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1 /* | |
2 * Copyright (C) 2009 Google Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
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. | |
29 */ | |
30 | |
31 #ifndef WebWidget_h | |
32 #define WebWidget_h | |
33 | |
34 #include "WebCanvas.h" | |
35 #include "WebCommon.h" | |
36 #include "WebCompositionCommand.h" | |
37 #include "WebTextDirection.h" | |
38 | |
39 namespace WebKit { | |
40 | |
41 class WebInputEvent; | |
42 class WebString; | |
43 struct WebRect; | |
44 struct WebSize; | |
45 | |
46 class WebWidget { | |
47 public: | |
48 // This method closes and deletes the WebWidget. | |
49 virtual void close() = 0; | |
50 | |
51 // Returns the current size of the WebWidget. | |
52 virtual WebSize size() = 0; | |
53 | |
54 // Called to resize the WebWidget. | |
55 virtual void resize(const WebSize&) = 0; | |
56 | |
57 // Called to layout the WebWidget. This MUST be called before Paint, | |
58 // and it may result in calls to WebWidgetClient::didInvalidateRect. | |
59 virtual void layout() = 0; | |
60 | |
61 // Called to paint the specified region of the WebWidget onto the given | |
62 // canvas. You MUST call Layout before calling this method. It is | |
63 // okay to call paint multiple times once layout has been called, | |
64 // assuming no other changes are made to the WebWidget (e.g., once | |
65 // events are processed, it should be assumed that another call to | |
66 // layout is warranted before painting again). | |
67 virtual void paint(WebCanvas*, const WebRect&) = 0; | |
68 | |
69 // Called to inform the WebWidget of an input event. Returns true if | |
70 // the event has been processed, false otherwise. | |
71 virtual bool handleInputEvent(const WebInputEvent&) = 0; | |
72 | |
73 // Called to inform the WebWidget that mouse capture was lost. | |
74 virtual void mouseCaptureLost() = 0; | |
75 | |
76 // Called to inform the WebWidget that it has gained or lost keyboard focus. | |
77 virtual void setFocus(bool) = 0; | |
78 | |
79 // Called to inform the WebWidget of a composition event. | |
80 virtual bool handleCompositionEvent(WebCompositionCommand command, | |
81 int cursorPosition, | |
82 int targetStart, | |
83 int targetEnd, | |
84 const WebString& text) = 0; | |
85 | |
86 // Retrieve the status of this WebWidget required by IME APIs. Upon | |
87 // success enabled and caretBounds are set. | |
88 virtual bool queryCompositionStatus(bool* enabled, WebRect* caretBounds) = 0; | |
89 | |
90 // Changes the text direction of the selected input node. | |
91 virtual void setTextDirection(WebTextDirection) = 0; | |
92 | |
93 protected: | |
94 ~WebWidget() { } | |
95 }; | |
96 | |
97 } // namespace WebKit | |
98 | |
99 #endif | |
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