1 // Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
3 // Redistribution and use in source and binary forms, with or without
4 // modification, are permitted provided that the following conditions are
7 // * Redistributions of source code must retain the above copyright
8 // notice, this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above
10 // copyright notice, this list of conditions and the following disclaimer
11 // in the documentation and/or other materials provided with the
13 // * Neither the name of Google Inc. nor the name Chromium Embedded
14 // Framework nor the names of its contributors may be used to endorse
15 // or promote products derived from this software without specific prior
16 // written permission.
18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 // ---------------------------------------------------------------------------
32 // The contents of this file must follow a specific format in order to
33 // support the CEF translator tool. See the translator.README.txt file in the
34 // tools directory for more information.
37 #ifndef CEF_INCLUDE_CEF_RENDER_HANDLER_H_
38 #define CEF_INCLUDE_CEF_RENDER_HANDLER_H_
41 #include "include/cef_base.h"
42 #include "include/cef_browser.h"
43 #include "include/cef_drag_data.h"
47 // Implement this interface to handle events when window rendering is disabled.
48 // The methods of this class will be called on the UI thread.
50 /*--cef(source=client)--*/
51 class CefRenderHandler : public virtual CefBase {
53 typedef cef_cursor_type_t CursorType;
54 typedef cef_drag_operations_mask_t DragOperation;
55 typedef cef_drag_operations_mask_t DragOperationsMask;
56 typedef cef_paint_element_type_t PaintElementType;
57 typedef std::vector<CefRect> RectList;
60 // Called to retrieve the root window rectangle in screen coordinates. Return
61 // true if the rectangle was provided.
64 virtual bool GetRootScreenRect(CefRefPtr<CefBrowser> browser,
65 CefRect& rect) { return false; }
68 // Called to retrieve the view rectangle which is relative to screen
69 // coordinates. Return true if the rectangle was provided.
72 virtual bool GetViewRect(CefRefPtr<CefBrowser> browser, CefRect& rect) =0;
75 // Called to retrieve the translation from view coordinates to actual screen
76 // coordinates. Return true if the screen coordinates were provided.
79 virtual bool GetScreenPoint(CefRefPtr<CefBrowser> browser,
83 int& screenY) { return false; }
86 // Called to allow the client to fill in the CefScreenInfo object with
87 // appropriate values. Return true if the |screen_info| structure has been
90 // If the screen info rectangle is left empty the rectangle from GetViewRect
91 // will be used. If the rectangle is still empty or invalid popups may not be
95 virtual bool GetScreenInfo(CefRefPtr<CefBrowser> browser,
96 CefScreenInfo& screen_info) { return false; }
99 // Called when the browser wants to show or hide the popup widget. The popup
100 // should be shown if |show| is true and hidden if |show| is false.
103 virtual void OnPopupShow(CefRefPtr<CefBrowser> browser,
107 // Called when the browser wants to move or resize the popup widget. |rect|
108 // contains the new location and size in view coordinates.
111 virtual void OnPopupSize(CefRefPtr<CefBrowser> browser,
112 const CefRect& rect) {}
115 // Called when an element should be painted. Pixel values passed to this
116 // method are scaled relative to view coordinates based on the value of
117 // CefScreenInfo.device_scale_factor returned from GetScreenInfo. |type|
118 // indicates whether the element is the view or the popup widget. |buffer|
119 // contains the pixel data for the whole image. |dirtyRects| contains the set
120 // of rectangles in pixel coordinates that need to be repainted. |buffer| will
121 // be |width|*|height|*4 bytes in size and represents a BGRA image with an
122 // upper-left origin.
125 virtual void OnPaint(CefRefPtr<CefBrowser> browser,
126 PaintElementType type,
127 const RectList& dirtyRects,
129 int width, int height) =0;
132 // Called when the browser's cursor has changed. If |type| is CT_CUSTOM then
133 // |custom_cursor_info| will be populated with the custom cursor information.
136 virtual void OnCursorChange(CefRefPtr<CefBrowser> browser,
137 CefCursorHandle cursor,
139 const CefCursorInfo& custom_cursor_info) {}
142 // Called when the user starts dragging content in the web view. Contextual
143 // information about the dragged content is supplied by |drag_data|.
144 // (|x|, |y|) is the drag start location in screen coordinates.
145 // OS APIs that run a system message loop may be used within the
146 // StartDragging call.
148 // Return false to abort the drag operation. Don't call any of
149 // CefBrowserHost::DragSource*Ended* methods after returning false.
151 // Return true to handle the drag operation. Call
152 // CefBrowserHost::DragSourceEndedAt and DragSourceSystemDragEnded either
153 // synchronously or asynchronously to inform the web view that the drag
154 // operation has ended.
157 virtual bool StartDragging(CefRefPtr<CefBrowser> browser,
158 CefRefPtr<CefDragData> drag_data,
159 DragOperationsMask allowed_ops,
160 int x, int y) { return false; }
163 // Called when the web view wants to update the mouse cursor during a
164 // drag & drop operation. |operation| describes the allowed operation
165 // (none, move, copy, link).
168 virtual void UpdateDragCursor(CefRefPtr<CefBrowser> browser,
169 DragOperation operation) {}
172 // Called when the scroll offset has changed.
175 virtual void OnScrollOffsetChanged(CefRefPtr<CefBrowser> browser,
180 #endif // CEF_INCLUDE_CEF_RENDER_HANDLER_H_