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Copy pathFinderHighlighter.jsm
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FinderHighlighter.jsm
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
this.EXPORTED_SYMBOLS = ["FinderHighlighter"];
const { interfaces: Ci, utils: Cu } = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Color", "resource://gre/modules/Color.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Rect", "resource://gre/modules/Geometry.jsm");
XPCOMUtils.defineLazyGetter(this, "kDebug", () => {
const kDebugPref = "findbar.modalHighlight.debug";
return Services.prefs.getPrefType(kDebugPref) && Services.prefs.getBoolPref(kDebugPref);
});
const kContentChangeThresholdPx = 5;
const kBrightTextSampleSize = 5;
// This limit is arbitrary and doesn't scale for low-powered machines or
// high-powered machines. Netbooks will probably need a much lower limit, for
// example. Though getting something out there is better than nothing.
const kPageIsTooBigPx = 500000;
const kModalHighlightRepaintLoFreqMs = 100;
const kModalHighlightRepaintHiFreqMs = 16;
const kHighlightAllPref = "findbar.highlightAll";
const kModalHighlightPref = "findbar.modalHighlight";
const kFontPropsCSS = ["color", "font-family", "font-kerning", "font-size",
"font-size-adjust", "font-stretch", "font-variant", "font-weight", "line-height",
"letter-spacing", "text-emphasis", "text-orientation", "text-transform", "word-spacing"];
const kFontPropsCamelCase = kFontPropsCSS.map(prop => {
let parts = prop.split("-");
return parts.shift() + parts.map(part => part.charAt(0).toUpperCase() + part.slice(1)).join("");
});
const kRGBRE = /^rgba?\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*/i;
// This uuid is used to prefix HTML element IDs in order to make them unique and
// hard to clash with IDs content authors come up with.
const kModalIdPrefix = "cedee4d0-74c5-4f2d-ab43-4d37c0f9d463";
const kModalOutlineId = kModalIdPrefix + "-findbar-modalHighlight-outline";
const kOutlineBoxColor = "255,197,53";
const kOutlineBoxBorderSize = 2;
const kOutlineBoxBorderRadius = 3;
const kModalStyles = {
outlineNode: [
["background-color", `rgb(${kOutlineBoxColor})`],
["background-clip", "padding-box"],
["border", `${kOutlineBoxBorderSize}px solid`],
["-moz-border-top-colors", `rgba(${kOutlineBoxColor},.1) rgba(${kOutlineBoxColor},.4) rgba(${kOutlineBoxColor},.7)`],
["-moz-border-right-colors", `rgba(${kOutlineBoxColor},.1) rgba(${kOutlineBoxColor},.4) rgba(${kOutlineBoxColor},.7)`],
["-moz-border-bottom-colors", `rgba(${kOutlineBoxColor},.1) rgba(${kOutlineBoxColor},.4) rgba(${kOutlineBoxColor},.7)`],
["-moz-border-left-colors", `rgba(${kOutlineBoxColor},.1) rgba(${kOutlineBoxColor},.4) rgba(${kOutlineBoxColor},.7)`],
["border-radius", `${kOutlineBoxBorderRadius}px`],
["box-shadow", `0 ${kOutlineBoxBorderSize}px 0 0 rgba(0,0,0,.1)`],
["color", "#000"],
["display", "-moz-box"],
["margin", `-${kOutlineBoxBorderSize}px 0 0 -${kOutlineBoxBorderSize}px !important`],
["overflow", "hidden"],
["pointer-events", "none"],
["position", "absolute"],
["white-space", "nowrap"],
["will-change", "transform"],
["z-index", 2]
],
outlineNodeDebug: [ ["z-index", 2147483647] ],
outlineText: [
["margin", "0 !important"],
["padding", "0 !important"],
["vertical-align", "top !important"]
],
maskNode: [
["background", "rgba(0,0,0,.25)"],
["pointer-events", "none"],
["position", "absolute"],
["z-index", 1]
],
maskNodeTransition: [
["transition", "background .2s ease-in"]
],
maskNodeDebug: [
["z-index", 2147483646],
["top", 0],
["left", 0]
],
maskNodeBrightText: [ ["background", "rgba(255,255,255,.25)"] ]
};
const kModalOutlineAnim = {
"keyframes": [
{ transform: "scaleX(1) scaleY(1)" },
{ transform: "scaleX(1.5) scaleY(1.5)", offset: .5, easing: "ease-in" },
{ transform: "scaleX(1) scaleY(1)" }
],
duration: 50,
};
const kNSHTML = "http://www.w3.org/1999/xhtml";
function mockAnonymousContentNode(domNode) {
return {
setTextContentForElement(id, text) {
(domNode.querySelector("#" + id) || domNode).textContent = text;
},
getAttributeForElement(id, attrName) {
let node = domNode.querySelector("#" + id) || domNode;
if (!node.hasAttribute(attrName))
return undefined;
return node.getAttribute(attrName);
},
setAttributeForElement(id, attrName, attrValue) {
(domNode.querySelector("#" + id) || domNode).setAttribute(attrName, attrValue);
},
removeAttributeForElement(id, attrName) {
let node = domNode.querySelector("#" + id) || domNode;
if (!node.hasAttribute(attrName))
return;
node.removeAttribute(attrName);
},
remove() {
try {
domNode.remove();
} catch (ex) {}
},
setAnimationForElement(id, keyframes, duration) {
return (domNode.querySelector("#" + id) || domNode).animate(keyframes, duration);
},
setCutoutRectsForElement(id, rects) {
// no-op for now.
