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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/common/badge_util.h" | |
| 6 | |
| 7 #include <cmath> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "base/strings/utf_string_conversions.h" | |
| 11 #include "third_party/skia/include/core/SkPaint.h" | |
| 12 #include "third_party/skia/include/core/SkTypeface.h" | |
| 13 #include "ui/base/resource/resource_bundle.h" | |
| 14 #include "ui/gfx/canvas.h" | |
| 15 #include "ui/gfx/font.h" | |
| 16 #include "ui/gfx/geometry/rect.h" | |
| 17 #include "ui/gfx/geometry/size.h" | |
| 18 #include "ui/resources/grit/ui_resources.h" | |
| 19 | |
| 20 namespace { | |
| 21 | |
| 22 // Different platforms need slightly different constants to look good. | |
| 23 // TODO(devlin): Comb through these and see if they are all still needed/ | |
| 24 // appropriate. | |
| 25 #if defined(OS_WIN) | |
| 26 const float kTextSize = 10; | |
| 27 // The padding between the top of the badge and the top of the text. | |
| 28 const int kTopTextPadding = -1; | |
| 29 #elif defined(OS_MACOSX) | |
| 30 const float kTextSize = 9.0; | |
| 31 const int kTopTextPadding = 0; | |
| 32 #elif defined(OS_CHROMEOS) | |
| 33 const float kTextSize = 8.0; | |
| 34 const int kTopTextPadding = 1; | |
| 35 #elif defined(OS_POSIX) | |
| 36 const float kTextSize = 9.0; | |
| 37 const int kTopTextPadding = 0; | |
| 38 #endif | |
| 39 | |
| 40 const int kPadding = 2; | |
| 41 const int kBadgeHeight = 11; | |
| 42 const int kMaxTextWidth = 23; | |
| 43 | |
| 44 // The minimum width for center-aligning the badge. | |
| 45 const int kCenterAlignThreshold = 20; | |
| 46 | |
| 47 } // namespace | |
| 48 | |
| 49 namespace badge_util { | |
| 50 | |
| 51 SkPaint* GetBadgeTextPaintSingleton() { | |
| 52 #if defined(OS_MACOSX) | |
| 53 const char kPreferredTypeface[] = "Helvetica Bold"; | |
| 54 #else | |
| 55 const char kPreferredTypeface[] = "Arial"; | |
| 56 #endif | |
| 57 | |
| 58 static SkPaint* text_paint = NULL; | |
| 59 if (!text_paint) { | |
| 60 text_paint = new SkPaint; | |
| 61 text_paint->setAntiAlias(true); | |
| 62 text_paint->setTextAlign(SkPaint::kLeft_Align); | |
| 63 | |
| 64 skia::RefPtr<SkTypeface> typeface = skia::AdoptRef( | |
| 65 SkTypeface::CreateFromName(kPreferredTypeface, SkTypeface::kBold)); | |
| 66 // Skia doesn't do any font fallback---if the user is missing the font then | |
| 67 // typeface will be NULL. If we don't do manual fallback then we'll crash. | |
| 68 if (typeface) { | |
| 69 text_paint->setFakeBoldText(true); | |
| 70 } else { | |
| 71 // Fall back to the system font. We don't bold it because we aren't sure | |
| 72 // how it will look. | |
| 73 // For the most part this code path will only be hit on Linux systems | |
| 74 // that don't have Arial. | |
| 75 ResourceBundle& rb = ResourceBundle::GetSharedInstance(); | |
| 76 const gfx::Font& base_font = rb.GetFont(ResourceBundle::BaseFont); | |
| 77 typeface = skia::AdoptRef(SkTypeface::CreateFromName( | |
| 78 base_font.GetFontName().c_str(), SkTypeface::kNormal)); | |
| 79 DCHECK(typeface); | |
| 80 } | |
| 81 | |
| 82 text_paint->setTypeface(typeface.get()); | |
| 83 // |text_paint| adds its own ref. Release the ref from CreateFontName. | |
| 84 } | |
| 85 return text_paint; | |
| 86 } | |
| 87 | |
| 88 void PaintBadge(gfx::Canvas* canvas, | |
| 89 const gfx::Rect& bounds, | |
| 90 const std::string& text, | |
| 91 const SkColor& text_color_in, | |
| 92 const SkColor& background_color_in, | |
| 93 int icon_width) { | |
| 94 if (text.empty()) | |
| 95 return; | |
| 96 | |
| 97 SkColor text_color = text_color_in; | |
| 98 if (SkColorGetA(text_color_in) == 0x00) | |
| 99 text_color = SK_ColorWHITE; | |
| 100 | |
| 101 SkColor background_color = background_color_in; | |
| 102 if (SkColorGetA(background_color_in) == 0x00) | |
| 103 background_color = SkColorSetARGB(255, 218, 0, 24); | |
| 104 | |
| 105 canvas->Save(); | |
| 106 | |
