[MD] re-skin extension browser action badges

chrome/browser/ui/extensions/icon_with_badge_image_source.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[Devlin, 2015/11/24 17:26:15]

Can you reduce the similarity count so that Rietveld recognizes this as a move?

[Evan Stade, 2015/11/24 18:24:14]

Done, but it decided it was a move of badge_util.cc

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/extensions/icon_with_badge_image_source.h"
+
+#include <algorithm>
+#include <cmath>
+
+#include "base/logging.h"
+#include "base/strings/utf_string_conversions.h"
+#include "third_party/skia/include/core/SkPaint.h"
+#include "third_party/skia/include/core/SkTypeface.h"
+#include "ui/base/resource/material_design/material_design_controller.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/color_palette.h"
+#include "ui/gfx/font.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/image/image_skia_operations.h"
+#include "ui/resources/grit/ui_resources.h"
+
+namespace {
+
+// Different platforms need slightly different constants to look good.
+// TODO(devlin): Comb through these and see if they are all still needed/
+// appropriate.
+#if defined(OS_WIN)
+const float kTextSize = 10;
+// The padding between the top of the badge and the top of the text.
+const int kTopTextPadding = -1;
+#elif defined(OS_MACOSX)
+const float kTextSize = 9.0;
+const int kTopTextPadding = 0;
+#elif defined(OS_CHROMEOS)
+const float kTextSize = 8.0;
+const int kTopTextPadding = 1;
+#elif defined(OS_POSIX)
+const float kTextSize = 9.0;
+const int kTopTextPadding = 0;
+#endif
+
+const int kPadding = 2;
+const int kBadgeHeight = 11;
+const int kMaxTextWidth = 23;
+
+// The minimum width for center-aligning the badge.
+const int kCenterAlignThreshold = 20;
+
+// Helper routine that returns a singleton SkPaint object configured for
+// rendering badge overlay text (correct font, typeface, etc).
+SkPaint* GetBadgeTextPaintSingleton() {
+#if defined(OS_MACOSX)
+  const char kPreferredTypeface[] = "Helvetica Bold";
+#else
+  const char kPreferredTypeface[] = "Arial";
+#endif
+
+  static SkPaint* text_paint = NULL;
+  if (!text_paint) {
+    text_paint = new SkPaint;
+    text_paint->setAntiAlias(true);
+    text_paint->setTextAlign(SkPaint::kLeft_Align);
+
+    skia::RefPtr<SkTypeface> typeface = skia::AdoptRef(
+        SkTypeface::CreateFromName(kPreferredTypeface, SkTypeface::kBold));
+    // Skia doesn't do any font fallback---if the user is missing the font then
+    // typeface will be NULL. If we don't do manual fallback then we'll crash.
+    if (typeface) {
+      text_paint->setFakeBoldText(true);
+    } else {
+      // Fall back to the system font. We don't bold it because we aren't sure
+      // how it will look.
+      // For the most part this code path will only be hit on Linux systems
+      // that don't have Arial.
+      ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+      const gfx::Font& base_font = rb.GetFont(ResourceBundle::BaseFont);
+      typeface = skia::AdoptRef(SkTypeface::CreateFromName(
+          base_font.GetFontName().c_str(), SkTypeface::kNormal));
+      DCHECK(typeface);
+    }
+
+    text_paint->setTypeface(typeface.get());
+    // |text_paint| adds its own ref. Release the ref from CreateFontName.
+  }
+  return text_paint;
+}
+
+}  // namespace
+
+IconWithBadgeImageSource::Badge::Badge(const std::string& text,
+                                       SkColor text_color,
+                                       SkColor background_color)