}
};
}
let gWindows = new WeakMap();
/**
* FinderHighlighter class that is used by Finder.jsm to take care of the
* 'Highlight All' feature, which can highlight all find occurrences in a page.
*
* @param {Finder} finder Finder.jsm instance
*/
function FinderHighlighter(finder) {
this._highlightAll = Services.prefs.getBoolPref(kHighlightAllPref);
this._modal = Services.prefs.getBoolPref(kModalHighlightPref);
this.finder = finder;
}
FinderHighlighter.prototype = {
get iterator() {
if (this._iterator)
return this._iterator;
this._iterator = Cu.import("resource://gre/modules/FinderIterator.jsm", null).FinderIterator;
return this._iterator;
},
/**
* Each window is unique, globally, and the relation between an active
* highlighting session and a window is 1:1.
* For each window we track a number of properties which _at least_ consist of
* - {Boolean} detectedGeometryChange Whether the geometry of the found ranges'
* rectangles has changed substantially
* - {Set} dynamicRangesSet Set of ranges that may move around, depending
* on page layout changes and user input
* - {Map} frames Collection of frames that were encountered
* when inspecting the found ranges
* - {Map} modalHighlightRectsMap Collection of ranges and their corresponding
* Rects and texts
*
* @param {nsIDOMWindow} window
* @return {Object}
*/
getForWindow(window, propName = null) {
if (!gWindows.has(window)) {
gWindows.set(window, {
detectedGeometryChange: false,
dynamicRangesSet: new Set(),
frames: new Map(),
lastWindowDimensions: { width: 0, height: 0 },
modalHighlightRectsMap: new Map(),
previousRangeRectsAndTexts: { rectList: [], textList: [] }
});
}
return gWindows.get(window);
},
/**
* Notify all registered listeners that the 'Highlight All' operation finished.
*
* @param {Boolean} highlight Whether highlighting was turned on
*/
notifyFinished(highlight) {
for (let l of this.finder._listeners) {
try {
l.onHighlightFinished(highlight);
} catch (ex) {}
}
},
/**
* Toggle highlighting all occurrences of a word in a page. This method will
* be called recursively for each (i)frame inside a page.
*
* @param {Booolean} highlight Whether highlighting should be turned on
* @param {String} word Needle to search for and highlight when found
* @param {Boolean} linksOnly Only consider nodes that are links for the search
* @yield {Promise} that resolves once the operation has finished
*/
async highlight(highlight, word, linksOnly) {
let window = this.finder._getWindow();
let dict = this.getForWindow(window);
let controller = this.finder._getSelectionController(window);
let doc = window.document;
this._found = false;
if (!controller || !doc || !doc.documentElement) {
// Without the selection controller,
// we are unable to (un)highlight any matches
return;
}
if (highlight) {
let params = {
allowDistance: 1,
caseSensitive: this.finder._fastFind.caseSensitive,
entireWord: this.finder._fastFind.entireWord,
linksOnly, word,
finder: this.finder,
listener: this,
useCache: true,
window
};
if (this.iterator.isAlreadyRunning(params) ||
(this._modal && this.iterator._areParamsEqual(params, dict.lastIteratorParams))) {
return;
}
if (!this._modal)
dict.visible = true;
await this.iterator.start(params);
if (this._found)
this.finder._outlineLink(true);
} else {
this.hide(window);
// Removing the highlighting always succeeds, so return true.
this._found = true;
}
this.notifyFinished({ highlight, found: this._found });
},
// FinderIterator listener implementation
onIteratorRangeFound(range) {
this.highlightRange(range);
this._found = true;
},
onIteratorReset() {},
onIteratorRestart() {
this.clear(this.finder._getWindow());
},
onIteratorStart(params) {
let window = this.finder._getWindow();
let dict = this.getForWindow(window);
// Save a clean params set for use later in the `update()` method.
dict.lastIteratorParams = params;
if (!this._modal)
this.hide(window, this.finder._fastFind.getFoundRange());
this.clear(window);
},
/**
* Add a range to the find selection, i.e. highlight it, and if it's inside an
* editable node, track it.
