256 lines
10 KiB
C++
256 lines
10 KiB
C++
// Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ---------------------------------------------------------------------------
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//
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// The contents of this file must follow a specific format in order to
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// support the CEF translator tool. See the translator.README.txt file in the
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// tools directory for more information.
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//
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#ifndef CEF_INCLUDE_CEF_RENDER_HANDLER_H_
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#define CEF_INCLUDE_CEF_RENDER_HANDLER_H_
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#pragma once
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#include <vector>
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#include "include/cef_accessibility_handler.h"
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#include "include/cef_base.h"
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#include "include/cef_browser.h"
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#include "include/cef_drag_data.h"
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///
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/// Implement this interface to handle events when window rendering is disabled.
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/// The methods of this class will be called on the UI thread.
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///
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/*--cef(source=client)--*/
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class CefRenderHandler : public virtual CefBaseRefCounted {
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public:
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typedef cef_drag_operations_mask_t DragOperation;
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typedef cef_drag_operations_mask_t DragOperationsMask;
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typedef cef_paint_element_type_t PaintElementType;
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typedef std::vector<CefRect> RectList;
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typedef cef_text_input_mode_t TextInputMode;
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///
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/// Return the handler for accessibility notifications. If no handler is
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/// provided the default implementation will be used.
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///
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/*--cef()--*/
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virtual CefRefPtr<CefAccessibilityHandler> GetAccessibilityHandler() {
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return nullptr;
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}
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///
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/// Called to retrieve the root window rectangle in screen DIP coordinates.
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/// Return true if the rectangle was provided. If this method returns false
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/// the rectangle from GetViewRect will be used.
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///
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/*--cef()--*/
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virtual bool GetRootScreenRect(CefRefPtr<CefBrowser> browser, CefRect& rect) {
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return false;
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}
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///
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/// Called to retrieve the view rectangle in screen DIP coordinates. This
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/// method must always provide a non-empty rectangle.
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///
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/*--cef()--*/
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virtual void GetViewRect(CefRefPtr<CefBrowser> browser, CefRect& rect) = 0;
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///
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/// Called to retrieve the translation from view DIP coordinates to screen
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/// coordinates. Windows/Linux should provide screen device (pixel)
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/// coordinates and MacOS should provide screen DIP coordinates. Return true
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/// if the requested coordinates were provided.
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///
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/*--cef()--*/
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virtual bool GetScreenPoint(CefRefPtr<CefBrowser> browser,
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int viewX,
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int viewY,
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int& screenX,
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int& screenY) {
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return false;
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}
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///
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/// Called to allow the client to fill in the CefScreenInfo object with
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/// appropriate values. Return true if the |screen_info| structure has been
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/// modified.
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///
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/// If the screen info rectangle is left empty the rectangle from GetViewRect
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/// will be used. If the rectangle is still empty or invalid popups may not be
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/// drawn correctly.
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///
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/*--cef()--*/
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virtual bool GetScreenInfo(CefRefPtr<CefBrowser> browser,
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CefScreenInfo& screen_info) {
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return false;
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}
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///
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/// Called when the browser wants to show or hide the popup widget. The popup
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/// should be shown if |show| is true and hidden if |show| is false.
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///
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/*--cef()--*/
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virtual void OnPopupShow(CefRefPtr<CefBrowser> browser, bool show) {}
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///
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/// Called when the browser wants to move or resize the popup widget. |rect|
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/// contains the new location and size in view coordinates.
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///
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/*--cef()--*/
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virtual void OnPopupSize(CefRefPtr<CefBrowser> browser, const CefRect& rect) {
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}
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///
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/// Called when an element should be painted. Pixel values passed to this
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/// method are scaled relative to view coordinates based on the value of
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/// CefScreenInfo.device_scale_factor returned from GetScreenInfo. |type|
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/// indicates whether the element is the view or the popup widget. |buffer|
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/// contains the pixel data for the whole image. |dirtyRects| contains the set
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/// of rectangles in pixel coordinates that need to be repainted. |buffer|
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/// will be |width|*|height|*4 bytes in size and represents a BGRA image with
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/// an upper-left origin. This method is only called when
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/// CefWindowInfo::shared_texture_enabled is set to false.
