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
5import os
6
7from telemetry.internal.actions import page_action
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    for js_file in ['gesture_common.js', 'tap.js']:
27      with open(os.path.join(os.path.dirname(__file__), js_file)) as f:
28        js = f.read()
29        tab.ExecuteJavaScript(js)
30
31    # Fail if browser doesn't support synthetic tap gestures.
32    if not tab.EvaluateJavaScript('window.__TapAction_SupportedByBrowser()'):
33      raise page_action.PageActionNotSupported(
34          'Synthetic tap not supported for this browser')
35
36    done_callback = 'function() { window.__tapActionDone = true; }'
37    tab.ExecuteJavaScript("""
38        window.__tapActionDone = false;
39        window.__tapAction = new __TapAction(%s);"""
40        % (done_callback))
41
42  def HasElementSelector(self):
43    return (self.element_function is not None or self.selector is not None or
44            self.text is not None)
45
46  def RunAction(self, tab):
47    if not self.HasElementSelector():
48      self.element_function = 'document.body'
49
50    tap_cmd = ('''
51        window.__tapAction.start({
52          element: element,
53          left_position_percentage: %s,
54          top_position_percentage: %s,
55          duration_ms: %s,
56          gesture_source_type: %s
57        });'''
58          % (self.left_position_percentage,
59             self.top_position_percentage,
60             self.duration_ms,
61             self._synthetic_gesture_source))
62    code = '''
63        function(element, errorMsg) {
64          if (!element) {
65            throw Error('Cannot find element: ' + errorMsg);
66          }
67          %s;
68        }''' % tap_cmd
69
70    page_action.EvaluateCallbackWithElement(
71        tab, code, selector=self.selector, text=self.text,
72        element_function=self.element_function)
73    tab.WaitForJavaScriptExpression('window.__tapActionDone', 60)
74