// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/native_theme/native_theme_base.h"
#include <limits>
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "grit/ui_resources.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
#include "ui/base/layout.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/ui_base_switches.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/color_utils.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
#include "ui/gfx/skia_util.h"
#include "ui/native_theme/common_theme.h"
namespace {
// These are the default dimensions of radio buttons and checkboxes.
const int kCheckboxAndRadioWidth = 13;
const int kCheckboxAndRadioHeight = 13;
// These sizes match the sizes in Chromium Win.
const int kSliderThumbWidth = 11;
const int kSliderThumbHeight = 21;
const SkColor kSliderTrackBackgroundColor =
SkColorSetRGB(0xe3, 0xdd, 0xd8);
const SkColor kSliderThumbLightGrey = SkColorSetRGB(0xf4, 0xf2, 0xef);
const SkColor kSliderThumbDarkGrey = SkColorSetRGB(0xea, 0xe5, 0xe0);
const SkColor kSliderThumbBorderDarkGrey =
SkColorSetRGB(0x9d, 0x96, 0x8e);
const SkColor kTextBorderColor = SkColorSetRGB(0xa9, 0xa9, 0xa9);
const SkColor kMenuPopupBackgroundColor = SkColorSetRGB(210, 225, 246);
const unsigned int kDefaultScrollbarWidth = 15;
const unsigned int kDefaultScrollbarButtonLength = 14;
const SkColor kCheckboxTinyColor = SK_ColorGRAY;
const SkColor kCheckboxShadowColor = SkColorSetARGB(0x15, 0, 0, 0);
const SkColor kCheckboxShadowHoveredColor = SkColorSetARGB(0x1F, 0, 0, 0);
const SkColor kCheckboxShadowDisabledColor = SkColorSetARGB(0, 0, 0, 0);
const SkColor kCheckboxGradientColors[] = {
SkColorSetRGB(0xed, 0xed, 0xed),
SkColorSetRGB(0xde, 0xde, 0xde) };
const SkColor kCheckboxGradientPressedColors[] = {
SkColorSetRGB(0xe7, 0xe7, 0xe7),
SkColorSetRGB(0xd7, 0xd7, 0xd7) };
const SkColor kCheckboxGradientHoveredColors[] = {
SkColorSetRGB(0xf0, 0xf0, 0xf0),
SkColorSetRGB(0xe0, 0xe0, 0xe0) };
const SkColor kCheckboxGradientDisabledColors[] = {
SkColorSetARGB(0x80, 0xed, 0xed, 0xed),
SkColorSetARGB(0x80, 0xde, 0xde, 0xde) };
const SkColor kCheckboxBorderColor = SkColorSetARGB(0x40, 0, 0, 0);
const SkColor kCheckboxBorderHoveredColor = SkColorSetARGB(0x4D, 0, 0, 0);
const SkColor kCheckboxBorderDisabledColor = SkColorSetARGB(0x20, 0, 0, 0);
const SkColor kCheckboxStrokeColor = SkColorSetARGB(0xB3, 0, 0, 0);
const SkColor kCheckboxStrokeDisabledColor = SkColorSetARGB(0x59, 0, 0, 0);
const SkColor kRadioDotColor = SkColorSetRGB(0x66, 0x66, 0x66);
const SkColor kRadioDotDisabledColor = SkColorSetARGB(0x80, 0x66, 0x66, 0x66);
// Get lightness adjusted color.
SkColor BrightenColor(const color_utils::HSL& hsl, SkAlpha alpha,
double lightness_amount) {
color_utils::HSL adjusted = hsl;
adjusted.l += lightness_amount;
if (adjusted.l > 1.0)
adjusted.l = 1.0;
if (adjusted.l < 0.0)
adjusted.l = 0.0;
return color_utils::HSLToSkColor(adjusted, alpha);
}
} // namespace
namespace ui {
gfx::Size NativeThemeBase::GetPartSize(Part part,
State state,
const ExtraParams& extra) const {
gfx::Size size = CommonThemeGetPartSize(part, state, extra);
if (!size.IsEmpty())
return size;
switch (part) {
// Please keep these in the order of NativeTheme::Part.
case kCheckbox:
return gfx::Size(kCheckboxAndRadioWidth, kCheckboxAndRadioHeight);
case kInnerSpinButton:
return gfx::Size(scrollbar_width_, 0);
case kMenuList:
return gfx::Size(); // No default size.
case kMenuCheck:
case kMenuCheckBackground:
case kMenuPopupArrow:
NOTIMPLEMENTED();
break;
case kMenuPopupBackground:
return gfx::Size(); // No default size.
case kMenuPopupGutter:
case kMenuPopupSeparator:
NOTIMPLEMENTED();
break;
case kMenuItemBackground:
case kProgressBar:
case kPushButton:
return gfx::Size(); // No default size.
