chrome/browser/ui/omnibox/location_bar_util.cc

   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/browser/ui/omnibox/location_bar_util.h"
   6
   7 #include "base/i18n/rtl.h"
   8 #include "base/strings/string_util.h"
   9 #include "chrome/browser/extensions/extension_action.h"
  10 #include "third_party/skia/include/core/SkPaint.h"
  11 #include "third_party/skia/include/effects/SkGradientShader.h"
  12 #include "ui/gfx/canvas.h"
  13 #include "ui/gfx/color_utils.h"
  14 #include "ui/gfx/rect.h"
  15 #include "ui/gfx/text_elider.h"
  16
  17 namespace location_bar_util {
  18
  19 base::string16 CalculateMinString(const base::string16& description) {
  20   // Chop at the first '.' or whitespace.
  21   const size_t dot_index = description.find('.');
  22   const size_t ws_index = description.find_first_of(base::kWhitespaceUTF16);
  23   size_t chop_index = std::min(dot_index, ws_index);
  24   base::string16 min_string;
  25   if (chop_index == base::string16::npos) {
  26     // No dot or whitespace, truncate to at most 3 chars.
  27     min_string = gfx::TruncateString(description, 3);
  28   } else {
  29     min_string = description.substr(0, chop_index);
  30   }
  31   base::i18n::AdjustStringForLocaleDirection(&min_string);
  32   return min_string;
  33 }
  34
  35
  36 void PaintExtensionActionBackground(const ExtensionAction& action,
  37                                     int tab_id,
  38                                     gfx::Canvas* canvas,
  39                                     const gfx::Rect& bounds,
  40                                     SkColor text_color,
  41                                     SkColor background_color) {
  42   if (!action.WantsAttention(tab_id))
  43     return;
  44
  45   SkPoint gradient_bounds[2] = { {SkIntToScalar(bounds.x()),
  46                                   SkIntToScalar(bounds.y())},
  47                                  {SkIntToScalar(bounds.x()),
  48                                   SkIntToScalar(bounds.bottom())} };
  49   SkColor gradient_colors[2] = {
  50     color_utils::AlphaBlend(text_color, background_color, 0x13),
  51     color_utils::AlphaBlend(text_color, background_color, 0x1d)
  52   };
  53   skia::RefPtr<SkShader> gradient = skia::AdoptRef(
  54       SkGradientShader::CreateLinear(gradient_bounds, gradient_colors,
  55                                      NULL, 2, SkShader::kClamp_TileMode));
  56   SkPaint paint;
  57   paint.setShader(gradient.get());
  58   canvas->DrawRect(bounds, paint);
  59
  60   SkColor border_color =
  61       color_utils::AlphaBlend(text_color, background_color, 0x55);
  62   canvas->DrawLine(bounds.origin(),
  63                    gfx::Point(bounds.x(), bounds.bottom()),
  64                    border_color);
  65   // "-1" because gfx::Rects are half-open, not including their right or
  66   // bottom edges.
  67   canvas->DrawLine(gfx::Point(bounds.right() - 1, bounds.y()),
  68                    gfx::Point(bounds.right() - 1, bounds.bottom()),
  69                    border_color);
  70 }
  71
  72 }  // namespace location_bar_util