flutter_flutter/engine/public/platform/WebFallbackThemeEngine.h
Ojan Vafai 2793661b5a Remove scroll corners and resizers.
We never paint scroll corners. The only thing we need them
for is so that the vertical and horizontal scrollbars don't
overlap each other. So, that's the only place left that
still computes a scroll corner rect.

We don't support resizers. Remove the code for them as well
as the CSS resize property.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/689283003
2014-11-07 09:46:16 -08:00

144 lines
4.5 KiB
C++

/*
* Copyright (C) 2010 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 WebFallbackThemeEngine_h
#define WebFallbackThemeEngine_h
#include "WebCanvas.h"
#include "WebColor.h"
#include "WebSize.h"
namespace blink {
struct WebRect;
class WebFallbackThemeEngine {
public:
// The UI part which is being accessed.
enum Part {
// ScrollbarTheme parts
PartScrollbarDownArrow,
PartScrollbarLeftArrow,
PartScrollbarRightArrow,
PartScrollbarUpArrow,
PartScrollbarHorizontalThumb,
PartScrollbarVerticalThumb,
PartScrollbarHorizontalTrack,
PartScrollbarVerticalTrack,
// RenderTheme parts
PartCheckbox,
PartRadio,
PartButton,
PartMenuList,
PartSliderTrack,
PartSliderThumb,
PartInnerSpinButton,
PartProgressBar
};
// The current state of the associated Part.
enum State {
StateDisabled,
StateHover,
StateNormal,
StatePressed,
};
// Extra parameters for drawing the PartScrollbarHorizontalTrack and
// PartScrollbarVerticalTrack.
struct ScrollbarTrackExtraParams {
// 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 PartMenuList
struct MenuListExtraParams {
bool hasBorder;
bool hasBorderRadius;
int arrowX;
int arrowY;
WebColor backgroundColor;
};
// 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;
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