case kRadio:
return gfx::Size(kCheckboxAndRadioWidth, kCheckboxAndRadioHeight);
case kScrollbarDownArrow:
case kScrollbarUpArrow:
return gfx::Size(scrollbar_width_, scrollbar_button_length_);
case kScrollbarLeftArrow:
case kScrollbarRightArrow:
return gfx::Size(scrollbar_button_length_, scrollbar_width_);
case kScrollbarHorizontalThumb:
// This matches Firefox on Linux.
return gfx::Size(2 * scrollbar_width_, scrollbar_width_);
case kScrollbarVerticalThumb:
// This matches Firefox on Linux.
return gfx::Size(scrollbar_width_, 2 * scrollbar_width_);
case kScrollbarHorizontalTrack:
return gfx::Size(0, scrollbar_width_);
case kScrollbarVerticalTrack:
return gfx::Size(scrollbar_width_, 0);
case kScrollbarHorizontalGripper:
case kScrollbarVerticalGripper:
NOTIMPLEMENTED();
break;
case kSliderTrack:
return gfx::Size(); // No default size.
case kSliderThumb:
// These sizes match the sizes in Chromium Win.
return gfx::Size(kSliderThumbWidth, kSliderThumbHeight);
case kTabPanelBackground:
NOTIMPLEMENTED();
break;
case kTextField:
return gfx::Size(); // No default size.
case kTrackbarThumb:
case kTrackbarTrack:
case kWindowResizeGripper:
NOTIMPLEMENTED();
break;
default:
NOTREACHED() << "Unknown theme part: " << part;
break;
}
return gfx::Size();
}
void NativeThemeBase::PaintStateTransition(SkCanvas* canvas,
Part part,
State startState,
State endState,
double progress,
const gfx::Rect& rect) const {
if (rect.IsEmpty())
return;
// Currently state transition is animation only working for overlay scrollbars
// on Aura platforms.
switch (part) {
case kScrollbarHorizontalThumb:
case kScrollbarVerticalThumb:
PaintScrollbarThumbStateTransition(
canvas, startState, endState, progress, rect);
break;
default:
NOTREACHED() << "Does not support state transition for this part:"
<< part;
break;
}
return;
}
void NativeThemeBase::Paint(SkCanvas* canvas,
Part part,
State state,
const gfx::Rect& rect,
const ExtraParams& extra) const {
if (rect.IsEmpty())
return;
switch (part) {
// Please keep these in the order of NativeTheme::Part.
case kComboboxArrow:
CommonThemePaintComboboxArrow(canvas, rect);
break;
case kCheckbox:
PaintCheckbox(canvas, state, rect, extra.button);
break;
case kInnerSpinButton:
PaintInnerSpinButton(canvas, state, rect, extra.inner_spin);
break;
case kMenuList:
PaintMenuList(canvas, state, rect, extra.menu_list);
break;
case kMenuCheck:
case kMenuCheckBackground:
case kMenuPopupArrow:
NOTIMPLEMENTED();
break;
case kMenuPopupBackground:
PaintMenuPopupBackground(canvas, rect.size(), extra.menu_background);
break;
case kMenuPopupGutter:
case kMenuPopupSeparator:
NOTIMPLEMENTED();
break;
case kMenuItemBackground:
PaintMenuItemBackground(canvas, state, rect, extra.menu_list);
break;
case kProgressBar:
PaintProgressBar(canvas, state, rect, extra.progress_bar);
break;
case kPushButton:
PaintButton(canvas, state, rect, extra.button);
break;
case kRadio:
PaintRadio(canvas, state, rect, extra.button);
break;
case kScrollbarDownArrow:
case kScrollbarUpArrow:
case kScrollbarLeftArrow:
case kScrollbarRightArrow:
PaintArrowButton(canvas, rect, part, state);
break;
case kScrollbarHorizontalThumb:
case kScrollbarVerticalThumb:
PaintScrollbarThumb(canvas, part, state, rect);
break;
case kScrollbarHorizontalTrack:
case kScrollbarVerticalTrack:
PaintScrollbarTrack(canvas, part, state, extra.scrollbar_track, rect);
break;
case kScrollbarHorizontalGripper:
case kScrollbarVerticalGripper:
// Invoked by views scrollbar code, don't care about for non-win
// implementations, so no NOTIMPLEMENTED.
break;
case kScrollbarCorner:
PaintScrollbarCorner(canvas, state, rect);
break;
case kSliderTrack:
PaintSliderTrack(canvas, state, rect, extra.slider);
break;
case kSliderThumb:
PaintSliderThumb(canvas, state, rect, extra.slider);
break;
case kTabPanelBackground:
NOTIMPLEMENTED();
break;
case kTextField:
PaintTextField(canvas, state, rect, extra.text_field);
break;
case kTrackbarThumb:
case kTrackbarTrack:
case kWindowResizeGripper:
NOTIMPLEMENTED();
break;
default:
NOTREACHED() << "Unknown theme part: " << part;
break;
}
}
NativeThemeBase::NativeThemeBase()
: scrollbar_width_(kDefaultScrollbarWidth),
scrollbar_button_length_(kDefaultScrollbarButtonLength) {
}
NativeThemeBase::~NativeThemeBase() {
}
void NativeThemeBase::PaintArrowButton(
SkCanvas* canvas,
const gfx::Rect& rect, Part direction, State state) const {
SkPaint paint;
// Calculate button color.