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///
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/*--cef()--*/
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virtual void OnPaint(CefRefPtr<CefBrowser> browser,
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PaintElementType type,
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const RectList& dirtyRects,
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const void* buffer,
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int width,
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int height) = 0;
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///
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/// Called when an element has been rendered to the shared texture handle.
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/// |type| indicates whether the element is the view or the popup widget.
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/// |dirtyRects| contains the set of rectangles in pixel coordinates that need
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/// to be repainted. |shared_handle| is the handle for a D3D11 Texture2D that
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/// can be accessed via ID3D11Device using the OpenSharedResource method. This
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/// method is only called when CefWindowInfo::shared_texture_enabled is set to
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/// true, and is currently only supported on Windows.
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///
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/*--cef()--*/
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virtual void OnAcceleratedPaint(CefRefPtr<CefBrowser> browser,
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PaintElementType type,
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const RectList& dirtyRects,
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void* shared_handle) {}
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///
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/// Called to retrieve the size of the touch handle for the specified
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/// |orientation|.
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///
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/*--cef()--*/
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virtual void GetTouchHandleSize(CefRefPtr<CefBrowser> browser,
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cef_horizontal_alignment_t orientation,
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CefSize& size) {}
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///
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/// Called when touch handle state is updated. The client is responsible for
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/// rendering the touch handles.
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///
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/*--cef()--*/
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virtual void OnTouchHandleStateChanged(CefRefPtr<CefBrowser> browser,
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const CefTouchHandleState& state) {}
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///
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/// Called when the user starts dragging content in the web view. Contextual
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/// information about the dragged content is supplied by |drag_data|.
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/// (|x|, |y|) is the drag start location in screen coordinates.
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/// OS APIs that run a system message loop may be used within the
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/// StartDragging call.
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///
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/// Return false to abort the drag operation. Don't call any of
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/// CefBrowserHost::DragSource*Ended* methods after returning false.
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///
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/// Return true to handle the drag operation. Call
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/// CefBrowserHost::DragSourceEndedAt and DragSourceSystemDragEnded either
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/// synchronously or asynchronously to inform the web view that the drag
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/// operation has ended.
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///
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/*--cef()--*/
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virtual bool StartDragging(CefRefPtr<CefBrowser> browser,
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CefRefPtr<CefDragData> drag_data,
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DragOperationsMask allowed_ops,
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int x,
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int y) {
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return false;
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}
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///
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/// Called when the web view wants to update the mouse cursor during a
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/// drag & drop operation. |operation| describes the allowed operation
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/// (none, move, copy, link).
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///
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/*--cef()--*/
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virtual void UpdateDragCursor(CefRefPtr<CefBrowser> browser,
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DragOperation operation) {}
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///
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/// Called when the scroll offset has changed.
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///
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/*--cef()--*/
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virtual void OnScrollOffsetChanged(CefRefPtr<CefBrowser> browser,
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double x,
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double y) {}
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///
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/// Called when the IME composition range has changed. |selected_range| is the
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/// range of characters that have been selected. |character_bounds| is the
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/// bounds of each character in view coordinates.
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///
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/*--cef()--*/
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virtual void OnImeCompositionRangeChanged(CefRefPtr<CefBrowser> browser,
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const CefRange& selected_range,
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const RectList& character_bounds) {}
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///
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/// Called when text selection has changed for the specified |browser|.
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/// |selected_text| is the currently selected text and |selected_range| is
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/// the character range.
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///
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/*--cef(optional_param=selected_text,optional_param=selected_range)--*/
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virtual void OnTextSelectionChanged(CefRefPtr<CefBrowser> browser,
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const CefString& selected_text,
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const CefRange& selected_range) {}
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///
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/// Called when an on-screen keyboard should be shown or hidden for the
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/// specified |browser|. |input_mode| specifies what kind of keyboard
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/// should be opened. If |input_mode| is CEF_TEXT_INPUT_MODE_NONE, any
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/// existing keyboard for this browser should be hidden.
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///
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/*--cef()--*/
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virtual void OnVirtualKeyboardRequested(CefRefPtr<CefBrowser> browser,
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TextInputMode input_mode) {}
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};
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#endif // CEF_INCLUDE_CEF_RENDER_HANDLER_H_
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