blob: d490a957dfda64f026a9768b7e46e47e4f4cc54d [file] [log] [blame]
/*
* Copyright (C) 2007 Apple Inc.
* Copyright (C) 2007 Alp Toker <alp@atoker.com>
* Copyright (C) 2008 Collabora Ltd.
* Copyright (C) 2008, 2009 Google Inc.
* Copyright (C) 2009 Kenneth Rohde Christiansen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "third_party/blink/renderer/core/paint/theme_painter_default.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/web_theme_engine.h"
#include "third_party/blink/public/resources/grit/blink_image_resources.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/html/forms/html_input_element.h"
#include "third_party/blink/renderer/core/html/forms/spin_button_element.h"
#include "third_party/blink/renderer/core/html/shadow/shadow_element_names.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/core/layout/layout_progress.h"
#include "third_party/blink/renderer/core/layout/layout_theme_default.h"
#include "third_party/blink/renderer/core/paint/paint_info.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context_state_saver.h"
#include "ui/base/ui_base_features.h"
#include "ui/gfx/color_utils.h"
#include "ui/native_theme/native_theme.h"
namespace blink {
namespace {
const unsigned kDefaultButtonBackgroundColor = 0xffdddddd;
bool IsIndeterminate(const Element& element) {
if (const auto* input = DynamicTo<HTMLInputElement>(element))
return input->ShouldAppearIndeterminate();
return false;
}
bool IsChecked(const Element& element) {
if (const auto* input = DynamicTo<HTMLInputElement>(element))
return input->ShouldAppearChecked();
return false;
}
WebThemeEngine::State GetWebThemeState(const Element& element) {
if (element.IsDisabledFormControl())
return WebThemeEngine::kStateDisabled;
if (element.IsActive())
return WebThemeEngine::kStatePressed;
if (element.IsHovered())
return WebThemeEngine::kStateHover;
return WebThemeEngine::kStateNormal;
}
class DirectionFlippingScope {
STACK_ALLOCATED();
public:
DirectionFlippingScope(const LayoutObject&, const PaintInfo&, const IntRect&);
~DirectionFlippingScope();
private:
bool needs_flipping_;
const PaintInfo& paint_info_;
};
DirectionFlippingScope::DirectionFlippingScope(
const LayoutObject& layout_object,
const PaintInfo& paint_info,
const IntRect& rect)
: needs_flipping_(!layout_object.StyleRef().IsLeftToRightDirection()),
paint_info_(paint_info) {
if (!needs_flipping_)
return;
paint_info_.context.Save();
paint_info_.context.Translate(2 * rect.X() + rect.Width(), 0);
paint_info_.context.Scale(-1, 1);
}
DirectionFlippingScope::~DirectionFlippingScope() {
if (!needs_flipping_)
return;
paint_info_.context.Restore();
}
IntRect DeterminateProgressValueRectFor(const LayoutProgress& layout_progress,
const IntRect& rect) {
int dx = rect.Width() * layout_progress.GetPosition();
return IntRect(rect.X(), rect.Y(), dx, rect.Height());
}
IntRect IndeterminateProgressValueRectFor(const LayoutProgress& layout_progress,
const IntRect& rect) {
// Value comes from default of GTK+.
static const int kProgressActivityBlocks = 5;
int value_width = rect.Width() / kProgressActivityBlocks;
int movable_width = rect.Width() - value_width;
if (movable_width <= 0)
return IntRect();
double progress = layout_progress.AnimationProgress();
if (progress < 0.5)
return IntRect(rect.X() + progress * 2 * movable_width, rect.Y(),
value_width, rect.Height());
return IntRect(rect.X() + (1.0 - progress) * 2 * movable_width, rect.Y(),
value_width, rect.Height());
}
IntRect ProgressValueRectFor(const LayoutProgress& layout_progress,
const IntRect& rect) {
return layout_progress.IsDeterminate()
? DeterminateProgressValueRectFor(layout_progress, rect)
: IndeterminateProgressValueRectFor(layout_progress, rect);
}
IntRect ConvertToPaintingRect(const LayoutObject& input_layout_object,
const LayoutObject& part_layout_object,
PhysicalRect part_rect,
const IntRect& local_offset) {
// Compute an offset between the partLayoutObject and the inputLayoutObject.