+    : text(text), text_color(text_color), background_color(background_color) {}
+
+IconWithBadgeImageSource::Badge::~Badge() {}
+
+IconWithBadgeImageSource::IconWithBadgeImageSource(const gfx::Size& size)
+    : gfx::CanvasImageSource(size, false),
+      grayscale_(false),
+      paint_decoration_(false) {}
+
+IconWithBadgeImageSource::~IconWithBadgeImageSource() {}
+
+void IconWithBadgeImageSource::SetIcon(const gfx::Image& icon) {
+  icon_ = icon;
+}
+
+void IconWithBadgeImageSource::SetBadge(scoped_ptr<Badge> badge) {
+  badge_ = badge.Pass();
+}
+
+void IconWithBadgeImageSource::Draw(gfx::Canvas* canvas) {
+  if (icon_.IsEmpty())
+    return;
+
+  int x_offset = std::floor((size().width() - icon_.Width()) / 2.0);
+  int y_offset = std::floor((size().height() - icon_.Height()) / 2.0);
+  gfx::ImageSkia skia = icon_.AsImageSkia();
+  if (grayscale_)
+    skia = gfx::ImageSkiaOperations::CreateHSLShiftedImage(skia, {-1, 0, 0.6});
+  canvas->DrawImageInt(skia, x_offset, y_offset);
+
+  // Draw a badge on the provided browser action icon's canvas.
+  PaintBadge(canvas);
+
+  if (paint_decoration_)
+    PaintDecoration(canvas);
+}
+
+// Paints badge with specified parameters to |canvas|.
+void IconWithBadgeImageSource::PaintBadge(gfx::Canvas* canvas) {
+  if (!badge_ || badge_->text.empty())
+    return;
+
+  SkColor text_color = SkColorGetA(badge_->text_color) == SK_AlphaTRANSPARENT
+                           ? SK_ColorWHITE
+                           : badge_->text_color;
+
+  SkColor background_color = ui::MaterialDesignController::IsModeMaterial()
+                                 ? gfx::kGoogleBlue500
+                                 : SkColorSetARGB(255, 218, 0, 24);
+  if (SkColorGetA(badge_->background_color) != SK_AlphaTRANSPARENT)
+    background_color = badge_->background_color;
+
+  canvas->Save();
+
+  SkPaint* text_paint = nullptr;
+  int text_width = 0;
+  ResourceBundle* rb = &ResourceBundle::GetSharedInstance();
+  gfx::FontList base_font = rb->GetFontList(ResourceBundle::BaseFont)
+                                .DeriveWithHeightUpperBound(kBadgeHeight);
+  base::string16 utf16_text = base::UTF8ToUTF16(badge_->text);
+  if (ui::MaterialDesignController::IsModeMaterial()) {
+    text_width =
+        std::min(kMaxTextWidth, canvas->GetStringWidth(utf16_text, base_font));
+  } else {
+    text_paint = GetBadgeTextPaintSingleton();
+    text_paint->setColor(text_color);
+    float scale = canvas->image_scale();
+
+    // Calculate text width. Font width may not be linear with respect to the
+    // scale factor (e.g. when hinting is applied), so we need to use the font
+    // size that canvas actually uses when drawing a text.
+    text_paint->setTextSize(SkFloatToScalar(kTextSize) * scale);
+    SkScalar sk_text_width_in_pixel =
+        text_paint->measureText(badge_->text.c_str(), badge_->text.size());
+    text_paint->setTextSize(SkFloatToScalar(kTextSize));
+
+    // We clamp the width to a max size. SkPaint::measureText returns the width
+    // in pixel (as a result of scale multiplier), so convert
+    // sk_text_width_in_pixel back to DIP (density independent pixel) first.
+    text_width = std::min(
+        kMaxTextWidth, static_cast<int>(std::ceil(
+                           SkScalarToFloat(sk_text_width_in_pixel) / scale)));
+  }
+
+  // Calculate badge size. It is clamped to a min width just because it looks
+  // silly if it is too skinny.
+  int badge_width = text_width + kPadding * 2;
