blob: 7d09262b8a493964d35a9ac2b6c0239ab3ac0475 [file] [log] [blame]
# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
from __future__ import division
from telemetry.internal.actions import page_action
from telemetry.internal.actions import utils
from telemetry.util import js_template
class PinchAction(page_action.PageAction):
def __init__(self,
left_anchor_ratio=0.5,
top_anchor_ratio=0.5,
scale_factor=None,
speed_in_pixels_per_second=800,
synthetic_gesture_source=page_action.GESTURE_SOURCE_DEFAULT,
timeout=page_action.DEFAULT_TIMEOUT):
super(PinchAction, self).__init__(timeout=timeout)
self._left_anchor_ratio = left_anchor_ratio
self._top_anchor_ratio = top_anchor_ratio
self._scale_factor = scale_factor
self._speed = speed_in_pixels_per_second
self._synthetic_gesture_source = (
'chrome.gpuBenchmarking.%s_INPUT' % synthetic_gesture_source)
def WillRunAction(self, tab):
utils.InjectJavaScript(tab, 'gesture_common.js')
utils.InjectJavaScript(tab, 'pinch.js')
# Fail if browser doesn't support synthetic pinch gestures.
if not tab.EvaluateJavaScript('window.__PinchAction_SupportedByBrowser()'):
raise page_action.PageActionNotSupported(
'Synthetic pinch not supported for this browser')
tab.ExecuteJavaScript("""
window.__pinchActionDone = false;
window.__pinchAction = new __PinchAction(function() {
window.__pinchActionDone = true;
});""")
@staticmethod
def _GetDefaultScaleFactorForPage(tab):
current_scale_factor = tab.EvaluateJavaScript("""
"visualViewport" in window
? visualViewport.scale
: window.outerWidth / window.innerWidth'""")
#2To3-division: this line is unchanged as result is expected floats.
return 3.0 / current_scale_factor
def RunAction(self, tab):
scale_factor = (self._scale_factor if self._scale_factor else
PinchAction._GetDefaultScaleFactorForPage(tab))
code = js_template.Render(
"""
window.__pinchAction.start({
left_anchor_ratio: {{ left_anchor_ratio }},
top_anchor_ratio: {{ top_anchor_ratio }},
scale_factor: {{ scale_factor }},
speed: {{ speed }}
});""",
left_anchor_ratio=self._left_anchor_ratio,
top_anchor_ratio=self._top_anchor_ratio,
scale_factor=scale_factor,
speed=self._speed)
tab.EvaluateJavaScript(code)
tab.WaitForJavaScriptCondition(
'window.__pinchActionDone', timeout=self.timeout)