SkScalar trackHSV[3];
SkColorToHSV(track_color_, trackHSV);
SkColor buttonColor = SaturateAndBrighten(trackHSV, 0, 0.2f);
SkColor backgroundColor = buttonColor;
if (state == kPressed) {
SkScalar buttonHSV[3];
SkColorToHSV(buttonColor, buttonHSV);
buttonColor = SaturateAndBrighten(buttonHSV, 0, -0.1f);
} else if (state == kHovered) {
SkScalar buttonHSV[3];
SkColorToHSV(buttonColor, buttonHSV);
buttonColor = SaturateAndBrighten(buttonHSV, 0, 0.05f);
}
SkIRect skrect;
skrect.set(rect.x(), rect.y(), rect.x() + rect.width(), rect.y()
+ rect.height());
// Paint the background (the area visible behind the rounded corners).
paint.setColor(backgroundColor);
canvas->drawIRect(skrect, paint);
// Paint the button's outline and fill the middle
SkPath outline;
switch (direction) {
case kScrollbarUpArrow:
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 kScrollbarDownArrow:
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 kScrollbarRightArrow:
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 kScrollbarLeftArrow:
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;
default:
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(thumb_inactive_color_, thumbHSV);
paint.setColor(OutlineColor(trackHSV, thumbHSV));
canvas->drawPath(outline, paint);
PaintArrow(canvas, rect, direction, GetArrowColor(state));
}
void NativeThemeBase::PaintArrow(SkCanvas* gc,
const gfx::Rect& rect,
Part direction,
SkColor color) const {
int width_middle, length_middle;
if (direction == kScrollbarUpArrow || direction == kScrollbarDownArrow) {
width_middle = rect.width() / 2 + 1;
length_middle = rect.height() / 2 + 1;
} else {
length_middle = rect.width() / 2 + 1;
width_middle = rect.height() / 2 + 1;
}
SkPaint paint;
paint.setColor(color);
paint.setAntiAlias(false);
paint.setStyle(SkPaint::kFill_Style);
SkPath path;
// The constants in this block of code are hand-tailored to produce good
// looking arrows without anti-aliasing.
switch (direction) {
case kScrollbarUpArrow:
path.moveTo(rect.x() + width_middle - 4, rect.y() + length_middle + 2);
path.rLineTo(7, 0);
path.rLineTo(-4, -4);
break;
case kScrollbarDownArrow:
path.moveTo(rect.x() + width_middle - 4, rect.y() + length_middle - 3);
path.rLineTo(7, 0);
path.rLineTo(-4, 4);
break;
case kScrollbarRightArrow:
path.moveTo(rect.x() + length_middle - 3, rect.y() + width_middle - 4);
path.rLineTo(0, 7);
path.rLineTo(4, -4);
break;
case kScrollbarLeftArrow:
path.moveTo(rect.x() + length_middle + 1, rect.y() + width_middle - 5);
path.rLineTo(0, 9);
path.rLineTo(-4, -4);
break;
default:
break;
}
path.close();
gc->drawPath(path, paint);
}
void NativeThemeBase::PaintScrollbarTrack(SkCanvas* canvas,
Part part,
State state,
const ScrollbarTrackExtraParams& extra_params,
const gfx::Rect& rect) const {
SkPaint paint;
SkIRect skrect;
skrect.set(rect.x(), rect.y(), rect.right(), rect.bottom());
SkScalar track_hsv[3];
SkColorToHSV(track_color_, track_hsv);
paint.setColor(SaturateAndBrighten(track_hsv, 0, 0));
canvas->drawIRect(skrect, paint);
SkScalar thumb_hsv[3];
SkColorToHSV(thumb_inactive_color_, thumb_hsv);
paint.setColor(OutlineColor(track_hsv, thumb_hsv));
DrawBox(canvas, rect, paint);
}
void NativeThemeBase::PaintScrollbarThumb(SkCanvas* canvas,
Part part,
State state,
const gfx::Rect& rect) const {
const bool hovered = state == kHovered;
const int midx = rect.x() + rect.width() / 2;
const int midy = rect.y() + rect.height() / 2;
const bool vertical = part == kScrollbarVerticalThumb;
SkScalar thumb[3];
SkColorToHSV(hovered ? thumb_active_color_ : thumb_inactive_color_, thumb);
SkPaint paint;
paint.setColor(SaturateAndBrighten(thumb, 0, 0.02f));
SkIRect skrect;
if (vertical)
skrect.set(rect.x(), rect.y(), midx + 1, rect.y() + rect.height());
else
