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// 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/views/window/frame_background.h"
#include <algorithm>
#include "build/build_config.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/canvas.h"
#include "ui/native_theme/native_theme.h"
#include "ui/views/buildflags.h"
#include "ui/views/view.h"
namespace views {
FrameBackground::FrameBackground() = default;
FrameBackground::~FrameBackground() = default;
void FrameBackground::SetSideImages(const gfx::ImageSkia* left,
const gfx::ImageSkia* top,
const gfx::ImageSkia* right,
const gfx::ImageSkia* bottom) {
left_edge_ = left;
top_edge_ = top;
right_edge_ = right;
bottom_edge_ = bottom;
}
void FrameBackground::SetCornerImages(const gfx::ImageSkia* top_left,
const gfx::ImageSkia* top_right,
const gfx::ImageSkia* bottom_left,
const gfx::ImageSkia* bottom_right) {
top_left_corner_ = top_left;
top_right_corner_ = top_right;
bottom_left_corner_ = bottom_left;
bottom_right_corner_ = bottom_right;
}
void FrameBackground::PaintRestored(gfx::Canvas* canvas,
const View* view) const {
// Restored window painting is a superset of maximized window painting; let
// the maximized code paint the frame color and images.
PaintMaximized(canvas, view);
// Fill the frame borders with the frame color before drawing the edge images.
FillFrameBorders(canvas, view);
// Draw the top corners and edge, scaling the corner images down if they
// are too big and relative to the vertical space available.
int top_left_height =
std::min(top_left_corner_->height(),
view->height() - bottom_left_corner_->height());
canvas->DrawImageInt(*top_left_corner_, 0, 0, top_left_corner_->width(),
top_left_height, 0, 0, top_left_corner_->width(),
top_left_height, false);
canvas->TileImageInt(
*top_edge_, top_left_corner_->width(), 0,
view->width() - top_left_corner_->width() - top_right_corner_->width(),
top_edge_->height());
int top_right_height =
std::min(top_right_corner_->height(),
view->height() - bottom_right_corner_->height());
canvas->DrawImageInt(*top_right_corner_, 0, 0, top_right_corner_->width(),
top_right_height,
view->width() - top_right_corner_->width(), 0,
top_right_corner_->width(), top_right_height, false);
// Right edge.
int right_edge_height =
view->height() - top_right_height - bottom_right_corner_->height();
canvas->TileImageInt(*right_edge_, view->width() - right_edge_->width(),
top_right_height, right_edge_->width(),
right_edge_height);
// Bottom corners and edge.
canvas->DrawImageInt(*bottom_right_corner_,
view->width() - bottom_right_corner_->width(),
view->height() - bottom_right_corner_->height());
canvas->TileImageInt(*bottom_edge_, bottom_left_corner_->width(),
view->height() - bottom_edge_->height(),
view->width() - bottom_left_corner_->width() -
bottom_right_corner_->width(),
bottom_edge_->height());
canvas->DrawImageInt(*bottom_left_corner_, 0,
view->height() - bottom_left_corner_->height());
// Left edge.
int left_edge_height =
view->height() - top_left_height - bottom_left_corner_->height();
canvas->TileImageInt(*left_edge_, 0, top_left_height, left_edge_->width(),
left_edge_height);
}
void FrameBackground::PaintMaximized(gfx::Canvas* canvas,
const View* view) const {
// Fill the top with the frame color first so we have a constant background
// for areas not covered by the theme image.
#if defined(OS_LINUX) && BUILDFLAG(ENABLE_DESKTOP_AURA)
auto* native_theme = view->GetNativeTheme();
ui::NativeTheme::ExtraParams params;
params.frame_top_area.use_custom_frame = use_custom_frame_;
params.frame_top_area.is_active = is_active_;
params.frame_top_area.incognito = incognito_;
params.frame_top_area.default_background_color = frame_color_;
native_theme->Paint(canvas->sk_canvas(), ui::NativeTheme::kFrameTopArea,
ui::NativeTheme::kNormal,
gfx::Rect(0, 0, view->width(), top_area_height_), params);
#else
canvas->FillRect(gfx::Rect(0, 0, view->width(), top_area_height_),
frame_color_);
#endif
// Draw the theme frame and overlay, if available.
if (!theme_image_.isNull()) {
canvas->TileImageInt(theme_image_, 0, theme_image_y_inset_, 0, 0,
view->width(), top_area_height_, 1.0f,
SkTileMode::kRepeat, SkTileMode::kMirror);
}
if (!theme_overlay_image_.isNull())
canvas->DrawImageInt(theme_overlay_image_, 0, -maximized_top_inset_);
}
void FrameBackground::FillFrameBorders(gfx::Canvas* canvas,
const View* view) const {
// If the window is very short, we don't need to fill any borders.
int remaining_height = view->height() - top_area_height_;
if (remaining_height <= 0)
return;
// Fill down the sides.
canvas->FillRect(
gfx::Rect(0, top_area_height_, left_edge_->width(), remaining_height),
frame_color_);
canvas->FillRect(
gfx::Rect(view->width() - right_edge_->width(), top_area_height_,
right_edge_->width(), remaining_height),
frame_color_);
// If the window is very narrow, we're done.
int center_width = view->width() - left_edge_->width() - right_edge_->width();
if (center_width <= 0)
return;
// Fill the bottom area.
canvas->FillRect(
gfx::Rect(left_edge_->width(), view->height() - bottom_edge_->height(),
center_width, bottom_edge_->height()),
frame_color_);
}
} // namespace views
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