The Tor Browser: layout/style/test/animation_utils.js@141e0f1194b1 (annotated)

layout/style/test/animation_utils.js@141e0f1194b1 (annotated)

layout/style/test/animation_utils.js

Wed, 31 Dec 2014 07:16:47 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:16:47 +0100
branch: TOR_BUG_9701
changeset 3: 141e0f1194b1
permissions: -rw-r--r--

Revert simplistic fix pending revisit of Mozilla integration attempt.

 function px_to_num(str)
 {
     return Number(String(str).match(/^([\d.]+)px$/)[1]);
 }
 function bezier(x1, y1, x2, y2) {
     // Cubic bezier with control points (0, 0), (x1, y1), (x2, y2), and (1, 1).
     function x_for_t(t) {
         var omt = 1-t;
         return 3 * omt * omt * t * x1 + 3 * omt * t * t * x2 + t * t * t;
     }
     function y_for_t(t) {
         var omt = 1-t;
         return 3 * omt * omt * t * y1 + 3 * omt * t * t * y2 + t * t * t;
     }
     function t_for_x(x) {
         // Binary subdivision.
         var mint = 0, maxt = 1;
         for (var i = 0; i < 30; ++i) {
             var guesst = (mint + maxt) / 2;
             var guessx = x_for_t(guesst);
             if (x < guessx)
                 maxt = guesst;
             else
                 mint = guesst;
         }
         return (mint + maxt) / 2;
     }
     return function bezier_closure(x) {
         if (x == 0) return 0;
         if (x == 1) return 1;
         return y_for_t(t_for_x(x));
     }
 }
 function step_end(nsteps) {
     return function step_end_closure(x) {
         return Math.floor(x * nsteps) / nsteps;
     }
 }
 function step_start(nsteps) {
     var stepend = step_end(nsteps);
     return function step_start_closure(x) {
         return 1.0 - stepend(1.0 - x);
     }
 }
 var gTF = {
   "ease": bezier(0.25, 0.1, 0.25, 1),
   "linear": function(x) { return x; },
   "ease_in": bezier(0.42, 0, 1, 1),
   "ease_out": bezier(0, 0, 0.58, 1),
   "ease_in_out": bezier(0.42, 0, 0.58, 1),
   "step_start": step_start(1),
   "step_end": step_end(1),
 };
 function is_approx(float1, float2, error, desc) {
   ok(Math.abs(float1 - float2) < error,
      desc + ": " + float1 + " and " + float2 + " should be within " + error);
 }
 // Checks if off-main thread animation (OMTA) is available, and if it is, runs
 // the provided callback function. If OMTA is not available or is not
 // functioning correctly, the second callback, aOnSkip, is run instead.
 //
 // This function also does an internal test to verify that OMTA is working at
 // all so that if OMTA is not functioning correctly when it is expected to
 // function only a single failure is produced.
 //
 // Since this function relies on various asynchronous operations, the caller is
 // responsible for calling SimpleTest.waitForExplicitFinish() before calling
 // this and SimpleTest.finish() within aTestFunction and aOnSkip.
 function runOMTATest(aTestFunction, aOnSkip) {
   const OMTAPrefKey = "layers.offmainthreadcomposition.async-animations";
   var utils      = SpecialPowers.DOMWindowUtils;
   var expectOMTA = utils.layerManagerRemote &&
                    // ^ Off-main thread animation cannot be used if off-main
                    // thread composition (OMTC) is not available
                    SpecialPowers.getBoolPref(OMTAPrefKey);
   isOMTAWorking().then(function(isWorking) {
     if (expectOMTA) {
       if (isWorking) {
         aTestFunction();
       } else {
         // We only call this when we know it will fail as otherwise in the
         // regular success case we will end up inflating the "passed tests"
         // count by 1
         ok(isWorking, "OMTA is working as expected");
         aOnSkip();
       }
     } else {
       todo(isWorking, "OMTA is working");
       aOnSkip();
     }
   }).catch(function(err) {
     ok(false, err);
     aOnSkip();
   });
   function isOMTAWorking() {
     // Create keyframes rule
     const animationName = "a6ce3091ed85"; // Random name to avoid clashes
     var ruleText = "@keyframes " + animationName +
                    " { from { opacity: 0.5 } to { opacity 0.5 } }";
     var style = document.createElement("style");
     style.appendChild(document.createTextNode(ruleText));
     document.head.appendChild(style);
     // Create animation target
     var div = document.createElement("div");
     document.body.appendChild(div);
     // Give the target geometry so it is eligible for layerization
     div.style.width  = "100px";
     div.style.height = "100px";
     div.style.backgroundColor = "white";
     // Common clean up code
     var cleanUp = function() {
       div.parentNode.removeChild(div);
       style.parentNode.removeChild(style);
       if (utils.isTestControllingRefreshes) {
         utils.restoreNormalRefresh();
       }
     };
     return waitForDocumentLoad()
       .then(loadPaintListener)
       .then(function() {
         // Put refresh driver under test control and trigger animation
         utils.advanceTimeAndRefresh(0);
         div.style.animation = animationName + " 10s";
         // Trigger style flush
         div.clientTop;
         return waitForPaints();
       }).then(function() {
         var opacity = utils.getOMTAStyle(div, "opacity");
         cleanUp();
         return Promise.resolve(opacity == 0.5);
       }).catch(function(err) {
         cleanUp();
         return Promise.reject(err);
       });
   }
   function waitForDocumentLoad() {
     return new Promise(function(resolve, reject) {
       if (document.readyState === "complete") {
         resolve();
       } else {
         window.addEventListener("load", resolve);
       }
     });
   }
   function waitForPaints() {
     return new Promise(function(resolve, reject) {
       waitForAllPaintsFlushed(resolve);
     });
   }
   function loadPaintListener() {
     return new Promise(function(resolve, reject) {
       if (typeof(window.waitForAllPaints) !== "function") {
         var script = document.createElement("script");
         script.onload = resolve;
         script.onerror = function() {
           reject(new Error("Failed to load paint listener"));
         };
         script.src = "/tests/SimpleTest/paint_listener.js";
         var firstScript = document.scripts[0];
         firstScript.parentNode.insertBefore(script, firstScript);
       } else {
         resolve();
       }
     });
   }
 }