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_
43 #include "include/cef_base.h"
44 #include "include/cef_browser.h"
45 #include "include/cef_drag_data.h"
48 // Implement this interface to handle events when window rendering is disabled.
49 // The methods of this class will be called on the UI thread.
51 /*--cef(source=client)--*/
52 class CefRenderHandler : public virtual CefBaseRefCounted {
54 typedef cef_cursor_type_t CursorType;
55 typedef cef_drag_operations_mask_t DragOperation;
56 typedef cef_drag_operations_mask_t DragOperationsMask;
57 typedef cef_paint_element_type_t PaintElementType;
58 typedef std::vector<CefRect> RectList;
61 // Called to retrieve the root window rectangle in screen coordinates. Return
62 // true if the rectangle was provided.
65 virtual bool GetRootScreenRect(CefRefPtr<CefBrowser> browser,
66 CefRect& rect) { return false; }
69 // Called to retrieve the view rectangle which is relative to screen
70 // coordinates. Return true if the rectangle was provided.
73 virtual bool GetViewRect(CefRefPtr<CefBrowser> browser, CefRect& rect) =0;
76 // Called to retrieve the translation from view coordinates to actual screen
77 // coordinates. Return true if the screen coordinates were provided.
80 virtual bool GetScreenPoint(CefRefPtr<CefBrowser> browser,
84 int& screenY) { return false; }
87 // Called to allow the client to fill in the CefScreenInfo object with
88 // appropriate values. Return true if the |screen_info| structure has been
91 // If the screen info rectangle is left empty the rectangle from GetViewRect
92 // will be used. If the rectangle is still empty or invalid popups may not be
96 virtual bool GetScreenInfo(CefRefPtr<CefBrowser> browser,
97 CefScreenInfo& screen_info) { return false; }
100 // Called when the browser wants to show or hide the popup widget. The popup
101 // should be shown if |show| is true and hidden if |show| is false.
104 virtual void OnPopupShow(CefRefPtr<CefBrowser> browser,
108 // Called when the browser wants to move or resize the popup widget. |rect|
109 // contains the new location and size in view coordinates.
112 virtual void OnPopupSize(CefRefPtr<CefBrowser> browser,
113 const CefRect& rect) {}
116 // Called when an element should be painted. Pixel values passed to this
117 // method are scaled relative to view coordinates based on the value of
118 // CefScreenInfo.device_scale_factor returned from GetScreenInfo. |type|
119 // indicates whether the element is the view or the popup widget. |buffer|
120 // contains the pixel data for the whole image. |dirtyRects| contains the set
121 // of rectangles in pixel coordinates that need to be repainted. |buffer| will
122 // be |width|*|height|*4 bytes in size and represents a BGRA image with an
123 // upper-left origin.
126 virtual void OnPaint(CefRefPtr<CefBrowser> browser,
127 PaintElementType type,
128 const RectList& dirtyRects,
130 int width, int height) =0;
133 // Called when the browser's cursor has changed. If |type| is CT_CUSTOM then
134 // |custom_cursor_info| will be populated with the custom cursor information.
137 virtual void OnCursorChange(CefRefPtr<CefBrowser> browser,
138 CefCursorHandle cursor,
140 const CefCursorInfo& custom_cursor_info) {}
143 // Called when the user starts dragging content in the web view. Contextual
144 // information about the dragged content is supplied by |drag_data|.
145 // (|x|, |y|) is the drag start location in screen coordinates.
146 // OS APIs that run a system message loop may be used within the
147 // StartDragging call.
149 // Return false to abort the drag operation. Don't call any of
150 // CefBrowserHost::DragSource*Ended* methods after returning false.
152 // Return true to handle the drag operation. Call
153 // CefBrowserHost::DragSourceEndedAt and DragSourceSystemDragEnded either
154 // synchronously or asynchronously to inform the web view that the drag
155 // operation has ended.
158 virtual bool StartDragging(CefRefPtr<CefBrowser> browser,
159 CefRefPtr<CefDragData> drag_data,
160 DragOperationsMask allowed_ops,
161 int x, int y) { return false; }
164 // Called when the web view wants to update the mouse cursor during a
165 // drag & drop operation. |operation| describes the allowed operation
166 // (none, move, copy, link).
169 virtual void UpdateDragCursor(CefRefPtr<CefBrowser> browser,
170 DragOperation operation) {}
173 // Called when the scroll offset has changed.
176 virtual void OnScrollOffsetChanged(CefRefPtr<CefBrowser> browser,
181 // Called when the IME composition range has changed. |selected_range| is the
182 // range of characters that have been selected. |character_bounds| is the
183 // bounds of each character in view coordinates.
186 virtual void OnImeCompositionRangeChanged(CefRefPtr<CefBrowser> browser,
187 const CefRange& selected_range,
188 const RectList& character_bounds) {}
191 #endif // CEF_INCLUDE_CEF_RENDER_HANDLER_H_