skrect.set(rect.x(), rect.y(), rect.x() + rect.width(), midy + 1);
canvas->drawIRect(skrect, paint);
paint.setColor(SaturateAndBrighten(thumb, 0, -0.02f));
if (vertical) {
skrect.set(
midx + 1, rect.y(), rect.x() + rect.width(), rect.y() + rect.height());
} else {
skrect.set(
rect.x(), midy + 1, rect.x() + rect.width(), rect.y() + rect.height());
}
canvas->drawIRect(skrect, paint);
SkScalar track[3];
SkColorToHSV(track_color_, track);
paint.setColor(OutlineColor(track, thumb));
DrawBox(canvas, rect, paint);
if (rect.height() > 10 && rect.width() > 10) {
const int grippy_half_width = 2;
const int inter_grippy_offset = 3;
if (vertical) {
DrawHorizLine(canvas,
midx - grippy_half_width,
midx + grippy_half_width,
midy - inter_grippy_offset,
paint);
DrawHorizLine(canvas,
midx - grippy_half_width,
midx + grippy_half_width,
midy,
paint);
DrawHorizLine(canvas,
midx - grippy_half_width,
midx + grippy_half_width,
midy + inter_grippy_offset,
paint);
} else {
DrawVertLine(canvas,
midx - inter_grippy_offset,
midy - grippy_half_width,
midy + grippy_half_width,
paint);
DrawVertLine(canvas,
midx,
midy - grippy_half_width,
midy + grippy_half_width,
paint);
DrawVertLine(canvas,
midx + inter_grippy_offset,
midy - grippy_half_width,
midy + grippy_half_width,
paint);
}
}
}
void NativeThemeBase::PaintScrollbarCorner(SkCanvas* canvas,
State state,
const gfx::Rect& rect) const {
SkPaint paint;
paint.setColor(SK_ColorWHITE);
paint.setStyle(SkPaint::kFill_Style);
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
canvas->drawIRect(RectToSkIRect(rect), paint);
}
void NativeThemeBase::PaintCheckbox(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button) const {
SkRect skrect = PaintCheckboxRadioCommon(canvas, state, rect,
SkIntToScalar(2));
if (!skrect.isEmpty()) {
// Draw the checkmark / dash.
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
if (state == kDisabled)
paint.setColor(kCheckboxStrokeDisabledColor);
else
paint.setColor(kCheckboxStrokeColor);
if (button.indeterminate) {
SkPath dash;
dash.moveTo(skrect.x() + skrect.width() * 0.16,
(skrect.y() + skrect.bottom()) / 2);
dash.rLineTo(skrect.width() * 0.68, 0);
paint.setStrokeWidth(SkFloatToScalar(skrect.height() * 0.2));
canvas->drawPath(dash, paint);
} else if (button.checked) {
SkPath check;
check.moveTo(skrect.x() + skrect.width() * 0.2,
skrect.y() + skrect.height() * 0.5);
check.rLineTo(skrect.width() * 0.2, skrect.height() * 0.2);
paint.setStrokeWidth(SkFloatToScalar(skrect.height() * 0.23));
check.lineTo(skrect.right() - skrect.width() * 0.2,
skrect.y() + skrect.height() * 0.2);
canvas->drawPath(check, paint);
}
}
}
// Draws the common elements of checkboxes and radio buttons.
// Returns the rectangle within which any additional decorations should be
// drawn, or empty if none.
SkRect NativeThemeBase::PaintCheckboxRadioCommon(
SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const SkScalar borderRadius) const {
SkRect skrect = gfx::RectToSkRect(rect);
// Use the largest square that fits inside the provided rectangle.
// No other browser seems to support non-square widget, so accidentally
// having non-square sizes is common (eg. amazon and webkit dev tools).
if (skrect.width() != skrect.height()) {
SkScalar size = SkMinScalar(skrect.width(), skrect.height());
skrect.inset((skrect.width() - size) / 2, (skrect.height() - size) / 2);
}
// If the rectangle is too small then paint only a rectangle. We don't want
// to have to worry about '- 1' and '+ 1' calculations below having overflow
// or underflow.
if (skrect.width() <= 2) {
SkPaint paint;
paint.setColor(kCheckboxTinyColor);
paint.setStyle(SkPaint::kFill_Style);
canvas->drawRect(skrect, paint);
// Too small to draw anything more.
return SkRect::MakeEmpty();
}
// Make room for the drop shadow.