*
* @param {nsIDOMRange} range Range object to be highlighted
*/
highlightRange(range) {
let node = range.startContainer;
let editableNode = this._getEditableNode(node);
let window = node.ownerGlobal;
let controller = this.finder._getSelectionController(window);
if (editableNode) {
controller = editableNode.editor.selectionController;
}
if (this._modal) {
this._modalHighlight(range, controller, window);
} else {
let findSelection = controller.getSelection(Ci.nsISelectionController.SELECTION_FIND);
findSelection.addRange(range);
// Check if the range is inside an iframe.
if (window != window.top) {
let dict = this.getForWindow(window.top);
if (!dict.frames.has(window))
dict.frames.set(window, null);
}
}
if (editableNode) {
// Highlighting added, so cache this editor, and hook up listeners
// to ensure we deal properly with edits within the highlighting
this._addEditorListeners(editableNode.editor);
}
},
/**
* If modal highlighting is enabled, show the dimmed background that will overlay
* the page.
*
* @param {nsIDOMWindow} window The dimmed background will overlay this window.
* Optional, defaults to the finder window.
*/
show(window = null) {
window = (window || this.finder._getWindow()).top;
let dict = this.getForWindow(window);
if (!this._modal || dict.visible)
return;
dict.visible = true;
this._maybeCreateModalHighlightNodes(window);
this._addModalHighlightListeners(window);
},
/**
* Clear all highlighted matches. If modal highlighting is enabled and
* the outline + dimmed background is currently visible, both will be hidden.
*
* @param {nsIDOMWindow} window The dimmed background will overlay this window.
* Optional, defaults to the finder window.
* @param {nsIDOMRange} skipRange A range that should not be removed from the
* find selection.
* @param {nsIDOMEvent} event When called from an event handler, this will
* be the triggering event.
*/
hide(window, skipRange = null, event = null) {
try {
window = window.top;
} catch (ex) {
Cu.reportError(ex);
return;
}
let dict = this.getForWindow(window);
let isBusySelecting = dict.busySelecting;
dict.busySelecting = false;
// Do not hide on anything but a left-click.
if (event && event.type == "click" && (event.button !== 0 || event.altKey ||
event.ctrlKey || event.metaKey || event.shiftKey || event.relatedTarget ||
isBusySelecting || (event.target.localName == "a" && event.target.href))) {
return;
}
this._clearSelection(this.finder._getSelectionController(window), skipRange);
for (let frame of dict.frames.keys())
this._clearSelection(this.finder._getSelectionController(frame), skipRange);
// Next, check our editor cache, for editors belonging to this
// document
if (this._editors) {
let doc = window.document;
for (let x = this._editors.length - 1; x >= 0; --x) {
if (this._editors[x].document == doc) {
this._clearSelection(this._editors[x].selectionController, skipRange);
// We don't need to listen to this editor any more
this._unhookListenersAtIndex(x);
}
}
}
if (dict.modalRepaintScheduler) {
window.clearTimeout(dict.modalRepaintScheduler);
dict.modalRepaintScheduler = null;
}
dict.lastWindowDimensions = { width: 0, height: 0 };
this._removeRangeOutline(window);
this._removeHighlightAllMask(window);
this._removeModalHighlightListeners(window);
dict.visible = false;
},
/**
* Called by the Finder after a find result comes in; update the position and
* content of the outline to the newly found occurrence.
* To make sure that the outline covers the found range completely, all the
* CSS styles that influence the text are copied and applied to the outline.
*
* @param {Object} data Dictionary coming from Finder that contains the
* following properties:
* {Number} result One of the nsITypeAheadFind.FIND_* constants
* indicating the result of a search operation.
* {Boolean} findBackwards If TRUE, the search was performed backwards,
* FALSE if forwards.
* {Boolean} findAgain If TRUE, the search was performed using the same
* search string as before.
* {String} linkURL If a link was hit, this will contain a URL string.
* {Rect} rect An object with top, left, width and height
* coordinates of the current selection.
* {String} searchString The string the search was performed with.
* {Boolean} storeResult Indicator if the search string should be stored
* by the consumer of the Finder.
