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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "web/DevToolsEmulator.h" | 5 #include "web/DevToolsEmulator.h" |
6 | 6 |
7 #include "core/frame/FrameHost.h" | 7 #include "core/frame/FrameHost.h" |
8 #include "core/frame/FrameView.h" | 8 #include "core/frame/FrameView.h" |
9 #include "core/frame/Settings.h" | 9 #include "core/frame/Settings.h" |
10 #include "core/frame/VisualViewport.h" | 10 #include "core/frame/VisualViewport.h" |
11 #include "core/page/Page.h" | 11 #include "core/page/Page.h" |
12 #include "core/style/ComputedStyle.h" | 12 #include "core/style/ComputedStyle.h" |
13 #include "platform/RuntimeEnabledFeatures.h" | 13 #include "platform/RuntimeEnabledFeatures.h" |
14 #include "public/platform/WebLayerTreeView.h" | 14 #include "public/platform/WebLayerTreeView.h" |
15 #include "web/WebInputEventConversion.h" | 15 #include "web/WebInputEventConversion.h" |
16 #include "web/WebLocalFrameImpl.h" | 16 #include "web/WebLocalFrameImpl.h" |
17 #include "web/WebSettingsImpl.h" | 17 #include "web/WebSettingsImpl.h" |
18 #include "web/WebViewImpl.h" | 18 #include "web/WebViewImpl.h" |
| 19 #include "wtf/PtrUtil.h" |
19 | 20 |
20 namespace { | 21 namespace { |
21 | 22 |
22 static float calculateDeviceScaleAdjustment(int width, int height, float deviceS
caleFactor) | 23 static float calculateDeviceScaleAdjustment(int width, int height, float deviceS
caleFactor) |
23 { | 24 { |
24 // Chromium on Android uses a device scale adjustment for fonts used in text
autosizing for | 25 // Chromium on Android uses a device scale adjustment for fonts used in text
autosizing for |
25 // improved legibility. This function computes this adjusted value for text
autosizing. | 26 // improved legibility. This function computes this adjusted value for text
autosizing. |
26 // For a description of the Android device scale adjustment algorithm, see: | 27 // For a description of the Android device scale adjustment algorithm, see: |
27 // chrome/browser/chrome_content_browser_client.cc, GetDeviceScaleAdjustment
(...) | 28 // chrome/browser/chrome_content_browser_client.cc, GetDeviceScaleAdjustment
(...) |
28 if (!width || !height || !deviceScaleFactor) | 29 if (!width || !height || !deviceScaleFactor) |
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359 return false; | 360 return false; |
360 | 361 |
361 // FIXME: This workaround is required for touch emulation on Mac, where | 362 // FIXME: This workaround is required for touch emulation on Mac, where |
362 // compositor-side pinch handling is not enabled. See http://crbug.com/13800
3. | 363 // compositor-side pinch handling is not enabled. See http://crbug.com/13800
3. |
363 bool isPinch = inputEvent.type == WebInputEvent::GesturePinchBegin || inputE
vent.type == WebInputEvent::GesturePinchUpdate || inputEvent.type == WebInputEve
nt::GesturePinchEnd; | 364 bool isPinch = inputEvent.type == WebInputEvent::GesturePinchBegin || inputE
vent.type == WebInputEvent::GesturePinchUpdate || inputEvent.type == WebInputEve
nt::GesturePinchEnd; |
364 if (isPinch && m_touchEventEmulationEnabled) { | 365 if (isPinch && m_touchEventEmulationEnabled) { |
365 FrameView* frameView = page->deprecatedLocalMainFrame()->view(); | 366 FrameView* frameView = page->deprecatedLocalMainFrame()->view(); |
366 PlatformGestureEventBuilder gestureEvent(frameView, static_cast<const We
bGestureEvent&>(inputEvent)); | 367 PlatformGestureEventBuilder gestureEvent(frameView, static_cast<const We
bGestureEvent&>(inputEvent)); |
367 float pageScaleFactor = page->pageScaleFactor(); | 368 float pageScaleFactor = page->pageScaleFactor(); |
368 if (gestureEvent.type() == PlatformEvent::GesturePinchBegin) { | 369 if (gestureEvent.type() == PlatformEvent::GesturePinchBegin) { |
369 m_lastPinchAnchorCss = adoptPtr(new IntPoint(frameView->scrollPositi
on() + gestureEvent.position())); | 370 m_lastPinchAnchorCss = wrapUnique(new IntPoint(frameView->scrollPosi
tion() + gestureEvent.position())); |
370 m_lastPinchAnchorDip = adoptPtr(new IntPoint(gestureEvent.position()
)); | 371 m_lastPinchAnchorDip = wrapUnique(new IntPoint(gestureEvent.position
())); |
371 m_lastPinchAnchorDip->scale(pageScaleFactor, pageScaleFactor); | 372 m_lastPinchAnchorDip->scale(pageScaleFactor, pageScaleFactor); |
372 } | 373 } |
373 if (gestureEvent.type() == PlatformEvent::GesturePinchUpdate && m_lastPi
nchAnchorCss) { | 374 if (gestureEvent.type() == PlatformEvent::GesturePinchUpdate && m_lastPi
nchAnchorCss) { |
374 float newPageScaleFactor = pageScaleFactor * gestureEvent.scale(); | 375 float newPageScaleFactor = pageScaleFactor * gestureEvent.scale(); |
375 IntPoint anchorCss(*m_lastPinchAnchorDip.get()); | 376 IntPoint anchorCss(*m_lastPinchAnchorDip.get()); |
376 anchorCss.scale(1.f / newPageScaleFactor, 1.f / newPageScaleFactor); | 377 anchorCss.scale(1.f / newPageScaleFactor, 1.f / newPageScaleFactor); |
377 m_webViewImpl->setPageScaleFactor(newPageScaleFactor); | 378 m_webViewImpl->setPageScaleFactor(newPageScaleFactor); |
378 m_webViewImpl->mainFrame()->setScrollOffset(toIntSize(*m_lastPinchAn
chorCss.get() - toIntSize(anchorCss))); | 379 m_webViewImpl->mainFrame()->setScrollOffset(toIntSize(*m_lastPinchAn
chorCss.get() - toIntSize(anchorCss))); |
379 } | 380 } |
380 if (gestureEvent.type() == PlatformEvent::GesturePinchEnd) { | 381 if (gestureEvent.type() == PlatformEvent::GesturePinchEnd) { |
381 m_lastPinchAnchorCss.reset(); | 382 m_lastPinchAnchorCss.reset(); |
382 m_lastPinchAnchorDip.reset(); | 383 m_lastPinchAnchorDip.reset(); |
383 } | 384 } |
384 return true; | 385 return true; |
385 } | 386 } |
386 | 387 |
387 return false; | 388 return false; |
388 } | 389 } |
389 | 390 |
390 } // namespace blink | 391 } // namespace blink |
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