skrect.iset(skrect.x(), skrect.y(), skrect.right() - 1, skrect.bottom() - 1);
// Draw the drop shadow below the widget.
if (state != kPressed) {
SkPaint paint;
paint.setAntiAlias(true);
SkRect shadowRect = skrect;
shadowRect.offset(0, 1);
if (state == kDisabled)
paint.setColor(kCheckboxShadowDisabledColor);
else if (state == kHovered)
paint.setColor(kCheckboxShadowHoveredColor);
else
paint.setColor(kCheckboxShadowColor);
paint.setStyle(SkPaint::kFill_Style);
canvas->drawRoundRect(shadowRect, borderRadius, borderRadius, paint);
}
// Draw the gradient-filled rectangle
SkPoint gradient_bounds[3];
gradient_bounds[0].set(skrect.x(), skrect.y());
gradient_bounds[1].set(skrect.x(), skrect.y() + skrect.height() * 0.38);
gradient_bounds[2].set(skrect.x(), skrect.bottom());
const SkColor* startEndColors;
if (state == kPressed)
startEndColors = kCheckboxGradientPressedColors;
else if (state == kHovered)
startEndColors = kCheckboxGradientHoveredColors;
else if (state == kDisabled)
startEndColors = kCheckboxGradientDisabledColors;
else /* kNormal */
startEndColors = kCheckboxGradientColors;
SkColor colors[3] = {startEndColors[0], startEndColors[0], startEndColors[1]};
skia::RefPtr<SkShader> shader = skia::AdoptRef(
SkGradientShader::CreateLinear(
gradient_bounds, colors, NULL, 3, SkShader::kClamp_TileMode));
SkPaint paint;
paint.setAntiAlias(true);
paint.setShader(shader.get());
paint.setStyle(SkPaint::kFill_Style);
canvas->drawRoundRect(skrect, borderRadius, borderRadius, paint);
paint.setShader(NULL);
// Draw the border.
if (state == kHovered)
paint.setColor(kCheckboxBorderHoveredColor);
else if (state == kDisabled)
paint.setColor(kCheckboxBorderDisabledColor);
else
paint.setColor(kCheckboxBorderColor);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(1));
skrect.inset(SkFloatToScalar(.5f), SkFloatToScalar(.5f));
canvas->drawRoundRect(skrect, borderRadius, borderRadius, paint);
// Return the rectangle excluding the drop shadow for drawing any additional
// decorations.
return skrect;
}
void NativeThemeBase::PaintRadio(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button) const {
// Most of a radio button is the same as a checkbox, except the the rounded
// square is a circle (i.e. border radius >= 100%).
const SkScalar radius = SkFloatToScalar(
static_cast<float>(std::max(rect.width(), rect.height())) / 2);
SkRect skrect = PaintCheckboxRadioCommon(canvas, state, rect, radius);
if (!skrect.isEmpty() && button.checked) {
// Draw the dot.
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kFill_Style);
if (state == kDisabled)
paint.setColor(kRadioDotDisabledColor);
else
paint.setColor(kRadioDotColor);
skrect.inset(skrect.width() * 0.25, skrect.height() * 0.25);
// Use drawRoundedRect instead of drawOval to be completely consistent
// with the border in PaintCheckboxRadioNewCommon.
canvas->drawRoundRect(skrect, radius, radius, paint);
}
}
void NativeThemeBase::PaintButton(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const ButtonExtraParams& button) const {
SkPaint paint;
const int kRight = rect.right();
const int kBottom = rect.bottom();
SkRect skrect = SkRect::MakeLTRB(rect.x(), rect.y(), kRight, kBottom);
SkColor base_color = button.background_color;
color_utils::HSL base_hsl;
color_utils::SkColorToHSL(base_color, &base_hsl);
// Our standard gradient is from 0xdd to 0xf8. This is the amount of
// increased luminance between those values.