PhysicalOffset offset_from_input_layout_object =
-part_layout_object.OffsetFromAncestor(&input_layout_object);
// Move the rect into partLayoutObject's coords.
part_rect.Move(offset_from_input_layout_object);
// Account for the local drawing offset.
part_rect.Move(PhysicalOffset(local_offset.Location()));
return PixelSnappedIntRect(part_rect);
}
} // namespace
ThemePainterDefault::ThemePainterDefault(LayoutThemeDefault& theme)
: ThemePainter(), theme_(theme) {}
bool ThemePainterDefault::PaintCheckbox(const Element& element,
const Document&,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
cc::PaintCanvas* canvas = paint_info.context.Canvas();
extra_params.button = WebThemeEngine::ButtonExtraParams();
extra_params.button.checked = IsChecked(element);
extra_params.button.indeterminate = IsIndeterminate(element);
float zoom_level = style.EffectiveZoom();
extra_params.button.zoom = zoom_level;
GraphicsContextStateSaver state_saver(paint_info.context, false);
IntRect unzoomed_rect =
ApplyZoomToRect(rect, paint_info, state_saver, zoom_level);
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartCheckbox, GetWebThemeState(element),
gfx::Rect(unzoomed_rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintRadio(const Element& element,
const Document&,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
cc::PaintCanvas* canvas = paint_info.context.Canvas();
extra_params.button = WebThemeEngine::ButtonExtraParams();
extra_params.button.checked = IsChecked(element);
float zoom_level = style.EffectiveZoom();
extra_params.button.zoom = zoom_level;
GraphicsContextStateSaver state_saver(paint_info.context, false);
IntRect unzoomed_rect =
features::IsFormControlsRefreshEnabled()
? ApplyZoomToRect(rect, paint_info, state_saver, zoom_level)
: rect;
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartRadio, GetWebThemeState(element),
gfx::Rect(unzoomed_rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintButton(const Element& element,
const Document&,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
cc::PaintCanvas* canvas = paint_info.context.Canvas();
extra_params.button = WebThemeEngine::ButtonExtraParams();
extra_params.button.has_border = true;
extra_params.button.background_color = kDefaultButtonBackgroundColor;
extra_params.button.zoom = style.EffectiveZoom();
if (style.HasBackground()) {
extra_params.button.background_color =
style.VisitedDependentColor(GetCSSPropertyBackgroundColor()).Rgb();
}
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartButton, GetWebThemeState(element),
gfx::Rect(rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintTextField(const Element& element,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
// WebThemeEngine does not handle border rounded corner and background image
// so return true to draw CSS border and background.
if (style.HasBorderRadius() || style.HasBackgroundImage())
return true;
// Don't use the theme painter if dark mode is enabled. It has a separate
// graphics pipeline that doesn't go through GraphicsContext and so does not
// currently know how to handle Dark Mode, causing elements to be rendered
// incorrectly (e.g. https://crbug.com/937872).
// TODO(gilmanmh): Implement a more permanent solution that allows use of
// native dark themes.
if (paint_info.context.IsDarkModeEnabled())
return true;
ControlPart part = style.EffectiveAppearance();
WebThemeEngine::ExtraParams extra_params;
extra_params.text_field.is_text_area = part == kTextAreaPart;
extra_params.text_field.is_listbox = part == kListboxPart;
extra_params.text_field.has_border = true;
extra_params.text_field.zoom = style.EffectiveZoom();
cc::PaintCanvas* canvas = paint_info.context.Canvas();
Color background_color =
style.VisitedDependentColor(GetCSSPropertyBackgroundColor());
extra_params.text_field.background_color = background_color.Rgb();
extra_params.text_field.auto_complete_active =
DynamicTo<HTMLFormControlElement>(element)->IsAutofilled();
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartTextField, GetWebThemeState(element),
gfx::Rect(rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintMenuList(const Element& element,
const Document& document,
const ComputedStyle& style,
const PaintInfo& i,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
// Match Chromium Win behaviour of showing all borders if any are shown.
extra_params.menu_list.has_border = style.HasBorder();
extra_params.menu_list.has_border_radius = style.HasBorderRadius();
extra_params.menu_list.zoom = style.EffectiveZoom();
// Fallback to transparent if the specified color object is invalid.
Color background_color(Color::kTransparent);
if (style.HasBackground()) {
background_color =
style.VisitedDependentColor(GetCSSPropertyBackgroundColor());
}
extra_params.menu_list.background_color = background_color.Rgb();
// If we have a background image, don't fill the content area to expose the
// parent's background. Also, we shouldn't fill the content area if the
// alpha of the color is 0. The API of Windows GDI ignores the alpha.
