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// Copyright (c) 2010 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/common/extensions/extension_action.h"
#include "app/gfx/canvas.h"
#include "app/gfx/font.h"
#include "app/resource_bundle.h"
#include "base/gfx/rect.h"
#include "base/string_util.h"
#include "chrome/app/chrome_dll_resource.h"
#include "grit/app_resources.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkTypeface.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
namespace {
// Different platforms need slightly different constants to look good.
#if defined(OS_LINUX) && !defined(TOOLKIT_VIEWS)
const int kTextSize = 9;
const int kBottomMargin = 0;
const int kPadding = 2;
const int kTopTextPadding = 0;
#elif defined(OS_LINUX) && defined(TOOLKIT_VIEWS)
const int kTextSize = 8;
const int kBottomMargin = 5;
const int kPadding = 2;
const int kTopTextPadding = 1;
#elif defined(OS_MACOSX)
const int kTextSize = 9;
const int kBottomMargin = 5;
const int kPadding = 2;
const int kTopTextPadding = 0;
#else
const int kTextSize = 7;
const int kBottomMargin = 5;
const int kPadding = 2;
// The padding between the top of the badge and the top of the text.
const int kTopTextPadding = 2;
#endif
const int kBadgeHeight = 11;
const int kMaxTextWidth = 23;
// The minimum width for center-aligning the badge.
const int kCenterAlignThreshold = 20;
#if defined(OS_MACOSX)
const char kPreferredTypeface[] = "Helvetica Bold";
#else
const char kPreferredTypeface[] = "Arial";
#endif
SkPaint* GetTextPaint() {
static SkPaint* text_paint = NULL;
if (!text_paint) {
text_paint = new SkPaint;
text_paint->setAntiAlias(true);
text_paint->setTextAlign(SkPaint::kLeft_Align);
text_paint->setTextSize(SkIntToScalar(kTextSize));
SkTypeface* typeface = 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 = SkTypeface::CreateFromName(
WideToUTF8(base_font.FontName()).c_str(), SkTypeface::kNormal);
}
text_paint->setTypeface(typeface);
// |text_paint| adds its own ref. Release the ref from CreateFontName.
typeface->unref();
}
return text_paint;
}
} // namespace
const int ExtensionAction::kDefaultTabId = -1;
void ExtensionAction::ClearAllValuesForTab(int tab_id) {
title_.erase(tab_id);
icon_.erase(tab_id);
icon_index_.erase(tab_id);
badge_text_.erase(tab_id);
badge_text_color_.erase(tab_id);
badge_background_color_.erase(tab_id);
visible_.erase(tab_id);
popup_url_.erase(tab_id);
}
void ExtensionAction::PaintBadge(gfx::Canvas* canvas,
const gfx::Rect& bounds,
int tab_id) {
std::string text = GetBadgeText(tab_id);
if (text.empty())
return;
SkColor text_color = GetBadgeTextColor(tab_id);
SkColor background_color = GetBadgeBackgroundColor(tab_id);
if (SkColorGetA(text_color) == 0x00)
text_color = SK_ColorWHITE;
if (SkColorGetA(background_color) == 0x00)
background_color = SkColorSetARGB(255, 218, 0, 24); // Default badge color.
canvas->save();
SkPaint* text_paint = GetTextPaint();
text_paint->setColor(text_color);
// Calculate text width. We clamp it to a max size.
SkScalar text_width = text_paint->measureText(text.c_str(), text.size());
text_width = SkIntToScalar(
std::min(kMaxTextWidth, SkScalarFloor(text_width)));
// Calculate badge size. It is clamped to a min width just because it looks
// silly if it is too skinny.
int badge_width = SkScalarFloor(text_width) + kPadding * 2;
int icon_width = GetIcon(tab_id).width();
// 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 (icon_width != 0 && (badge_width % 2 != GetIcon(tab_id).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.
SkRect rect;
rect.fBottom = SkIntToScalar(bounds.bottom() - kBottomMargin);
rect.fTop = rect.fBottom - SkIntToScalar(kBadgeHeight);
if (badge_width >= kCenterAlignThreshold) {
rect.fLeft = SkIntToScalar(
SkScalarFloor(SkIntToScalar(bounds.x()) +
SkIntToScalar(bounds.width() / 2.0) -
SkIntToScalar(badge_width / 2.0)));
rect.fRight = rect.fLeft + SkIntToScalar(badge_width);
} else {
rect.fRight = SkIntToScalar(bounds.right());
rect.fLeft = rect.fRight - badge_width;
}
SkPaint rect_paint;
rect_paint.setStyle(SkPaint::kFill_Style);
rect_paint.setAntiAlias(true);
rect_paint.setColor(background_color);
canvas->drawRoundRect(rect, SkIntToScalar(2), SkIntToScalar(2), rect_paint);
// Overlay the gradient. It is stretchy, so we do this in three parts.
ResourceBundle& resource_bundle = ResourceBundle::GetSharedInstance();
SkBitmap* gradient_left = resource_bundle.GetBitmapNamed(
IDR_BROWSER_ACTION_BADGE_LEFT);
SkBitmap* gradient_right = resource_bundle.GetBitmapNamed(
IDR_BROWSER_ACTION_BADGE_RIGHT);
SkBitmap* gradient_center = resource_bundle.GetBitmapNamed(
IDR_BROWSER_ACTION_BADGE_CENTER);
canvas->drawBitmap(*gradient_left, rect.fLeft, rect.fTop);
canvas->TileImageInt(*gradient_center,
SkScalarFloor(rect.fLeft) + gradient_left->width(),
SkScalarFloor(rect.fTop),
SkScalarFloor(rect.width()) - gradient_left->width() -
gradient_right->width(),
SkScalarFloor(rect.height()));
canvas->drawBitmap(*gradient_right,
rect.fRight - SkIntToScalar(gradient_right->width()), rect.fTop);
// Finally, draw the text centered within the badge. We set a clip in case the
// text was too large.
rect.fLeft += kPadding;
rect.fRight -= kPadding;
canvas->clipRect(rect);
canvas->drawText(text.c_str(), text.size(),
rect.fLeft + (rect.width() - text_width) / 2,
rect.fTop + kTextSize + kTopTextPadding,
*text_paint);
canvas->restore();
}
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