SkColor light_color(BrightenColor(base_hsl, SkColorGetA(base_color), 0.105));
// If the button is too small, fallback to drawing a single, solid color
if (rect.width() < 5 || rect.height() < 5) {
paint.setColor(base_color);
canvas->drawRect(skrect, paint);
return;
}
paint.setColor(SK_ColorBLACK);
const int kLightEnd = state == kPressed ? 1 : 0;
const int kDarkEnd = !kLightEnd;
SkPoint gradient_bounds[2];
gradient_bounds[kLightEnd].iset(rect.x(), rect.y());
gradient_bounds[kDarkEnd].iset(rect.x(), kBottom - 1);
SkColor colors[2];
colors[0] = light_color;
colors[1] = base_color;
skia::RefPtr<SkShader> shader = skia::AdoptRef(
SkGradientShader::CreateLinear(
gradient_bounds, colors, NULL, 2, SkShader::kClamp_TileMode));
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
paint.setShader(shader.get());
canvas->drawRoundRect(skrect, SkIntToScalar(1), SkIntToScalar(1), paint);
paint.setShader(NULL);
if (button.has_border) {
int border_alpha = state == kHovered ? 0x80 : 0x55;
if (button.is_focused) {
border_alpha = 0xff;
paint.setColor(GetSystemColor(kColorId_FocusedBorderColor));
}
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(1));
paint.setAlpha(border_alpha);
skrect.inset(SkFloatToScalar(.5f), SkFloatToScalar(.5f));
canvas->drawRoundRect(skrect, SkIntToScalar(1), SkIntToScalar(1), paint);
}
}
void NativeThemeBase::PaintTextField(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const TextFieldExtraParams& text) const {
SkRect bounds;
bounds.set(rect.x(), rect.y(), rect.right() - 1, rect.bottom() - 1);
SkPaint fill_paint;
fill_paint.setStyle(SkPaint::kFill_Style);
fill_paint.setColor(text.background_color);
canvas->drawRect(bounds, fill_paint);
// Text INPUT, listbox SELECT, and TEXTAREA have consistent borders.
// border: 1px solid #a9a9a9
SkPaint stroke_paint;
stroke_paint.setStyle(SkPaint::kStroke_Style);
stroke_paint.setColor(kTextBorderColor);
canvas->drawRect(bounds, stroke_paint);
}
void NativeThemeBase::PaintMenuList(
SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const MenuListExtraParams& menu_list) const {
// If a border radius is specified, we let the WebCore paint the background
// and the border of the control.
if (!menu_list.has_border_radius) {
ButtonExtraParams button = { 0 };
button.background_color = menu_list.background_color;
button.has_border = menu_list.has_border;
PaintButton(canvas, state, rect, button);
}
SkPaint paint;
paint.setColor(SK_ColorBLACK);
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kFill_Style);
SkPath path;
path.moveTo(menu_list.arrow_x, menu_list.arrow_y - 3);
path.rLineTo(6, 0);
path.rLineTo(-3, 6);
path.close();
canvas->drawPath(path, paint);
}
void NativeThemeBase::PaintMenuPopupBackground(
SkCanvas* canvas,
const gfx::Size& size,
const MenuBackgroundExtraParams& menu_background) const {
canvas->drawColor(kMenuPopupBackgroundColor, SkXfermode::kSrc_Mode);
}
void NativeThemeBase::PaintMenuItemBackground(
SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const MenuListExtraParams& menu_list) const {
// By default don't draw anything over the normal background.
}
void NativeThemeBase::PaintSliderTrack(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const SliderExtraParams& slider) const {
const int kMidX = rect.x() + rect.width() / 2;
const int kMidY = rect.y() + rect.height() / 2;
SkPaint paint;
paint.setColor(kSliderTrackBackgroundColor);
SkRect skrect;
if (slider.vertical) {
skrect.set(std::max(rect.x(), kMidX - 2),
rect.y(),
std::min(rect.right(), kMidX + 2),
rect.bottom());
} else {
skrect.set(rect.x(),
std::max(rect.y(), kMidY - 2),
rect.right(),
std::min(rect.bottom(), kMidY + 2));
}
canvas->drawRect(skrect, paint);
}
void NativeThemeBase::PaintSliderThumb(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const SliderExtraParams& slider) const {
const bool hovered = (state == kHovered) || slider.in_drag;
const int kMidX = rect.x() + rect.width() / 2;
const int kMidY = rect.y() + rect.height() / 2;
SkPaint paint;
paint.setColor(hovered ? SK_ColorWHITE : kSliderThumbLightGrey);
SkIRect skrect;
if (slider.vertical)
skrect.set(rect.x(), rect.y(), kMidX + 1, rect.bottom());
else
skrect.set(rect.x(), rect.y(), rect.right(), kMidY + 1);
canvas->drawIRect(skrect, paint);
paint.setColor(hovered ? kSliderThumbLightGrey : kSliderThumbDarkGrey);
if (slider.vertical)
