src/tools/telemetry/telemetry/page/actions/tap.js

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 'use strict';
   6
   7 (function() {
   8
   9   function TapGestureOptions(opt_options) {
  10     if (opt_options) {
  11       this.element_ = opt_options.element;
  12       this.left_position_percentage_ = opt_options.left_position_percentage;
  13       this.top_position_percentage_ = opt_options.top_position_percentage;
  14       this.duration_ms_ = opt_options.duration_ms;
  15       this.gesture_source_type_ = opt_options.gesture_source_type;
  16     } else {
  17       this.element_ = document.body;
  18       this.left_position_percentage_ = 0.5;
  19       this.top_position_percentage_ = 0.5;
  20       this.duration_ms_ = 0;
  21       this.gesture_source_type_ = chrome.gpuBenchmarking.DEFAULT_INPUT;
  22     }
  23   }
  24
  25   function supportedByBrowser() {
  26     return !!(window.chrome &&
  27               chrome.gpuBenchmarking &&
  28               chrome.gpuBenchmarking.tap);
  29   }
  30
  31   function TapAction(opt_callback) {
  32     var self = this;
  33
  34     this.beginMeasuringHook = function() {}
  35     this.endMeasuringHook = function() {}
  36
  37     this.callback_ = opt_callback;
  38   }
  39
  40   TapAction.prototype.start = function(opt_options) {
  41     this.options_ = new TapGestureOptions(opt_options);
  42     // Assign this.element_ here instead of constructor, because the constructor
  43     // ensures this method will be called after the document is loaded.
  44     this.element_ = this.options_.element_;
  45
  46     requestAnimationFrame(this.startPass_.bind(this));
  47   };
  48
  49   TapAction.prototype.startPass_ = function() {
  50     this.beginMeasuringHook();
  51
  52     var rect = __GestureCommon_GetBoundingVisibleRect(this.options_.element_);
  53     var position_left =
  54         rect.left + rect.width * this.options_.left_position_percentage_;
  55     var position_top =
  56         rect.top + rect.height * this.options_.top_position_percentage_;
  57     chrome.gpuBenchmarking.tap(position_left, position_top,
  58                                this.onGestureComplete_.bind(this),
  59                                this.options_.duration_ms_,
  60                                this.options_.gesture_source_type_);
  61   };
  62
  63   TapAction.prototype.onGestureComplete_ = function() {
  64     this.endMeasuringHook();
  65
  66     // We're done.
  67     if (this.callback_)
  68       this.callback_();
  69   };
  70
  71   window.__TapAction = TapAction;
  72   window.__TapAction_SupportedByBrowser = supportedByBrowser;
  73 })();