The Tor Browser: layout/ipc/test-ipcbrowser-chrome.js@fc2d59ddac77

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 function init() {

     6     enableAsyncScrolling();

     7     messageManager.loadFrameScript(

     8         "chrome://global/content/test-ipcbrowser-content.js", true

     9     );

    10 }

    12 function browser() {

    13     return document.getElementById("content");

    14 }

    16 function frameLoader() {

    17     return browser().QueryInterface(Components.interfaces.nsIFrameLoaderOwner).frameLoader;

    18 }

    20 function viewManager() {

    21     return frameLoader().QueryInterface(Components.interfaces.nsIContentViewManager);

    22 }

    24 function rootView() {

    25     return viewManager().rootContentView;

    26 }

    28 function enableAsyncScrolling() {

    29     frameLoader().renderMode = Components.interfaces.nsIFrameLoader.RENDER_MODE_ASYNC_SCROLL;

    30 }

    32 // Functions affecting the content window.

    34 function loadURL(url) {

    35     browser().setAttribute('src', url);

    36 }

    38 function scrollContentBy(dx, dy) {

    39     messageManager.broadcastAsyncMessage("scrollBy",

    40                                          { dx: dx, dy: dy });

    42 }

    44 function scrollContentTo(x, y) {

    45     messageManager.broadcastAsyncMessage("scrollTo",

    46                                          { x: x, y: y });

    47 }

    49 function setContentViewport(w, h) {

    50     messageManager.broadcastAsyncMessage("setViewport",

    51                                          { w: w, h: h });

    52 }

    54 function setContentDisplayPort(x, y, w, h) {

    55     messageManager.broadcastAsyncMessage("setDisplayPort",

    56                                          { x: x, y: y, w: w, h: h });

    57 }

    59 function setContentResolution(xres, yres) {

    60     messageManager.broadcastAsyncMessage("setResolution",

    61                                          { xres: xres, yres: yres });

    62 }

    64 // Functions affecting <browser>.

    66 function scrollViewportBy(dx, dy) {

    67     rootView().scrollBy(dx, dy);

    68 }

    70 function scrollViewportTo(x, y) {

    71     rootView().scrollTo(x, y);

    72 }

    74 function setViewportScale(xs, ys) {

    75     rootView().setScale(xs, ys);

    76 }

    78 var kDelayMs = 100;

    79 var kDurationMs = 250;

    80 var scrolling = false;

    81 function startAnimatedScrollBy(dx, dy) {

    82     if (scrolling)

    83         throw "don't interrupt me!";

    85     scrolling = true;

    87     var start = mozAnimationStartTime;

    88     var end = start + kDurationMs;

    89     // |- k| so that we do something in first invocation of nudge()

    90     var prevNow = start - 20;

    91     var accumDx = 0, accumDy = 0;

    93     var sentScrollBy = false;

    94     function nudgeScroll(now) {

    95 	if (!scrolling) {

    96 	    // we've been canceled

    97 	    return;

    98 	}

    99         var ddx = dx * (now - prevNow) / kDurationMs;

   100         var ddy = dy * (now - prevNow) / kDurationMs;

   102         ddx = Math.min(dx - accumDx, ddx);

   103         ddy = Math.min(dy - accumDy, ddy);

   104         accumDx += ddx;

   105         accumDy += ddy;

   107         rootView().scrollBy(ddx, ddy);

   109         if (!sentScrollBy && 100 <= (now - start)) {

   110             messageManager.broadcastAsyncMessage("scrollBy",

   111                                                  { dx: dx, dy: dy });

   112             sentScrollBy = true;

   113         }

   115         if (now >= end || (accumDx >= dx && accumDy >= dy)) {

   116             var fixupDx = Math.max(dx - accumDx, 0);

   117             var fixupDy = Math.max(dy - accumDy, 0);

   118             rootView().scrollBy(fixupDx, fixupDy);

   120             scrolling = false;

   121         }

   122         else {

   123             mozRequestAnimationFrame(nudgeScroll);

   124         }

   126         prevNow = now;

   127     }

   129     nudgeScroll(start);

   130     mozRequestAnimationFrame(nudgeScroll);

   131 }

The Tor Browser / file revision