mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
125 lines
3.6 KiB
JavaScript
125 lines
3.6 KiB
JavaScript
// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
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/* 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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/**
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* Responsible for zooming in to a given view rectangle
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*/
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const AnimatedZoom = {
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startScale: null,
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/** Starts an animated zoom to zoomRect. */
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animateTo: function(aZoomRect) {
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if (!aZoomRect)
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return;
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this.zoomTo = aZoomRect.clone();
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if (this.animationDuration === undefined)
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this.animationDuration = Services.prefs.getIntPref("browser.ui.zoom.animationDuration");
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Browser.forceChromeReflow();
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this.start();
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// Check if zooming animations were occuring before.
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if (!this.zoomRect) {
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this.updateTo(this.zoomFrom);
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mozRequestAnimationFrame(this);
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let event = document.createEvent("Events");
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event.initEvent("AnimatedZoomBegin", true, true);
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window.dispatchEvent(event);
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}
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},
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start: function start() {
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this.tab = Browser.selectedTab;
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this.browser = this.tab.browser;
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this.bcr = this.browser.getBoundingClientRect();
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this.zoomFrom = this.zoomRect || this.getStartRect();
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this.startScale = this.browser.scale;
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this.beginTime = mozAnimationStartTime;
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},
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/** Get the visible rect, in device pixels relative to the content origin. */
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getStartRect: function getStartRect() {
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let browser = this.browser;
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let scroll = browser.getRootView().getPosition();
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return new Rect(scroll.x, scroll.y, this.bcr.width, this.bcr.height);
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},
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/** Update the visible rect, in device pixels relative to the content origin. */
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updateTo: function(nextRect) {
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// Stop animating if the browser has been destroyed
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if (typeof this.browser.fuzzyZoom !== "function") {
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this.reset();
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return false;
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}
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let zoomRatio = this.bcr.width / nextRect.width;
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let scale = this.startScale * zoomRatio;
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let scrollX = nextRect.left * zoomRatio;
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let scrollY = nextRect.top * zoomRatio;
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this.browser.fuzzyZoom(scale, scrollX, scrollY);
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this.zoomRect = nextRect;
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return true;
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},
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/** Stop animation, zoom to point, and clean up. */
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finish: function() {
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if (!this.updateTo(this.zoomTo || this.zoomRect))
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return;
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// Check whether the zoom limits have changed since the animation started.
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let browser = this.browser;
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let finalScale = this.tab.clampZoomLevel(browser.scale);
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if (browser.scale != finalScale)
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browser.scale = finalScale; // scale= calls finishFuzzyZoom.
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else
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browser.finishFuzzyZoom();
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this.reset();
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browser._updateCSSViewport();
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},
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reset: function reset() {
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this.beginTime = null;
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this.zoomTo = null;
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this.zoomFrom = null;
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this.zoomRect = null;
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this.startScale = null;
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let event = document.createEvent("Events");
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event.initEvent("AnimatedZoomEnd", true, true);
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window.dispatchEvent(event);
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},
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isZooming: function isZooming() {
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return this.beginTime != null;
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},
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sample: function(aTimeStamp) {
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try {
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let tdiff = aTimeStamp - this.beginTime;
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let counter = tdiff / this.animationDuration;
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if (counter < 1) {
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// update browser to interpolated rectangle
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let rect = this.zoomFrom.blend(this.zoomTo, counter);
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if (this.updateTo(rect))
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mozRequestAnimationFrame(this);
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} else {
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// last cycle already rendered final scaled image, now clean up
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this.finish();
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}
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} catch(e) {
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this.finish();
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throw e;
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}
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}
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};
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