| 107 SkPaint* text_paint = badge_util::GetBadgeTextPaintSingleton(); | |
| 108 text_paint->setColor(text_color); | |
| 109 float scale = canvas->image_scale(); | |
| 110 | |
| 111 // Calculate text width. Font width may not be linear with respect to the | |
| 112 // scale factor (e.g. when hinting is applied), so we need to use the font | |
| 113 // size that canvas actually uses when drawing a text. | |
| 114 text_paint->setTextSize(SkFloatToScalar(kTextSize) * scale); | |
| 115 SkScalar sk_text_width_in_pixel = | |
| 116 text_paint->measureText(text.c_str(), text.size()); | |
| 117 text_paint->setTextSize(SkFloatToScalar(kTextSize)); | |
| 118 | |
| 119 // We clamp the width to a max size. SkPaint::measureText returns the width in | |
| 120 // pixel (as a result of scale multiplier), so convert sk_text_width_in_pixel | |
| 121 // back to DIP (density independent pixel) first. | |
| 122 int text_width = | |
| 123 std::min(kMaxTextWidth, | |
| 124 static_cast<int>( | |
| 125 std::ceil(SkScalarToFloat(sk_text_width_in_pixel) / scale))); | |
| 126 | |
| 127 // Calculate badge size. It is clamped to a min width just because it looks | |
| 128 // silly if it is too skinny. | |
| 129 int badge_width = text_width + kPadding * 2; | |
| 130 // Force the pixel width of badge to be either odd (if the icon width is odd) | |
| 131 // or even otherwise. If there is a mismatch you get http://crbug.com/26400. | |
| 132 if (icon_width != 0 && (badge_width % 2 != icon_width % 2)) | |
| 133 badge_width += 1; | |
| 134 badge_width = std::max(kBadgeHeight, badge_width); | |
| 135 | |
| 136 // Paint the badge background color in the right location. It is usually | |
| 137 // right-aligned, but it can also be center-aligned if it is large. | |
| 138 int rect_height = kBadgeHeight; | |
| 139 int rect_y = bounds.bottom() - kBadgeHeight; | |
| 140 int rect_width = badge_width; | |
| 141 int rect_x = (badge_width >= kCenterAlignThreshold) ? | |
| 142 bounds.x() + (bounds.width() - badge_width) / 2 : | |
| 143 bounds.right() - badge_width; | |
| 144 gfx::Rect rect(rect_x, rect_y, rect_width, rect_height); | |
| 145 | |
| 146 SkPaint rect_paint; | |
| 147 rect_paint.setStyle(SkPaint::kFill_Style); | |
| 148 rect_paint.setAntiAlias(true); | |
| 149 rect_paint.setColor(background_color); | |
| 150 canvas->DrawRoundRect(rect, 2, rect_paint); | |
| 151 | |
| 152 // Overlay the gradient. It is stretchy, so we do this in three parts. | |
| 153 ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance(); | |
| 154 gfx::ImageSkia* gradient_left = rb.GetImageSkiaNamed( | |
| 155 IDR_BROWSER_ACTION_BADGE_LEFT); | |
| 156 gfx::ImageSkia* gradient_right = rb.GetImageSkiaNamed( | |
| 157 IDR_BROWSER_ACTION_BADGE_RIGHT); | |
| 158 gfx::ImageSkia* gradient_center = rb.GetImageSkiaNamed( | |
| 159 IDR_BROWSER_ACTION_BADGE_CENTER); | |
| 160 | |
| 161 canvas->DrawImageInt(*gradient_left, rect.x(), rect.y()); | |
| 162 canvas->TileImageInt(*gradient_center, | |
| 163 rect.x() + gradient_left->width(), | |
| 164 rect.y(), | |
| 165 rect.width() - gradient_left->width() - gradient_right->width(), | |
| 166 rect.height()); | |
| 167 canvas->DrawImageInt(*gradient_right, | |
| 168 rect.right() - gradient_right->width(), rect.y()); | |
| 169 | |
| 170 // Finally, draw the text centered within the badge. We set a clip in case the | |
| 171 // text was too large. | |
| 172 rect.Inset(kPadding, 0); | |
| 173 canvas->ClipRect(rect); | |
| 174 canvas->sk_canvas()->drawText( | |
| 175 text.c_str(), text.size(), | |
| 176 SkFloatToScalar(rect.x() + | |
| 177 static_cast<float>(rect.width() - text_width) / 2), | |
| 178 SkFloatToScalar(rect.y() + kTextSize + kTopTextPadding), | |
| 179 *text_paint); | |
| 180 canvas->Restore(); | |
| 181 } | |
| 182 | |
| 183 } // namespace badge_util | |
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Chromium Code Reviews
Issue 1472863004:
[MD] re-skin extension browser action badges (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master