// FIXME: the normal Aura theme doesn't care about this, so we should
// investigate if we really need fillContentArea.
extra_params.menu_list.fill_content_area =
!style.HasBackgroundImage() && background_color.Alpha();
SetupMenuListArrow(document, style, rect, extra_params);
cc::PaintCanvas* canvas = i.context.Canvas();
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartMenuList, GetWebThemeState(element),
gfx::Rect(rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintMenuListButton(const Element& element,
const Document& document,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
extra_params.menu_list.has_border = false;
extra_params.menu_list.has_border_radius = style.HasBorderRadius();
extra_params.menu_list.background_color = Color::kTransparent;
extra_params.menu_list.fill_content_area = false;
SetupMenuListArrow(document, style, rect, extra_params);
cc::PaintCanvas* canvas = paint_info.context.Canvas();
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartMenuList, GetWebThemeState(element),
gfx::Rect(rect), &extra_params, style.UsedColorScheme());
return false;
}
void ThemePainterDefault::SetupMenuListArrow(
const Document& document,
const ComputedStyle& style,
const IntRect& rect,
WebThemeEngine::ExtraParams& extra_params) {
const int left = rect.X() + floorf(style.BorderLeftWidth());
const int right = rect.X() + rect.Width() - floorf(style.BorderRightWidth());
const int middle = rect.Y() + rect.Height() / 2;
extra_params.menu_list.arrow_y = middle;
float arrow_box_width =
theme_.ClampedMenuListArrowPaddingSize(document.GetFrame(), style);
float arrow_scale_factor = arrow_box_width / theme_.MenuListArrowWidthInDIP();
// TODO(tkent): This should be 7.0 to match scroll bar buttons.
float arrow_size = (features::IsFormControlsRefreshEnabled() ? 8.0 : 6.0) *
arrow_scale_factor;
// Put the arrow at the center of paddingForArrow area.
// |arrowX| is the left position for Aura theme engine.
extra_params.menu_list.arrow_x =
(style.Direction() == TextDirection::kRtl)
? left + (arrow_box_width - arrow_size) / 2
: right - (arrow_box_width + arrow_size) / 2;
extra_params.menu_list.arrow_size = arrow_size;
extra_params.menu_list.arrow_color =
style.VisitedDependentColor(GetCSSPropertyColor()).Rgb();
}
bool ThemePainterDefault::PaintSliderTrack(const Element& element,
const LayoutObject& o,
const PaintInfo& i,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
cc::PaintCanvas* canvas = i.context.Canvas();
extra_params.slider.vertical =
o.StyleRef().EffectiveAppearance() == kSliderVerticalPart;
extra_params.slider.in_drag = false;
PaintSliderTicks(o, i, rect);
float zoom_level = o.StyleRef().EffectiveZoom();
extra_params.slider.zoom = zoom_level;
GraphicsContextStateSaver state_saver(i.context, false);
IntRect unzoomed_rect = rect;
if (zoom_level != 1 && !features::IsFormControlsRefreshEnabled()) {
state_saver.Save();
unzoomed_rect.SetWidth(unzoomed_rect.Width() / zoom_level);
unzoomed_rect.SetHeight(unzoomed_rect.Height() / zoom_level);
i.context.Translate(unzoomed_rect.X(), unzoomed_rect.Y());
i.context.Scale(zoom_level, zoom_level);
i.context.Translate(-unzoomed_rect.X(), -unzoomed_rect.Y());
}
auto* input = DynamicTo<HTMLInputElement>(element);
extra_params.slider.thumb_x = 0;
extra_params.slider.thumb_y = 0;
extra_params.slider.right_to_left = !o.StyleRef().IsLeftToRightDirection();
if (input) {
Element* thumb_element = input->UserAgentShadowRoot()
? input->UserAgentShadowRoot()->getElementById(
shadow_element_names::kIdSliderThumb)
: nullptr;
LayoutBox* thumb = thumb_element ? thumb_element->GetLayoutBox() : nullptr;
LayoutBox* input_box = input->GetLayoutBox();
if (thumb) {
IntRect thumb_rect = PixelSnappedIntRect(thumb->FrameRect());
if (features::IsFormControlsRefreshEnabled()) {
extra_params.slider.thumb_x = thumb_rect.X() +
input_box->PaddingLeft().ToInt() +
input_box->BorderLeft().ToInt();
extra_params.slider.thumb_y = thumb_rect.Y() +
input_box->PaddingTop().ToInt() +
input_box->BorderTop().ToInt();
} else {
extra_params.slider.thumb_x =
(thumb_rect.X() + input_box->PaddingLeft().ToInt() +
input_box->BorderLeft().ToInt()) /
zoom_level;
extra_params.slider.thumb_y =