+  // Force the pixel width of badge to be either odd (if the icon width is odd)
+  // or even otherwise. If there is a mismatch you get http://crbug.com/26400.
+  if (size().width() != 0 && (badge_width % 2 != size().width() % 2))
+    badge_width += 1;
+  badge_width = std::max(kBadgeHeight, badge_width);
+
+  // Paint the badge background color in the right location. It is usually
+  // right-aligned, but it can also be center-aligned if it is large.
+  gfx::Rect rect(badge_width >= kCenterAlignThreshold
+                     ? (size().width() - badge_width) / 2
+                     : size().width() - badge_width,
+                 size().height() - kBadgeHeight, badge_width, kBadgeHeight);
+  SkPaint rect_paint;
+  rect_paint.setStyle(SkPaint::kFill_Style);
+  rect_paint.setAntiAlias(true);
+  rect_paint.setColor(background_color);
+
+  if (ui::MaterialDesignController::IsModeMaterial()) {
+    gfx::Rect cutout_rect(rect);
+    cutout_rect.Inset(-1, -1);
+    SkPaint cutout_paint = rect_paint;
+    cutout_paint.setXfermodeMode(SkXfermode::kClear_Mode);
+    canvas->DrawRoundRect(cutout_rect, 2, cutout_paint);
+  }
+
+  canvas->DrawRoundRect(
+      rect, ui::MaterialDesignController::IsModeMaterial() ? 1 : 2, rect_paint);
+
+  if (ui::MaterialDesignController::IsModeMaterial()) {
+    rect.Inset(std::max(kPadding, (rect.width() - text_width) / 2),
+               kBadgeHeight - base_font.GetHeight(), kPadding, 0);
+    canvas->DrawStringRect(utf16_text, base_font, text_color, rect);
+  } else {
+    // Overlay the gradient. It is stretchy, so we do this in three parts.
+    ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
+    gfx::ImageSkia* gradient_left =
+        rb.GetImageSkiaNamed(IDR_BROWSER_ACTION_BADGE_LEFT);
+    gfx::ImageSkia* gradient_right =
+        rb.GetImageSkiaNamed(IDR_BROWSER_ACTION_BADGE_RIGHT);
+    gfx::ImageSkia* gradient_center =
+        rb.GetImageSkiaNamed(IDR_BROWSER_ACTION_BADGE_CENTER);
+
+    canvas->DrawImageInt(*gradient_left, rect.x(), rect.y());
+    canvas->TileImageInt(
+        *gradient_center, rect.x() + gradient_left->width(), rect.y(),
+        rect.width() - gradient_left->width() - gradient_right->width(),
+        rect.height());
+    canvas->DrawImageInt(*gradient_right,
+                         rect.right() - gradient_right->width(), rect.y());
+
+    // Finally, draw the text centered within the badge. We set a clip in case
+    // the text was too large.
+    rect.Inset(kPadding, 0);
+    canvas->ClipRect(rect);
+    canvas->sk_canvas()->drawText(
+        badge_->text.c_str(), badge_->text.size(),
+        SkFloatToScalar(rect.x() +
+                        static_cast<float>(rect.width() - text_width) / 2),
+        SkFloatToScalar(rect.y() + kTextSize + kTopTextPadding), *text_paint);
+  }
+  canvas->Restore();
+}
+
+void IconWithBadgeImageSource::PaintDecoration(gfx::Canvas* canvas) {
+  static const SkColor decoration_color = SkColorSetARGB(255, 70, 142, 226);
+
+  int major_radius = std::ceil(size().width() / 5.0);
+  int minor_radius = std::ceil(major_radius / 2.0);
+  gfx::Point center_point(major_radius + 1, size().height() - (major_radius)-1);
+  SkPaint paint;
+  paint.setAntiAlias(true);
+  paint.setStyle(SkPaint::kFill_Style);
+  paint.setColor(SK_ColorTRANSPARENT);
+  paint.setXfermodeMode(SkXfermode::kSrc_Mode);
+  canvas->DrawCircle(center_point, major_radius, paint);
+  paint.setColor(decoration_color);
+  canvas->DrawCircle(center_point, minor_radius, paint);
+}