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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
5from telemetry.internal.actions import page_action
6from telemetry.internal.actions import utils
7from telemetry.util import js_template
8
9
10class TapAction(page_action.PageAction):
11  def __init__(self, selector=None, text=None, element_function=None,
12               left_position_percentage=0.5, top_position_percentage=0.5,
13               duration_ms=50,
14               synthetic_gesture_source=page_action.GESTURE_SOURCE_DEFAULT):
15    super(TapAction, self).__init__()
16    self.selector = selector
17    self.text = text
18    self.element_function = element_function
19    self.left_position_percentage = left_position_percentage
20    self.top_position_percentage = top_position_percentage
21    self.duration_ms = duration_ms
22    self._synthetic_gesture_source = ('chrome.gpuBenchmarking.%s_INPUT' %
23                                      synthetic_gesture_source)
24
25  def WillRunAction(self, tab):
26    utils.InjectJavaScript(tab, 'gesture_common.js')
27    utils.InjectJavaScript(tab, 'tap.js')
28
29    # Fail if browser doesn't support synthetic tap gestures.
30    if not tab.EvaluateJavaScript('window.__TapAction_SupportedByBrowser()'):
31      raise page_action.PageActionNotSupported(
32          'Synthetic tap not supported for this browser')
33
34    tab.ExecuteJavaScript("""
35        window.__tapActionDone = false;
36        window.__tapAction = new __TapAction(function() {
37          window.__tapActionDone = true;
38        });""")
39
40  def HasElementSelector(self):
41    return (self.element_function is not None or self.selector is not None or
42            self.text is not None)
43
44  def RunAction(self, tab):
45    if not self.HasElementSelector():
46      self.element_function = 'document.body'
47
48    code = js_template.Render('''
49        function(element, errorMsg) {
50          if (!element) {
51            throw Error('Cannot find element: ' + errorMsg);
52          }
53          window.__tapAction.start({
54            element: element,
55            left_position_percentage: {{ left_position_percentage }},
56            top_position_percentage: {{ top_position_percentage }},
57            duration_ms: {{ duration_ms }},
58            gesture_source_type: {{ @gesture_source_type }}
59          });
60        }''',
61        left_position_percentage=self.left_position_percentage,
62        top_position_percentage=self.top_position_percentage,
63        duration_ms=self.duration_ms,
64        gesture_source_type=self._synthetic_gesture_source)
65
66    page_action.EvaluateCallbackWithElement(
67        tab, code, selector=self.selector, text=self.text,
68        element_function=self.element_function)
69    # The second disjunct handles the case where the tap action leads to an
70    # immediate navigation (in which case the expression below might already be
71    # evaluated on the new page).
72    tab.WaitForJavaScriptCondition(
73        'window.__tapActionDone || window.__tapAction === undefined',
74        timeout=60)
75