(thumb_rect.Y() + input_box->PaddingTop().ToInt() +
input_box->BorderTop().ToInt()) /
zoom_level;
}
}
}
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartSliderTrack, GetWebThemeState(element),
gfx::Rect(unzoomed_rect), &extra_params, o.StyleRef().UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintSliderThumb(const Element& element,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
cc::PaintCanvas* canvas = paint_info.context.Canvas();
extra_params.slider.vertical =
style.EffectiveAppearance() == kSliderThumbVerticalPart;
extra_params.slider.in_drag = element.IsActive();
float zoom_level = style.EffectiveZoom();
extra_params.slider.zoom = zoom_level;
GraphicsContextStateSaver state_saver(paint_info.context, false);
IntRect unzoomed_rect = rect;
if (zoom_level != 1 && !features::IsFormControlsRefreshEnabled()) {
state_saver.Save();
unzoomed_rect.SetWidth(unzoomed_rect.Width() / zoom_level);
unzoomed_rect.SetHeight(unzoomed_rect.Height() / zoom_level);
paint_info.context.Translate(unzoomed_rect.X(), unzoomed_rect.Y());
paint_info.context.Scale(zoom_level, zoom_level);
paint_info.context.Translate(-unzoomed_rect.X(), -unzoomed_rect.Y());
}
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartSliderThumb, GetWebThemeState(element),
gfx::Rect(unzoomed_rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintInnerSpinButton(const Element& element,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
WebThemeEngine::ExtraParams extra_params;
cc::PaintCanvas* canvas = paint_info.context.Canvas();
bool spin_up = false;
if (const auto* spin_buttom = DynamicTo<SpinButtonElement>(element)) {
if (spin_buttom->GetUpDownState() == SpinButtonElement::kUp)
spin_up = element.IsHovered() || element.IsActive();
}
bool read_only = false;
if (const auto* control = DynamicTo<HTMLFormControlElement>(element))
read_only = control->IsReadOnly();
extra_params.inner_spin.spin_up = spin_up;
extra_params.inner_spin.read_only = read_only;
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartInnerSpinButton, GetWebThemeState(element),
gfx::Rect(rect), &extra_params, style.UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintProgressBar(const Element& element,
const LayoutObject& o,
const PaintInfo& i,
const IntRect& rect) {
if (!o.IsProgress())
return true;
const auto& layout_progress = To<LayoutProgress>(o);
IntRect value_rect = ProgressValueRectFor(layout_progress, rect);
WebThemeEngine::ExtraParams extra_params;
extra_params.progress_bar.determinate = layout_progress.IsDeterminate();
extra_params.progress_bar.value_rect_x = value_rect.X();
extra_params.progress_bar.value_rect_y = value_rect.Y();
extra_params.progress_bar.value_rect_width = value_rect.Width();
extra_params.progress_bar.value_rect_height = value_rect.Height();
extra_params.progress_bar.zoom = o.StyleRef().EffectiveZoom();
DirectionFlippingScope scope(o, i, rect);
cc::PaintCanvas* canvas = i.context.Canvas();
Platform::Current()->ThemeEngine()->Paint(
canvas, WebThemeEngine::kPartProgressBar, GetWebThemeState(element),
gfx::Rect(rect), &extra_params, o.StyleRef().UsedColorScheme());
return false;
}
bool ThemePainterDefault::PaintTextArea(const Element& element,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
return PaintTextField(element, style, paint_info, rect);
}
bool ThemePainterDefault::PaintSearchField(const Element& element,
const ComputedStyle& style,
const PaintInfo& paint_info,
const IntRect& rect) {
return PaintTextField(element, style, paint_info, rect);
}
bool ThemePainterDefault::PaintSearchFieldCancelButton(
const LayoutObject& cancel_button_object,
const PaintInfo& paint_info,
const IntRect& r) {
// Get the layoutObject of <input> element.
Node* input = cancel_button_object.GetNode()->OwnerShadowHost();
const LayoutObject& base_layout_object = input && input->GetLayoutObject()
? *input->GetLayoutObject()
: cancel_button_object;
if (!base_layout_object.IsBox())
return false;
const auto& input_layout_box = To<LayoutBox>(base_layout_object);
PhysicalRect input_content_box = input_layout_box.PhysicalContentBoxRect();
// Make sure the scaled button stays square and will fit in its parent's box.
