chrome/browser/ui/views/toolbar/toolbar_ink_drop_util.cc

// Copyright 2018 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 "chrome/browser/ui/views/toolbar/toolbar_ink_drop_util.h"

#include "base/bind.h"
#include "chrome/browser/themes/theme_properties.h"
#include "chrome/browser/ui/layout_constants.h"
#include "chrome/browser/ui/views/chrome_layout_provider.h"
#include "third_party/skia/include/core/SkPath.h"
#include "ui/base/theme_provider.h"
#include "ui/gfx/color_palette.h"
#include "ui/gfx/color_utils.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/skia_conversions.h"
#include "ui/views/animation/ink_drop.h"
#include "ui/views/animation/ink_drop_host_view.h"
#include "ui/views/animation/ink_drop_impl.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/controls/highlight_path_generator.h"
#include "ui/views/style/platform_style.h"
#include "ui/views/view.h"
#include "ui/views/view_class_properties.h"

namespace {
class ToolbarButtonHighlightPathGenerator
    : public views::HighlightPathGenerator {
 public:
  // HighlightPathGenerator:
  SkPath GetHighlightPath(const views::View* view) override {
    gfx::Rect rect(view->size());
    rect.Inset(GetToolbarInkDropInsets(view));

    const int radii = ChromeLayoutProvider::Get()->GetCornerRadiusMetric(
        views::Emphasis::kMaximum, rect.size());

    SkPath path;
    path.addRoundRect(gfx::RectToSkRect(rect), radii, radii);
    return path;
  }
};

}  // namespace

gfx::Insets GetToolbarInkDropInsets(const views::View* host_view) {
  gfx::Insets margin_insets;
  gfx::Insets* const internal_padding =
      host_view->GetProperty(views::kInternalPaddingKey);
  if (internal_padding)
    margin_insets = *internal_padding;

  // Inset the inkdrop insets so that the end result matches the target inkdrop
  // dimensions.
  const gfx::Size host_size = host_view->size();
  const int inkdrop_dimensions = GetLayoutConstant(LOCATION_BAR_HEIGHT);
  gfx::Insets inkdrop_insets =
      margin_insets +
      gfx::Insets(std::max(0, (host_size.height() - inkdrop_dimensions) / 2));

  return inkdrop_insets;
}

SkColor GetToolbarInkDropBaseColor(const views::View* host_view) {
  const auto* theme_provider = host_view->GetThemeProvider();
  // There may be no theme provider in unit tests.
  return theme_provider
             ? theme_provider->GetColor(ThemeProperties::COLOR_TOOLBAR_INK_DROP)
             : gfx::kPlaceholderColor;
}

void ConfigureInkDropForToolbar(views::Button* host) {
  host->SetHasInkDropActionOnClick(true);
  views::HighlightPathGenerator::Install(
      host, std::make_unique<ToolbarButtonHighlightPathGenerator>());
  views::InkDrop::Get(host)->SetMode(views::InkDropHost::InkDropMode::ON);
  views::InkDrop::Get(host)->SetVisibleOpacity(kToolbarInkDropVisibleOpacity);
  views::InkDrop::Get(host)->SetHighlightOpacity(
      kToolbarInkDropHighlightVisibleOpacity);
  views::InkDrop::Get(host)->SetBaseColorCallback(
      base::BindRepeating(&GetToolbarInkDropBaseColor, host));
}