At least one of the endpoints of the find selection
|
|
// is in the deleted selection
|
|
if (findRange.isPointInRange(selectionRange.startContainer,
|
|
selectionRange.startOffset))
|
|
return true;
|
|
if (findRange.isPointInRange(selectionRange.endContainer,
|
|
selectionRange.endOffset))
|
|
return true;
|
|
if (selectionRange.isPointInRange(findRange.startContainer,
|
|
findRange.startOffset))
|
|
return true;
|
|
if (selectionRange.isPointInRange(findRange.endContainer,
|
|
findRange.endOffset))
|
|
return true;
|
|
|
|
return false;
|
|
},
|
|
|
|
/**
|
|
* Helper method to determine if an edit occurred within a highlight
|
|
*
|
|
* @param selection the selection we wish to check
|
|
* @param node the node we want to check is contained in selection
|
|
* @param offset the offset into node that we want to check
|
|
* @returns the range containing (node, offset) or null if no ranges
|
|
* in the selection contain it
|
|
*/
|
|
_findRange(selection, node, offset) {
|
|
let rangeCount = selection.rangeCount;
|
|
let rangeidx = 0;
|
|
let foundContainingRange = false;
|
|
let range = null;
|
|
|
|
// Check to see if this node is inside one of the selection's ranges
|
|
while (!foundContainingRange && rangeidx < rangeCount) {
|
|
range = selection.getRangeAt(rangeidx);
|
|
if (range.isPointInRange(node, offset)) {
|
|
foundContainingRange = true;
|
|
break;
|
|
}
|
|
rangeidx++;
|
|
}
|
|
|
|
if (foundContainingRange) {
|
|
return range;
|
|
}
|
|
|
|
return null;
|
|
},
|
|
|
|
// Start of nsIEditActionListener implementations
|
|
|
|
WillDeleteText(textNode, offset, length) {
|
|
let editor = this._getEditableNode(textNode).editor;
|
|
let controller = editor.selectionController;
|
|
let fSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
let range = this._findRange(fSelection, textNode, offset);
|
|
|
|
if (range) {
|
|
// Don't remove the highlighting if the deleted text is at the
|
|
// end of the range
|
|
if (textNode != range.endContainer ||
|
|
offset != range.endOffset) {
|
|
// Text within the highlight is being removed - the text can
|
|
// no longer be a match, so remove the highlighting
|
|
fSelection.removeRange(range);
|
|
if (fSelection.rangeCount == 0) {
|
|
this._removeEditorListeners(editor);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
DidInsertText(textNode, offset, aString) {
|
|
let editor = this._getEditableNode(textNode).editor;
|
|
let controller = editor.selectionController;
|
|
let fSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
let range = this._findRange(fSelection, textNode, offset);
|
|
|
|
if (range) {
|
|
// If the text was inserted before the highlight
|
|
// adjust the highlight's bounds accordingly
|
|
if (textNode == range.startContainer &&
|
|
offset == range.startOffset) {
|
|
range.setStart(range.startContainer,
|
|
range.startOffset+aString.length);
|
|
} else if (textNode != range.endContainer ||
|
|
offset != range.endOffset) {
|
|
// The edit occurred within the highlight - any addition of text
|
|
// will result in the text no longer being a match,
|
|
// so remove the highlighting
|
|
fSelection.removeRange(range);
|
|
if (fSelection.rangeCount == 0) {
|
|
this._removeEditorListeners(editor);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
WillDeleteSelection(selection) {
|
|
let editor = this._getEditableNode(selection.getRangeAt(0)
|
|
.startContainer).editor;
|
|
let controller = editor.selectionController;
|
|
let fSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
|
|
|
|
let selectionIndex = 0;
|
|
let findSelectionIndex = 0;
|
|
let shouldDelete = {};
|
|
let numberOfDeletedSelections = 0;
|
|
let numberOfMatches = fSelection.rangeCount;
|
|
|
|
// We need to test if any ranges in the deleted selection (selection)
|
|
// are in any of the ranges of the find selection
|
|
// Usually both selections will only contain one range, however
|
|
// either may contain more than one.
