WebWidget.h 4.45 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
/*
 * 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 WebWidget_h
#define WebWidget_h

#include "WebCanvas.h"
#include "WebCommon.h"
36 37
#include "WebCompositionUnderline.h"
#include "WebTextInputType.h"
38 39 40 41 42 43 44 45
#include "WebTextDirection.h"

namespace WebKit {

class WebInputEvent;
class WebString;
struct WebRect;
struct WebSize;
46
template <typename T> class WebVector;
47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

class WebWidget {
public:
    // This method closes and deletes the WebWidget.
    virtual void close() = 0;

    // Returns the current size of the WebWidget.
    virtual WebSize size() = 0;

    // Called to resize the WebWidget.
    virtual void resize(const WebSize&) = 0;

    // Called to layout the WebWidget.  This MUST be called before Paint,
    // and it may result in calls to WebWidgetClient::didInvalidateRect.
    virtual void layout() = 0;

    // Called to paint the specified region of the WebWidget onto the given
    // canvas.  You MUST call Layout before calling this method.  It is
    // okay to call paint multiple times once layout has been called,
    // assuming no other changes are made to the WebWidget (e.g., once
    // events are processed, it should be assumed that another call to
    // layout is warranted before painting again).
    virtual void paint(WebCanvas*, const WebRect&) = 0;

    // Called to inform the WebWidget of an input event.  Returns true if
    // the event has been processed, false otherwise.
    virtual bool handleInputEvent(const WebInputEvent&) = 0;

    // Called to inform the WebWidget that mouse capture was lost.
    virtual void mouseCaptureLost() = 0;

    // Called to inform the WebWidget that it has gained or lost keyboard focus.
    virtual void setFocus(bool) = 0;

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
    // Called to inform the WebWidget of a new composition text.
    // If selectionStart and selectionEnd has the same value, then it indicates
    // the input caret position. If the text is empty, then the existing
    // composition text will be cancelled.
    // Returns true if the composition text was set successfully.
    virtual bool setComposition(
        const WebString& text,
        const WebVector<WebCompositionUnderline>& underlines,
        int selectionStart,
        int selectionEnd) = 0;

    // Called to inform the WebWidget to confirm an ongoing composition.
    // Returns true if there is an ongoing composition.
    virtual bool confirmComposition() = 0;

    // Returns the current text input type of this WebWidget.
    virtual WebTextInputType textInputType() = 0;

    // Returns the current caret bounds of this WebWidget. The selection bounds
    // will be returned if a selection range is available.
    virtual WebRect caretOrSelectionBounds() = 0;

103 104 105
    // Changes the text direction of the selected input node.
    virtual void setTextDirection(WebTextDirection) = 0;

106 107 108 109
    // Returns true if the WebWidget uses GPU accelerated compositing
    // to render its contents.
    virtual bool isAcceleratedCompositingActive() const = 0;

110 111 112 113 114 115 116
protected:
    ~WebWidget() { }
};

} // namespace WebKit

#endif