The Tor Browser: toolkit/content/tests/browser/browser_bug295977_autoscroll_overflow.js@6474c204b198 (annotated)

toolkit/content/tests/browser/browser_bug295977_autoscroll_overflow.js@6474c204b198 (annotated)

toolkit/content/tests/browser/browser_bug295977_autoscroll_overflow.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 function test()
 {
   const kPrefName_AutoScroll = "general.autoScroll";
   Services.prefs.setBoolPref(kPrefName_AutoScroll, true);
   gBrowser.selectedTab = gBrowser.addTab();
   const expectScrollNone = 0;
   const expectScrollVert = 1;
   const expectScrollHori = 2;
   const expectScrollBoth = 3;
   var allTests = [
     {dataUri: 'data:text/html,<html><head><meta charset="utf-8"></head><body><style type="text/css">div { display: inline-block; }</style>\
       <div id="a" style="width: 100px; height: 100px; overflow: hidden;"><div style="width: 200px; height: 200px;"></div></div>\
       <div id="b" style="width: 100px; height: 100px; overflow: auto;"><div style="width: 200px; height: 200px;"></div></div>\
       <div id="c" style="width: 100px; height: 100px; overflow-x: auto; overflow-y: hidden;"><div style="width: 200px; height: 200px;"></div></div>\
       <div id="d" style="width: 100px; height: 100px; overflow-y: auto; overflow-x: hidden;"><div style="width: 200px; height: 200px;"></div></div>\
       <select id="e" style="width: 100px; height: 100px;" multiple="multiple"><option>aaaaaaaaaaaaaaaaaaaaaaaa</option><option>a</option><option>a</option>\
       <option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option>\
       <option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option></select>\
       <select id="f" style="width: 100px; height: 100px;"><option>a</option><option>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</option><option>a</option>\
       <option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option>\
       <option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option><option>a</option></select>\
       <div id="g" style="width: 99px; height: 99px; border: 10px solid black; margin: 10px; overflow: auto;"><div style="width: 100px; height: 100px;"></div></div>\
       <div id="h" style="width: 100px; height: 100px; overflow: -moz-hidden-unscrollable;"><div style="width: 200px; height: 200px;"></div></div>\
       <iframe id="iframe" style="display: none;"></iframe>\
       </body></html>'},
     {elem: 'a', expected: expectScrollNone},
     {elem: 'b', expected: expectScrollBoth},
     {elem: 'c', expected: expectScrollHori},
     {elem: 'd', expected: expectScrollVert},
     {elem: 'e', expected: expectScrollVert},
     {elem: 'f', expected: expectScrollNone},
     {elem: 'g', expected: expectScrollBoth},
     {elem: 'h', expected: expectScrollNone},
     {dataUri: 'data:text/html,<html><head><meta charset="utf-8"></head><body id="i" style="overflow-y: scroll"><div style="height: 2000px"></div>\
       <iframe id="iframe" style="display: none;"></iframe>\
       </body></html>'},
     {elem: 'i', expected: expectScrollVert}, // bug 695121
     {dataUri: 'data:text/html,<html><head><meta charset="utf-8"></head><style>html, body { width: 100%; height: 100%; overflow-x: hidden; overflow-y: scroll; }</style>\
       <body id="j"><div style="height: 2000px"></div>\
       <iframe id="iframe" style="display: none;"></iframe>\
       </body></html>'},
     {elem: 'j', expected: expectScrollVert}  // bug 914251
   ];
   var doc;
   function nextTest() {
     var test = allTests.shift();
     if (!test) {
       endTest();
       return;
     }
     if (test.dataUri) {
       startLoad(test.dataUri);
       return;
     }
     var elem = doc.getElementById(test.elem);
     let firstTimestamp = undefined;
     function checkScroll(timestamp) {
       if (firstTimestamp === undefined) {
         firstTimestamp = timestamp;
       }
       // This value is calculated similarly to the value of the same name in
       // ClickEventHandler.autoscrollLoop, except here it's cumulative across
       // all frames after the first one instead of being based only on the
       // current frame.
       let timeCompensation = (timestamp - firstTimestamp) / 20;
       info("timestamp=" + timestamp + " firstTimestamp=" + firstTimestamp +
            " timeCompensation=" + timeCompensation);
       // Try to wait until enough time has passed to allow the scroll to happen.
       // autoscrollLoop incrementally scrolls during each animation frame, but
       // due to how its calculations work, when a frame is very close to the
       // previous frame, no scrolling may actually occur during that frame.
       // After 20ms's worth of frames, timeCompensation will be 1, making it
       // more likely that the accumulated scroll in autoscrollLoop will be >= 1,
       // although it also depends on acceleration, which here in this test
       // should be > 1 due to how it synthesizes mouse events below.
       if (timeCompensation < 1) {
         window.mozRequestAnimationFrame(checkScroll);
         return;
       }
       // Close the autoscroll popup by synthesizing Esc.
       EventUtils.synthesizeKey("VK_ESCAPE", {}, gBrowser.contentWindow);
       var scrollVert = test.expected & expectScrollVert;
       ok((scrollVert && elem.scrollTop > 0) ||
          (!scrollVert && elem.scrollTop == 0),
          test.elem+' should'+(scrollVert ? '' : ' not')+' have scrolled vertically');
       var scrollHori = test.expected & expectScrollHori;
       ok((scrollHori && elem.scrollLeft > 0) ||
          (!scrollHori && elem.scrollLeft == 0),
          test.elem+' should'+(scrollHori ? '' : ' not')+' have scrolled horizontally');
       // Before continuing the test, we need to ensure that the IPC
       // message that stops autoscrolling has had time to arrive.
       executeSoon(nextTest);
     };
     EventUtils.synthesizeMouse(elem, 50, 50, { button: 1 },
                                gBrowser.contentWindow);
     // This ensures bug 605127 is fixed: pagehide in an unrelated document
     // should not cancel the autoscroll.
     var iframe = gBrowser.contentDocument.getElementById("iframe");
     var e = iframe.contentDocument.createEvent("pagetransition");
     e.initPageTransitionEvent("pagehide", true, true, false);
     iframe.contentDocument.dispatchEvent(e);
     iframe.contentDocument.documentElement.dispatchEvent(e);
     EventUtils.synthesizeMouse(elem, 100, 100,
                                { type: "mousemove", clickCount: "0" },
                                gBrowser.contentWindow);
     // Start checking for the scroll.
     window.mozRequestAnimationFrame(checkScroll);
   }
   waitForExplicitFinish();
   nextTest();
   function startLoad(dataUri) {
     gBrowser.selectedBrowser.addEventListener("pageshow", onLoad, false);
     gBrowser.loadURI(dataUri);
   }
   function onLoad() {
     gBrowser.selectedBrowser.removeEventListener("pageshow", onLoad, false);
     waitForFocus(onFocus, content);
   }
   function onFocus() {
     doc = gBrowser.contentDocument;
     nextTest();
   }
   function endTest() {
     // restore the changed prefs
     if (Services.prefs.prefHasUserValue(kPrefName_AutoScroll))
       Services.prefs.clearUserPref(kPrefName_AutoScroll);
     // cleaning-up
     gBrowser.removeCurrentTab();
     // waitForFocus() fixes a failure in the next test if the latter runs too soon.
     waitForFocus(finish);
   }
 }