*/
update(data) {
let window = this.finder._getWindow();
let dict = this.getForWindow(window);
let foundRange = this.finder._fastFind.getFoundRange();
if (data.result == Ci.nsITypeAheadFind.FIND_NOTFOUND || !data.searchString || !foundRange) {
this.hide(window);
return;
}
if (!this._modal) {
if (this._highlightAll) {
dict.previousFoundRange = dict.currentFoundRange;
dict.currentFoundRange = foundRange;
let params = this.iterator.params;
if (dict.visible && this.iterator._areParamsEqual(params, dict.lastIteratorParams))
return;
if (!dict.visible && !params)
params = {word: data.searchString, linksOnly: data.linksOnly};
if (params)
this.highlight(true, params.word, params.linksOnly);
}
return;
}
dict.animateOutline = true;
// Immediately finish running animations, if any.
this._finishOutlineAnimations(dict);
if (foundRange !== dict.currentFoundRange || data.findAgain) {
dict.previousFoundRange = dict.currentFoundRange;
dict.currentFoundRange = foundRange;
if (!dict.visible)
this.show(window);
else
this._maybeCreateModalHighlightNodes(window);
}
if (this._highlightAll)
this.highlight(true, data.searchString, data.linksOnly);
},
/**
* Invalidates the list by clearing the map of highlighted ranges that we
* keep to build the mask for.
*/
clear(window = null) {
if (!window || !window.top)
return;
let dict = this.getForWindow(window.top);
this._finishOutlineAnimations(dict);
dict.dynamicRangesSet.clear();
dict.frames.clear();
dict.modalHighlightRectsMap.clear();
dict.brightText = null;
},
/**
* When the current page is refreshed or navigated away from, the CanvasFrame
* contents is not valid anymore, i.e. all anonymous content is destroyed.
* We need to clear the references we keep, which'll make sure we redraw
* everything when the user starts to find in page again.
*/
onLocationChange() {
let window = this.finder._getWindow();
if (!window || !window.top)
return;
this.hide(window);
this.clear(window);
this._removeRangeOutline(window);
gWindows.delete(window.top);
},
/**
* When `kModalHighlightPref` pref changed during a session, this callback is
* invoked. When modal highlighting is turned off, we hide the CanvasFrame
* contents.
*
* @param {Boolean} useModalHighlight
*/
onModalHighlightChange(useModalHighlight) {
let window = this.finder._getWindow();
if (window && this._modal && !useModalHighlight) {
this.hide(window);
this.clear(window);
}
this._modal = useModalHighlight;
},
/**
* When 'Highlight All' is toggled during a session, this callback is invoked
* and when it's turned off, the found occurrences will be removed from the mask.
*
* @param {Boolean} highlightAll
*/
onHighlightAllChange(highlightAll) {
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 && window == window.top) {
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);
// If the current window is an iframe with scrolling="no" and its parent
// is also an iframe the scroll offsets from the parents' documentElement
// (inverse scroll position) needs to be subtracted from the parent
// window rect.
if (el.getAttribute("scrolling") == "no" && currWin != window.top) {
let docEl = currWin.document.documentElement;
parentRect.translate(-docEl.scrollLeft, -docEl.scrollTop);
}
}
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; 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.ownerGlobal.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 previously or currently found range weigh heavier.
if (dict.previousFoundRange || dict.currentFoundRange) {
ranges.push(dict.previousFoundRange || 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);
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
*/
_getRangeRectsAndTexts(range, dict = null) {
let window = range.startContainer.ownerGlobal;
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 = [];
// 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.
let {rectList, textList} = range.getClientRectsAndTexts();
for (let rect of rectList) {
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.push(rect);
}
return {rectList: rects, textList};
},
/**
* 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.ownerGlobal;
let rectsAndTexts = this._getRangeRectsAndTexts(range, dict);
// Only fetch the rect at this point, if not passed in as argument.
dict = dict || this.getForWindow(window.top);
let oldRectsAndTexts = dict.modalHighlightRectsMap.get(range);
dict.modalHighlightRectsMap.set(range, rectsAndTexts);
// Check here if we suddenly went down to zero rects from more than zero before,
// which indicates that we should re-iterate the document.
if (oldRectsAndTexts && oldRectsAndTexts.rectList.length && !rectsAndTexts.rectList.length)
dict.detectedGeometryChange = true;
if (checkIfDynamic && this._isInDynamicContainer(range))
dict.dynamicRangesSet.add(range);
return rectsAndTexts;
},
/**
* 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
*/
_updateRangeOutline(dict) {
let range = dict.currentFoundRange;
if (!range)
return;
let fontStyle = this._getRangeFontStyle(range);
// Text color in the outline is determined by kModalStyles.
