PlatformThemeChromiumGtk.cpp [plain text]
#include "config.h"
#include "PlatformThemeChromiumGtk.h"
namespace WebCore {
unsigned PlatformThemeChromiumGtk::s_thumbInactiveColor = 0xeaeaea;
unsigned PlatformThemeChromiumGtk::s_thumbActiveColor = 0xf4f4f4;
unsigned PlatformThemeChromiumGtk::s_trackColor = 0xd3d3d3;
void PlatformThemeChromiumGtk::setScrollbarColors(
SkColor inactiveColor, SkColor activeColor, SkColor trackColor)
{
s_thumbInactiveColor = inactiveColor;
s_thumbActiveColor = activeColor;
s_trackColor = trackColor;
}
static SkScalar clamp(SkScalar value, SkScalar min, SkScalar max)
{
return std::min(std::max(value, min), max);
}
SkColor PlatformThemeChromiumGtk::saturateAndBrighten(const SkScalar hsv[3], SkScalar saturateAmount, SkScalar brightenAmount)
{
SkScalar color[3];
color[0] = hsv[0];
color[1] = clamp(hsv[1] + saturateAmount, 0.0, 1.0);
color[2] = clamp(hsv[2] + brightenAmount, 0.0, 1.0);
return SkHSVToColor(color);
}
SkColor PlatformThemeChromiumGtk::outlineColor(const SkScalar hsv1[3], const SkScalar hsv2[3])
{
SkScalar minDiff = clamp((hsv1[1] + hsv2[1]) * 1.2, 0.28, 0.5);
SkScalar diff = clamp(fabs(hsv1[2] - hsv2[2]) / 2, minDiff, 0.5);
if (hsv1[2] + hsv2[2] > 1.0)
diff = -diff;
return saturateAndBrighten(hsv2, -0.2, diff);
}
void PlatformThemeChromiumGtk::paintArrowButton(GraphicsContext* gc, const IntRect& rect, ArrowDirection direction, ControlStates states)
{
SkCanvas* const canvas = gc->platformContext()->canvas();
int widthMiddle, lengthMiddle;
SkPaint paint;
if (direction == North || direction == South) {
widthMiddle = rect.width() / 2 + 1;
lengthMiddle = rect.height() / 2 + 1;
} else {
lengthMiddle = rect.width() / 2 + 1;
widthMiddle = rect.height() / 2 + 1;
}
SkScalar trackHSV[3];
SkColorToHSV(trackColor(), trackHSV);
SkColor buttonColor = saturateAndBrighten(trackHSV, 0, 0.2);
SkColor backgroundColor = buttonColor;
if (states & PressedState) {
SkScalar buttonHSV[3];
SkColorToHSV(buttonColor, buttonHSV);
buttonColor = saturateAndBrighten(buttonHSV, 0, -0.1);
} else if (states & HoverState) {
SkScalar buttonHSV[3];
SkColorToHSV(buttonColor, buttonHSV);
buttonColor = saturateAndBrighten(buttonHSV, 0, 0.05);
}
SkIRect skrect;
skrect.set(rect.x(), rect.y(), rect.x() + rect.width(), rect.y() + rect.height());
paint.setColor(backgroundColor);
canvas->drawIRect(skrect, paint);
SkPath outline;
switch (direction) {
case North:
outline.moveTo(rect.x() + 0.5, rect.y() + rect.height() + 0.5);
outline.rLineTo(0, -(rect.height() - 2));
outline.rLineTo(2, -2);
outline.rLineTo(rect.width() - 5, 0);
outline.rLineTo(2, 2);
outline.rLineTo(0, rect.height() - 2);
break;
case South:
outline.moveTo(rect.x() + 0.5, rect.y() - 0.5);
outline.rLineTo(0, rect.height() - 2);
outline.rLineTo(2, 2);
outline.rLineTo(rect.width() - 5, 0);
outline.rLineTo(2, -2);
outline.rLineTo(0, -(rect.height() - 2));
break;
case East:
outline.moveTo(rect.x() - 0.5, rect.y() + 0.5);
outline.rLineTo(rect.width() - 2, 0);
outline.rLineTo(2, 2);
outline.rLineTo(0, rect.height() - 5);
outline.rLineTo(-2, 2);
outline.rLineTo(-(rect.width() - 2), 0);
break;
case West:
outline.moveTo(rect.x() + rect.width() + 0.5, rect.y() + 0.5);
outline.rLineTo(-(rect.width() - 2), 0);
outline.rLineTo(-2, 2);
outline.rLineTo(0, rect.height() - 5);
outline.rLineTo(2, 2);
outline.rLineTo(rect.width() - 2, 0);
break;
}
outline.close();
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(buttonColor);
canvas->drawPath(outline, paint);
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
SkScalar thumbHSV[3];
SkColorToHSV(thumbInactiveColor(), thumbHSV);
paint.setColor(outlineColor(trackHSV, thumbHSV));
canvas->drawPath(outline, paint);
if (states & EnabledState && !(states & ReadOnlyState))
paint.setColor(SK_ColorBLACK);
paint.setAntiAlias(false);
paint.setStyle(SkPaint::kFill_Style);
SkPath path;
switch (direction) {
case North:
path.moveTo(rect.x() + widthMiddle - 4, rect.y() + lengthMiddle + 2);
path.rLineTo(7, 0);
path.rLineTo(-4, -4);
break;
case South:
path.moveTo(rect.x() + widthMiddle - 4, rect.y() + lengthMiddle - 3);
path.rLineTo(7, 0);
path.rLineTo(-4, 4);
break;
case East:
path.moveTo(rect.x() + lengthMiddle - 3, rect.y() + widthMiddle - 4);
path.rLineTo(0, 7);
path.rLineTo(4, -4);
break;
case West:
path.moveTo(rect.x() + lengthMiddle + 1, rect.y() + widthMiddle - 5);
path.rLineTo(0, 9);
path.rLineTo(-4, -4);
break;
}
path.close();
canvas->drawPath(path, paint);
}
}