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.page.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    super(TapAction, self).__init__()
15    self.selector = selector
16    self.text = text
17    self.element_function = element_function
18    self.left_position_percentage = left_position_percentage
19    self.top_position_percentage = top_position_percentage
20    self.duration_ms = duration_ms
21
22  def WillRunAction(self, tab):
23    for js_file in ['gesture_common.js', 'tap.js']:
24      with open(os.path.join(os.path.dirname(__file__), js_file)) as f:
25        js = f.read()
26        tab.ExecuteJavaScript(js)
27
28    # Fail if browser doesn't support synthetic tap gestures.
29    if not tab.EvaluateJavaScript('window.__TapAction_SupportedByBrowser()'):
30      raise page_action.PageActionNotSupported(
31          'Synthetic tap not supported for this browser')
32
33    done_callback = 'function() { window.__tapActionDone = true; }'
34    tab.ExecuteJavaScript("""
35        window.__tapActionDone = false;
36        window.__tapAction = new __TapAction(%s);"""
37        % (done_callback))
38
39  def HasElementSelector(self):
40    return (self.element_function is not None or self.selector is not None or
41            self.text is not None)
42
43  def RunAction(self, tab):
44    if not self.HasElementSelector():
45      self.element_function = 'document.body'
46    gesture_source_type = page_action.GetGestureSourceTypeFromOptions(tab)
47
48    tap_cmd = ('''
49        window.__tapAction.start({
50          element: element,
51          left_position_percentage: %s,
52          top_position_percentage: %s,
53          duration_ms: %s,
54          gesture_source_type: %s
55        });'''
56          % (self.left_position_percentage,
57             self.top_position_percentage,
58             self.duration_ms,
59             gesture_source_type))
60    code = '''
61        function(element, errorMsg) {
62          if (!element) {
63            throw Error('Cannot find element: ' + errorMsg);
64          }
65          %s;
66        }''' % tap_cmd
67
68    page_action.EvaluateCallbackWithElement(
69        tab, code, selector=self.selector, text=self.text,
70        element_function=self.element_function)
71    tab.WaitForJavaScriptExpression('window.__tapActionDone', 60)
72