LayoutUnit cancel_button_size =
std::min(input_content_box.size.width,
std::min(input_content_box.size.height, LayoutUnit(r.Height())));
// Calculate cancel button's coordinates relative to the input element.
// Center the button vertically. Round up though, so if it has to be one
// pixel off-center, it will be one pixel closer to the bottom of the field.
// This tends to look better with the text.
PhysicalRect cancel_button_rect(
cancel_button_object.OffsetFromAncestor(&input_layout_box).left,
input_content_box.Y() +
(input_content_box.Height() - cancel_button_size + 1) / 2,
cancel_button_size, cancel_button_size);
IntRect painting_rect = ConvertToPaintingRect(
input_layout_box, cancel_button_object, cancel_button_rect, r);
mojom::blink::ColorScheme color_scheme =
cancel_button_object.StyleRef().UsedColorScheme();
DEFINE_STATIC_REF(Image, cancel_image,
(Image::LoadPlatformResource(IDR_SEARCH_CANCEL)));
DEFINE_STATIC_REF(Image, cancel_pressed_image,
(Image::LoadPlatformResource(IDR_SEARCH_CANCEL_PRESSED)));
DEFINE_STATIC_REF(Image, cancel_image_dark_mode,
(Image::LoadPlatformResource(IDR_SEARCH_CANCEL_DARK_MODE)));
DEFINE_STATIC_REF(
Image, cancel_pressed_image_dark_mode,
(Image::LoadPlatformResource(IDR_SEARCH_CANCEL_PRESSED_DARK_MODE)));
DEFINE_STATIC_REF(
Image, cancel_image_hc_light_mode,
(Image::LoadPlatformResource(IDR_SEARCH_CANCEL_HC_LIGHT_MODE)));
DEFINE_STATIC_REF(
Image, cancel_pressed_image_hc_light_mode,
(Image::LoadPlatformResource(IDR_SEARCH_CANCEL_PRESSED_HC_LIGHT_MODE)));
Image* color_scheme_adjusted_cancel_image;
Image* color_scheme_adjusted_cancel_pressed_image;
if (ui::NativeTheme::GetInstanceForWeb()->UserHasContrastPreference()) {
// TODO(crbug.com/1159597): Ideally we want the cancel button to be the same
// color as search field text. Since the cancel button is currently painted
// with a .png, it can't be colored dynamically so currently our only
// choices are black and white.
Color search_field_text_color =
cancel_button_object.StyleRef().VisitedDependentColor(
GetCSSPropertyColor());
bool text_is_dark = color_utils::GetRelativeLuminance(
SkColor(search_field_text_color)) < 0.5;
color_scheme_adjusted_cancel_image =
text_is_dark ? cancel_image_hc_light_mode : cancel_image_dark_mode;
color_scheme_adjusted_cancel_pressed_image =
color_scheme_adjusted_cancel_image =
text_is_dark ? cancel_pressed_image_hc_light_mode
: cancel_pressed_image_dark_mode;
} else {
color_scheme_adjusted_cancel_image =
color_scheme == mojom::blink::ColorScheme::kLight
? cancel_image
: cancel_image_dark_mode;
color_scheme_adjusted_cancel_pressed_image =
color_scheme == mojom::blink::ColorScheme::kLight
? cancel_pressed_image
: cancel_pressed_image_dark_mode;
}
paint_info.context.DrawImage(
To<Element>(cancel_button_object.GetNode())->IsActive()
? color_scheme_adjusted_cancel_pressed_image
: color_scheme_adjusted_cancel_image,
Image::kSyncDecode, FloatRect(painting_rect));
return false;
}
IntRect ThemePainterDefault::ApplyZoomToRect(
const IntRect& rect,
const PaintInfo& paint_info,
GraphicsContextStateSaver& state_saver,
float zoom_level) {
IntRect unzoomed_rect = rect;
if (zoom_level != 1) {
state_saver.Save();
unzoomed_rect.SetWidth(unzoomed_rect.Width() / zoom_level);
unzoomed_rect.SetHeight(unzoomed_rect.Height() / zoom_level);
paint_info.context.Translate(unzoomed_rect.X(), unzoomed_rect.Y());
paint_info.context.Scale(zoom_level, zoom_level);
paint_info.context.Translate(-unzoomed_rect.X(), -unzoomed_rect.Y());
}
return unzoomed_rect;
}
} // namespace blink