skrect.set(kMidX + 1, rect.y(), rect.right(), rect.bottom());
else
skrect.set(rect.x(), kMidY + 1, rect.right(), rect.bottom());
canvas->drawIRect(skrect, paint);
paint.setColor(kSliderThumbBorderDarkGrey);
DrawBox(canvas, rect, paint);
if (rect.height() > 10 && rect.width() > 10) {
DrawHorizLine(canvas, kMidX - 2, kMidX + 2, kMidY, paint);
DrawHorizLine(canvas, kMidX - 2, kMidX + 2, kMidY - 3, paint);
DrawHorizLine(canvas, kMidX - 2, kMidX + 2, kMidY + 3, paint);
}
}
void NativeThemeBase::PaintInnerSpinButton(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const InnerSpinButtonExtraParams& spin_button) const {
if (spin_button.read_only)
state = kDisabled;
State north_state = state;
State south_state = state;
if (spin_button.spin_up)
south_state = south_state != kDisabled ? kNormal : kDisabled;
else
north_state = north_state != kDisabled ? kNormal : kDisabled;
gfx::Rect half = rect;
half.set_height(rect.height() / 2);
PaintArrowButton(canvas, half, kScrollbarUpArrow, north_state);
half.set_y(rect.y() + rect.height() / 2);
PaintArrowButton(canvas, half, kScrollbarDownArrow, south_state);
}
void NativeThemeBase::PaintProgressBar(SkCanvas* canvas,
State state,
const gfx::Rect& rect,
const ProgressBarExtraParams& progress_bar) const {
ResourceBundle& rb = ResourceBundle::GetSharedInstance();
gfx::ImageSkia* bar_image = rb.GetImageSkiaNamed(IDR_PROGRESS_BAR);
gfx::ImageSkia* left_border_image = rb.GetImageSkiaNamed(
IDR_PROGRESS_BORDER_LEFT);
gfx::ImageSkia* right_border_image = rb.GetImageSkiaNamed(
IDR_PROGRESS_BORDER_RIGHT);
DCHECK(bar_image->width() > 0);
DCHECK(rect.width() > 0);
float tile_scale_y = static_cast<float>(rect.height()) / bar_image->height();
int dest_left_border_width = left_border_image->width();
int dest_right_border_width = right_border_image->width();
// Since an implicit float -> int conversion will truncate, we want to make
// sure that if a border is desired, it gets at least one pixel.
if (dest_left_border_width > 0) {
dest_left_border_width = dest_left_border_width * tile_scale_y;
dest_left_border_width = std::max(dest_left_border_width, 1);
}
if (dest_right_border_width > 0) {
dest_right_border_width = dest_right_border_width * tile_scale_y;
dest_right_border_width = std::max(dest_right_border_width, 1);
}
// Since the width of the progress bar may not be evenly divisible by the
// tile size, in order to make it look right we may need to draw some of the
// with a width of 1 pixel smaller than the rest of the tiles.
int new_tile_width = static_cast<int>(bar_image->width() * tile_scale_y);
new_tile_width = std::max(new_tile_width, 1);
float tile_scale_x = static_cast<float>(new_tile_width) / bar_image->width();
if (rect.width() % new_tile_width == 0) {
DrawTiledImage(canvas, *bar_image, 0, 0, tile_scale_x, tile_scale_y,
rect.x(), rect.y(),
rect.width(), rect.height());
} else {
int num_tiles = 1 + rect.width() / new_tile_width;
int overshoot = num_tiles * new_tile_width - rect.width();
// Since |overshoot| represents the number of tiles that were too big, draw
// |overshoot| tiles with their width reduced by 1.
int num_big_tiles = num_tiles - overshoot;
int num_small_tiles = overshoot;
int small_width = new_tile_width - 1;
float small_scale_x = static_cast<float>(small_width) / bar_image->width();
float big_scale_x = tile_scale_x;
gfx::Rect big_rect = rect;
gfx::Rect small_rect = rect;
big_rect.Inset(0, 0, num_small_tiles*small_width, 0);
small_rect.Inset(num_big_tiles*new_tile_width, 0, 0, 0);
DrawTiledImage(canvas, *bar_image, 0, 0, big_scale_x, tile_scale_y,
big_rect.x(), big_rect.y(), big_rect.width(), big_rect.height());
DrawTiledImage(canvas, *bar_image, 0, 0, small_scale_x, tile_scale_y,
small_rect.x(), small_rect.y(), small_rect.width(), small_rect.height());
}
if (progress_bar.value_rect_width) {
gfx::ImageSkia* value_image = rb.GetImageSkiaNamed(IDR_PROGRESS_VALUE);
new_tile_width = static_cast<int>(value_image->width() * tile_scale_y);
tile_scale_x = static_cast<float>(new_tile_width) /
value_image->width();
DrawTiledImage(canvas, *value_image, 0, 0, tile_scale_x, tile_scale_y,
progress_bar.value_rect_x,
progress_bar.value_rect_y,
progress_bar.value_rect_width,
progress_bar.value_rect_height);
}
DrawImageInt(canvas, *left_border_image, 0, 0, left_border_image->width(),
left_border_image->height(), rect.x(), rect.y(), dest_left_border_width,