|
|
|
|
for (let fIndex = 0; fIndex < numberOfMatches; fIndex++) {
|
|
shouldDelete[fIndex] = false;
|
|
let fRange = fSelection.getRangeAt(fIndex);
|
|
|
|
for (let index = 0; index < selection.rangeCount; index++) {
|
|
if (shouldDelete[fIndex]) {
|
|
continue;
|
|
}
|
|
|
|
let selRange = selection.getRangeAt(index);
|
|
let doesOverlap = this._checkOverlap(selRange, fRange);
|
|
if (doesOverlap) {
|
|
shouldDelete[fIndex] = true;
|
|
numberOfDeletedSelections++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// OK, so now we know what matches (if any) are in the selection
|
|
// that is being deleted. Time to remove them.
|
|
if (!numberOfDeletedSelections) {
|
|
return;
|
|
}
|
|
|
|
for (let i = numberOfMatches - 1; i >= 0; i--) {
|
|
if (shouldDelete[i])
|
|
fSelection.removeRange(fSelection.getRangeAt(i));
|
|
}
|
|
|
|
// Remove listeners if no more highlights left
|
|
if (!fSelection.rangeCount) {
|
|
this._removeEditorListeners(editor);
|
|
}
|
|
},
|
|
|
|
/*
|
|
* nsIDocumentStateListener logic follows
|
|
*
|
|
* When attaching nsIEditActionListeners, there are no guarantees
|
|
* as to whether the findbar or the documents in the browser will get
|
|
* destructed first. This leads to the potential to either leak, or to
|
|
* hold on to a reference an editable element's editor for too long,
|
|
* preventing it from being destructed.
|
|
*
|
|
* However, when an editor's owning node is being destroyed, the editor
|
|
* sends out a DocumentWillBeDestroyed notification. We can use this to
|
|
* clean up our references to the object, to allow it to be destroyed in a
|
|
* timely fashion.
|
|
*/
|
|
|
|
/**
|
|
* Unhook ourselves when one of our state listeners has been called.
|
|
* This can happen in 4 cases:
|
|
* 1) The document the editor belongs to is navigated away from, and
|
|
* the document is not being cached
|
|
*
|
|
* 2) The document the editor belongs to is expired from the cache
|
|
*
|
|
* 3) The tab containing the owning document is closed
|
|
*
|
|
* 4) The <input> or <textarea> that owns the editor is explicitly
|
|
* removed from the DOM
|
|
*
|
|
* @param the listener that was invoked
|
|
*/
|
|
_onEditorDestruction(aListener) {
|
|
// First find the index of the editor the given listener listens to.
|
|
// The listeners and editors arrays must always be in sync.
|
|
// The listener will be in our array of cached listeners, as this
|
|
// method could not have been called otherwise.
|
|
let idx = 0;
|
|
while (this._stateListeners[idx] != aListener) {
|
|
idx++;
|
|
}
|
|
|
|
// Unhook both listeners
|
|
this._unhookListenersAtIndex(idx);
|
|
},
|
|
|
|
/**
|
|
* Creates a unique document state listener for an editor.
|
|
*
|
|
* It is not possible to simply have the findbar implement the
|
|
* listener interface itself, as it wouldn't have sufficient information
|
|
* to work out which editor was being destroyed. Therefore, we create new
|
|
* listeners on the fly, and cache them in sync with the editors they
|
|
* listen to.
|
|
*/
|
|
_createStateListener() {
|
|
return {
|
|
findbar: this,
|
|
|
|
QueryInterface: function(iid) {
|
|
if (iid.equals(Ci.nsIDocumentStateListener) ||
|
|
iid.equals(Ci.nsISupports))
|
|
return this;
|
|
|
|
throw Components.results.NS_ERROR_NO_INTERFACE;
|
|
},
|
|
|
|
NotifyDocumentWillBeDestroyed: function() {
|
|
this.findbar._onEditorDestruction(this);
|
|
},
|
|
|
|
// Unimplemented
|
|
notifyDocumentCreated: function() {},
|
|
notifyDocumentStateChanged: function(aDirty) {}
|
|
};
|
|
}
|
|
};
|