delete fontStyle.color;
let rectsAndTexts = this._updateRangeRects(range, true, dict);
let outlineAnonNode = dict.modalHighlightOutline;
let rectCount = rectsAndTexts.rectList.length;
let previousRectCount = dict.previousRangeRectsAndTexts.rectList.length;
// (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 !== previousRectCount ||
rectCount != 1);
dict.previousRangeRectsAndTexts = rectsAndTexts;
let window = range.startContainer.ownerGlobal.top;
let document = window.document;
// First see if we need to and can remove the previous outline nodes.
if (rebuildOutline)
this._removeRangeOutline(window);
// Abort when there's no text to highlight OR when it's the exact same range
// as the previous call and isn't inside a dynamic container.
if (!rectsAndTexts.textList.length ||
(!rebuildOutline && dict.previousUpdatedRange == range && !dict.dynamicRangesSet.has(range))) {
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 rectsAndTexts.rectList) {
let text = rectsAndTexts.textList[i];
// Next up is to check of the outline box' borders will not overlap with
// rects that we drew before or will draw after this one.
// We're taking the width of the border into account, which is
// `kOutlineBoxBorderSize` pixels.
// When left and/ or right sides will overlap with the current, previous
// or next rect, make sure to make the necessary adjustments to the style.
// These adjustments will override the styles as defined in `kModalStyles.outlineNode`.
let intersectingSides = new Set();
let previous = rectsAndTexts.rectList[i - 1];
if (previous &&
rect.left - previous.right <= 2 * kOutlineBoxBorderSize) {
intersectingSides.add("left");
}
let next = rectsAndTexts.rectList[i + 1];
if (next &&
next.left - rect.right <= 2 * kOutlineBoxBorderSize) {
intersectingSides.add("right");
}
let borderStyles = [...intersectingSides].map(side => [ "border-" + side, 0 ]);
if (intersectingSides.size) {
borderStyles.push([ "margin", `-${kOutlineBoxBorderSize}px 0 0 ${
intersectingSides.has("left") ? 0 : -kOutlineBoxBorderSize}px !important`]);
borderStyles.push([ "border-radius",
(intersectingSides.has("left") ? 0 : kOutlineBoxBorderRadius) + "px " +
(intersectingSides.has("right") ? 0 : kOutlineBoxBorderRadius) + "px " +
(intersectingSides.has("right") ? 0 : kOutlineBoxBorderRadius) + "px " +
(intersectingSides.has("left") ? 0 : kOutlineBoxBorderRadius) + "px" ]);
}
let outlineStyle = this._getStyleString(kModalStyles.outlineNode, [
["top", rect.top + "px"],
["left", rect.left + "px"],
["height", rect.height + "px"],
["width", rect.width + "px"]
], borderStyles, kDebug ? kModalStyles.outlineNodeDebug : []);
fontStyle.lineHeight = rect.height + "px";
let textStyle = this._getStyleString(kModalStyles.outlineText) + "; " +
this._getHTMLFontStyle(fontStyle);
if (rebuildOutline) {
let textBoxParent = outlineBox.appendChild(document.createElementNS(kNSHTML, "div"));
textBoxParent.setAttribute("id", kModalOutlineId + i);
textBoxParent.setAttribute("style", outlineStyle);
let textBox = document.createElementNS(kNSHTML, "span");
textBox.setAttribute("id", kModalOutlineTextId + i);
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 + i, "style", outlineStyle);
outlineAnonNode.setAttributeForElement(kModalOutlineTextId + i, "style", textStyle);
outlineAnonNode.setTextContentForElement(kModalOutlineTextId + i, text);
}
++i;
}
if (rebuildOutline) {
dict.modalHighlightOutline = kDebug ?
mockAnonymousContentNode((document.body ||
document.documentElement).appendChild(outlineBox)) :
document.insertAnonymousContent(outlineBox);
}
if (dict.animateOutline && !this._isPageTooBig(dict)) {
let animation;
dict.animations = new Set();
for (let i = rectsAndTexts.rectList.length - 1; i >= 0; --i) {
animation = dict.modalHighlightOutline.setAnimationForElement(kModalOutlineId + i,
Cu.cloneInto(kModalOutlineAnim.keyframes, window), kModalOutlineAnim.duration);
animation.onfinish = function() { dict.animations.delete(this); };
dict.animations.add(animation);
}
}
dict.animateOutline = false;
dict.previousUpdatedRange = range;