rect.height());
int dest_x = rect.right() - dest_right_border_width;
DrawImageInt(canvas, *right_border_image, 0, 0, right_border_image->width(),
right_border_image->height(), dest_x, rect.y(),
dest_right_border_width, rect.height());
}
bool NativeThemeBase::IntersectsClipRectInt(SkCanvas* canvas,
int x, int y, int w, int h) const {
SkRect clip;
return canvas->getClipBounds(&clip) &&
clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w),
SkIntToScalar(y + h));
}
void NativeThemeBase::DrawImageInt(
SkCanvas* sk_canvas, const gfx::ImageSkia& image,
int src_x, int src_y, int src_w, int src_h,
int dest_x, int dest_y, int dest_w, int dest_h) const {
scoped_ptr<gfx::Canvas> canvas(CommonThemeCreateCanvas(sk_canvas));
canvas->DrawImageInt(image, src_x, src_y, src_w, src_h,
dest_x, dest_y, dest_w, dest_h, true);
}
void NativeThemeBase::DrawTiledImage(SkCanvas* sk_canvas,
const gfx::ImageSkia& image,
int src_x, int src_y, float tile_scale_x, float tile_scale_y,
int dest_x, int dest_y, int w, int h) const {
scoped_ptr<gfx::Canvas> canvas(CommonThemeCreateCanvas(sk_canvas));
canvas->TileImageInt(image, src_x, src_y, tile_scale_x,
tile_scale_y, dest_x, dest_y, w, h);
}
SkColor NativeThemeBase::SaturateAndBrighten(SkScalar* hsv,
SkScalar saturate_amount,
SkScalar brighten_amount) const {
SkScalar color[3];
color[0] = hsv[0];
color[1] = Clamp(hsv[1] + saturate_amount, 0.0, 1.0);
color[2] = Clamp(hsv[2] + brighten_amount, 0.0, 1.0);
return SkHSVToColor(color);
}
SkColor NativeThemeBase::GetArrowColor(State state) const {
if (state != kDisabled)
return SK_ColorBLACK;
SkScalar track_hsv[3];
SkColorToHSV(track_color_, track_hsv);
SkScalar thumb_hsv[3];
SkColorToHSV(thumb_inactive_color_, thumb_hsv);
return OutlineColor(track_hsv, thumb_hsv);
}
void NativeThemeBase::DrawVertLine(SkCanvas* canvas,
int x,
int y1,
int y2,
const SkPaint& paint) const {
SkIRect skrect;
skrect.set(x, y1, x + 1, y2 + 1);
canvas->drawIRect(skrect, paint);
}
void NativeThemeBase::DrawHorizLine(SkCanvas* canvas,
int x1,
int x2,
int y,
const SkPaint& paint) const {
SkIRect skrect;
skrect.set(x1, y, x2 + 1, y + 1);
canvas->drawIRect(skrect, paint);
}
void NativeThemeBase::DrawBox(SkCanvas* canvas,
const gfx::Rect& rect,
const SkPaint& paint) const {
const int right = rect.x() + rect.width() - 1;
const int bottom = rect.y() + rect.height() - 1;
DrawHorizLine(canvas, rect.x(), right, rect.y(), paint);
DrawVertLine(canvas, right, rect.y(), bottom, paint);
DrawHorizLine(canvas, rect.x(), right, bottom, paint);
DrawVertLine(canvas, rect.x(), rect.y(), bottom, paint);
}
SkScalar NativeThemeBase::Clamp(SkScalar value,
SkScalar min,
SkScalar max) const {
return std::min(std::max(value, min), max);
}
SkColor NativeThemeBase::OutlineColor(SkScalar* hsv1, SkScalar* hsv2) const {
// GTK Theme engines have way too much control over the layout of
// the scrollbar. We might be able to more closely approximate its
// look-and-feel, if we sent whole images instead of just colors
// from the browser to the renderer. But even then, some themes
// would just break.
//
// So, instead, we don't even try to 100% replicate the look of
// the native scrollbar. We render our own version, but we make
// sure to pick colors that blend in nicely with the system GTK
// theme. In most cases, we can just sample a couple of pixels
// from the system scrollbar and use those colors to draw our
// scrollbar.
//
// This works fine for the track color and the overall thumb
// color. But it fails spectacularly for the outline color used
// around the thumb piece. Not all themes have a clearly defined
// outline. For some of them it is partially transparent, and for
// others the thickness is very unpredictable.
//
// So, instead of trying to approximate the system theme, we
// instead try to compute a reasonable looking choice based on the
// known color of the track and the thumb piece. This is difficult
// when trying to deal both with high- and low-contrast themes,
// and both with positive and inverted themes.
//
// The following code has been tested to look OK with all of the
// default GTK themes.
SkScalar min_diff = Clamp((hsv1[1] + hsv2[1]) * 1.2f, 0.28f, 0.5f);
SkScalar diff = Clamp(fabs(hsv1[2] - hsv2[2]) / 2, min_diff, 0.5f);
if (hsv1[2] + hsv2[2] > 1.0)
diff = -diff;
return SaturateAndBrighten(hsv2, -0.2f, diff);
}
} // namespace ui