| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef WebWidgetClient_h |
| #define WebWidgetClient_h |
| |
| #include "WebNavigationPolicy.h" |
| #include "public/platform/WebCommon.h" |
| #include "public/platform/WebLayerTreeView.h" |
| #include "public/platform/WebPoint.h" |
| #include "public/platform/WebRect.h" |
| #include "public/platform/WebScreenInfo.h" |
| #include "public/web/WebMeaningfulLayout.h" |
| #include "public/web/WebTextDirection.h" |
| #include "public/web/WebTouchAction.h" |
| |
| namespace blink { |
| |
| class WebGestureEvent; |
| class WebNode; |
| class WebString; |
| class WebWidget; |
| struct WebCursorInfo; |
| struct WebFloatPoint; |
| struct WebFloatRect; |
| struct WebFloatSize; |
| struct WebSize; |
| |
| class WebWidgetClient { |
| public: |
| // Called when a region of the WebWidget needs to be re-painted. |
| virtual void didInvalidateRect(const WebRect&) {} |
| |
| // Attempt to initialize compositing for this widget. If this is successful, |
| // layerTreeView() will return a valid WebLayerTreeView. |
| virtual void initializeLayerTreeView() {} |
| |
| // Return a compositing view used for this widget. This is owned by the |
| // WebWidgetClient. |
| virtual WebLayerTreeView* layerTreeView() { return 0; } |
| // FIXME: Remove all overrides of this and change layerTreeView() above to |
| // ASSERT_NOT_REACHED. |
| virtual bool allowsBrokenNullLayerTreeView() const { return false; } |
| |
| // Called when a call to WebWidget::animate is required |
| virtual void scheduleAnimation() {} |
| |
| // Called immediately following the first compositor-driven (frame-generating) |
| // layout that happened after an interesting document lifecyle change (see |
| // WebMeaningfulLayout for details.) |
| virtual void didMeaningfulLayout(WebMeaningfulLayout) {} |
| |
| virtual void didFirstLayoutAfterFinishedParsing() {} |
| |
| // Called when the cursor for the widget changes. |
| virtual void didChangeCursor(const WebCursorInfo&) {} |
| |
| // Called when the widget should be closed. WebWidget::close() should |
| // be called asynchronously as a result of this notification. |
| virtual void closeWidgetSoon() {} |
| |
| // Called to show the widget according to the given policy. |
| virtual void show(WebNavigationPolicy) {} |
| |
| // Called to get/set the position of the widget in screen coordinates. |
| virtual WebRect windowRect() { return WebRect(); } |
| virtual void setWindowRect(const WebRect&) {} |
| |
| // Called when a tooltip should be shown at the current cursor position. |
| virtual void setToolTipText(const WebString&, WebTextDirection hint) {} |
| |
| // Called to get the position of the resizer rect in window coordinates. |
| virtual WebRect windowResizerRect() { return WebRect(); } |
| |
| // Called to query information about the screen where this widget is |
| // displayed. |
| virtual WebScreenInfo screenInfo() { return WebScreenInfo(); } |
| |
| // When this method gets called, WebWidgetClient implementation should |
| // reset the input method by cancelling any ongoing composition. |
| virtual void resetInputMethod() {} |
| |
| // Requests to lock the mouse cursor. If true is returned, the success |
| // result will be asynchronously returned via a single call to |
| // WebWidget::didAcquirePointerLock() or |
| // WebWidget::didNotAcquirePointerLock(). |
| // If false, the request has been denied synchronously. |
| virtual bool requestPointerLock() { return false; } |
| |
| // Cause the pointer lock to be released. This may be called at any time, |
| // including when a lock is pending but not yet acquired. |
| // WebWidget::didLosePointerLock() is called when unlock is complete. |
| virtual void requestPointerUnlock() {} |
| |
| // Returns true iff the pointer is locked to this widget. |
| virtual bool isPointerLocked() { return false; } |
| |
| // Called when a gesture event is handled. |
| virtual void didHandleGestureEvent(const WebGestureEvent& event, |
| bool eventCancelled) {} |
| |
| // Called when overscrolled on main thread. All parameters are in |
| // viewport-space. |
| virtual void didOverscroll(const WebFloatSize& overscrollDelta, |
| const WebFloatSize& accumulatedOverscroll, |
| const WebFloatPoint& positionInViewport, |
| const WebFloatSize& velocityInViewport) {} |
| |
| // Called to update if touch events should be sent. |
| virtual void hasTouchEventHandlers(bool) {} |
| |
| // Called during WebWidget::HandleInputEvent for a TouchStart event to inform |
| // the embedder of the touch actions that are permitted for this touch. |
| virtual void setTouchAction(WebTouchAction touchAction) {} |
| |
| // Called when value of focused text field gets dirty, e.g. value is |
| // modified by script, not by user input. |
| virtual void didUpdateTextOfFocusedElementByNonUserInput() {} |
| |
| // Request the browser to show the IME for current input type. |
| virtual void showImeIfNeeded() {} |
| |
| // Request that the browser show a UI for an unhandled tap, if needed. |
| // Invoked during the handling of a GestureTap input event whenever the |
| // event is not consumed. |
| // |tappedPosition| is the point where the mouseDown occurred in client |
| // coordinates. |
| // |tappedNode| is the node that the mouseDown event hit, provided so the |
| // UI can be shown only on certain kinds of nodes in specific locations. |
| // |pageChanged| is true if and only if the DOM tree or style was |
| // modified during the dispatch of the mouse*, or click events associated |
| // with the tap. |
| // This provides a heuristic to help identify when a page is doing |
| // something as a result of a tap without explicitly consuming the event. |
| virtual void showUnhandledTapUIIfNeeded(const WebPoint& tappedPosition, |
| const WebNode& tappedNode, |
| bool pageChanged) {} |
| |
| // Converts the |rect| from Blink's Viewport coordinates to the |
| // coordinates in the native window used to display the content, in |
| // DIP. They're identical in tradional world, but will differ when |
| // use-zoom-for-dsf feature is eanbled, and Viewport coordinates |
| // becomes DSF times larger than window coordinates. |
| // TODO(oshima): Update the comment when the migration is completed. |
| virtual void convertViewportToWindow(WebRect* rect) {} |
| |
| // Converts the |rect| from the coordinates in native window in |
| // DIP to Blink's Viewport coordinates. They're identical in |
| // tradional world, but will differ when use-zoom-for-dsf feature |
| // is eanbled. TODO(oshima): Update the comment when the |
| // migration is completed. |
| virtual void convertWindowToViewport(WebFloatRect* rect) {} |
| |
| protected: |
| ~WebWidgetClient() {} |
| }; |
| |
| } // namespace blink |
| |
| #endif |