/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
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* 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
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* contributors may be used to endorse or promote products derived from
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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*/
#ifndef WebThemeEngine_h
#define WebThemeEngine_h
#include "WebCanvas.h"
#include "WebColor.h"
#include "WebSize.h"
namespace blink {
struct WebRect;
// FIXME: crbug.com/327471. We need to merge the Apple and non-Apple implementations.
class WebThemeEngine {
public:
// The current state of the associated Part.
enum State {
StateDisabled,
StateHover, // non-Apple
StateNormal, // non-Apple
StatePressed,
StateFocused, // non-Apple
StateReadonly, // non-Apple
StateInactive, // Apple-specific
StateActive, // Apple-specific
};
// FIXME: The next section describes stuff only used on the Apple port.
enum Size {
SizeRegular,
SizeSmall,
};
enum ScrollbarOrientation {
ScrollbarOrientationHorizontal,
ScrollbarOrientationVertical,
};
enum ScrollbarParent {
ScrollbarParentScrollView,
ScrollbarParentRenderLayer,
};
struct ScrollbarInfo {
ScrollbarOrientation orientation;
ScrollbarParent parent;
int maxValue;
int currentValue;
int visibleSize;
int totalSize;
};
virtual void paintScrollbarThumb(WebCanvas*, State, Size, const WebRect&, const ScrollbarInfo&) { }
// FIXME: The remaining definitions are only used on the non-Apple ports.
// The UI part which is being accessed.
enum Part {
// ScrollbarTheme parts
PartScrollbarDownArrow,
PartScrollbarLeftArrow,
PartScrollbarRightArrow,
PartScrollbarUpArrow,
PartScrollbarHorizontalThumb,
PartScrollbarVerticalThumb,
PartScrollbarHorizontalTrack,
PartScrollbarVerticalTrack,
PartScrollbarCorner,
// RenderTheme parts
PartCheckbox,
PartRadio,
PartButton,
PartTextField,
PartMenuList,
PartSliderTrack,
PartSliderThumb,
PartInnerSpinButton,
PartProgressBar
};
// Extra parameters for drawing the PartScrollbarHorizontalTrack and
// PartScrollbarVerticalTrack.
struct ScrollbarTrackExtraParams {
bool isBack; // Whether this is the 'back' part or the 'forward' part.
// The bounds of the entire track, as opposed to the part being painted.
int trackX;
int trackY;
int trackWidth;
int trackHeight;
};
// Extra parameters for PartCheckbox, PartPushButton and PartRadio.
struct ButtonExtraParams {
bool checked;
bool indeterminate; // Whether the button state is indeterminate.
bool isDefault; // Whether the button is default button.
bool hasBorder;
WebColor backgroundColor;
};
// Extra parameters for PartTextField
struct TextFieldExtraParams {
bool isTextArea;
bool isListbox;
WebColor backgroundColor;
};
// Extra parameters for PartMenuList
struct MenuListExtraParams {
bool hasBorder;
bool hasBorderRadius;
int arrowX;
int arrowY;
int arrowHeight;
WebColor backgroundColor;
bool fillContentArea;
};
// Extra parameters for PartSliderTrack and PartSliderThumb
struct SliderExtraParams {
bool vertical;
bool inDrag;
};
// Extra parameters for PartInnerSpinButton
struct InnerSpinButtonExtraParams {
bool spinUp;
bool readOnly;
};
// Extra parameters for PartProgressBar
struct ProgressBarExtraParams {
bool determinate;
int valueRectX;
int valueRectY;
int valueRectWidth;
int valueRectHeight;
};
union ExtraParams {
ScrollbarTrackExtraParams scrollbarTrack;
ButtonExtraParams button;
TextFieldExtraParams textField;
MenuListExtraParams menuList;
SliderExtraParams slider;
InnerSpinButtonExtraParams innerSpin;
ProgressBarExtraParams progressBar;
};
// Gets the size of the given theme part. For variable sized items
// like vertical scrollbar thumbs, the width will be the required width of
// the track while the height will be the minimum height.
virtual WebSize getSize(Part) { return WebSize(); }
// Paint the given the given theme part.
virtual void paint(WebCanvas*, Part, State, const WebRect&, const ExtraParams*) { }
};
} // namespace blink
#endif