tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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SVGImageContext.cpp (4680B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 // Main header first:
      8 #include "SVGImageContext.h"
      9 
     10 // Keep others in (case-insensitive) order:
     11 #include "gfxUtils.h"
     12 #include "mozilla/LookAndFeel.h"
     13 #include "mozilla/ServoCSSParser.h"
     14 #include "mozilla/StaticPrefs_svg.h"
     15 #include "mozilla/dom/Document.h"
     16 #include "nsIFrame.h"
     17 #include "nsISVGPaintContext.h"
     18 #include "nsPresContext.h"
     19 #include "nsStyleStruct.h"
     20 
     21 namespace mozilla {
     22 
     23 /* static */
     24 void SVGImageContext::MaybeStoreContextPaint(SVGImageContext& aContext,
     25                                             nsIFrame* aFromFrame,
     26                                             imgIContainer* aImgContainer) {
     27  return MaybeStoreContextPaint(aContext, *aFromFrame->PresContext(),
     28                                *aFromFrame->Style(), aImgContainer);
     29 }
     30 
     31 /* static */
     32 void SVGImageContext::MaybeStoreContextPaint(SVGImageContext& aContext,
     33                                             const nsPresContext& aPresContext,
     34                                             const ComputedStyle& aStyle,
     35                                             imgIContainer* aImgContainer) {
     36  if (aImgContainer->GetType() != imgIContainer::TYPE_VECTOR) {
     37    // Avoid this overhead for raster images.
     38    return;
     39  }
     40 
     41  {
     42    auto scheme = LookAndFeel::ColorSchemeForStyle(
     43        *aPresContext.Document(), aStyle.StyleUI()->mColorScheme.bits,
     44        ColorSchemeMode::Preferred);
     45    aContext.SetColorScheme(Some(scheme));
     46  }
     47 
     48  const nsStyleSVG* style = aStyle.StyleSVG();
     49  if (!style->ExposesContextProperties()) {
     50    // Content must have '-moz-context-properties' set to the names of the
     51    // properties it wants to expose to images it links to.
     52    return;
     53  }
     54 
     55  bool haveContextPaint = false;
     56 
     57  auto contextPaint = MakeRefPtr<SVGEmbeddingContextPaint>();
     58 
     59  if ((style->mMozContextProperties.bits & StyleContextPropertyBits::FILL) &&
     60      style->mFill.kind.IsColor()) {
     61    haveContextPaint = true;
     62    contextPaint->SetFill(style->mFill.kind.AsColor().CalcColor(aStyle));
     63  }
     64  if ((style->mMozContextProperties.bits & StyleContextPropertyBits::STROKE) &&
     65      style->mStroke.kind.IsColor()) {
     66    haveContextPaint = true;
     67    contextPaint->SetStroke(style->mStroke.kind.AsColor().CalcColor(aStyle));
     68  }
     69  if (style->mMozContextProperties.bits &
     70      StyleContextPropertyBits::FILL_OPACITY) {
     71    haveContextPaint = true;
     72    contextPaint->SetFillOpacity(style->mFillOpacity.IsOpacity()
     73                                     ? style->mFillOpacity.AsOpacity()
     74                                     : 1.0f);
     75  }
     76  if (style->mMozContextProperties.bits &
     77      StyleContextPropertyBits::STROKE_OPACITY) {
     78    haveContextPaint = true;
     79    contextPaint->SetStrokeOpacity(style->mStrokeOpacity.IsOpacity()
     80                                       ? style->mStrokeOpacity.AsOpacity()
     81                                       : 1.0f);
     82  }
     83 
     84  if (haveContextPaint) {
     85    aContext.mContextPaint = std::move(contextPaint);
     86  }
     87 }
     88 
     89 /* static */
     90 void SVGImageContext::MaybeStoreContextPaint(SVGImageContext& aContext,
     91                                             nsISVGPaintContext* aPaintContext,
     92                                             imgIContainer* aImgContainer) {
     93  if (aImgContainer->GetType() != imgIContainer::TYPE_VECTOR ||
     94      !aPaintContext) {
     95    // Avoid this overhead for raster images.
     96    return;
     97  }
     98 
     99  bool haveContextPaint = false;
    100  auto contextPaint = MakeRefPtr<SVGEmbeddingContextPaint>();
    101  nsCString value;
    102  float opacity;
    103 
    104  if (NS_SUCCEEDED(aPaintContext->GetStrokeColor(value)) && !value.IsEmpty()) {
    105    nscolor color;
    106    if (ServoCSSParser::ComputeColor(nullptr, NS_RGB(0, 0, 0), value, &color)) {
    107      haveContextPaint = true;
    108      contextPaint->SetStroke(color);
    109    }
    110  }
    111 
    112  if (NS_SUCCEEDED(aPaintContext->GetFillColor(value)) && !value.IsEmpty()) {
    113    nscolor color;
    114    if (ServoCSSParser::ComputeColor(nullptr, NS_RGB(0, 0, 0), value, &color)) {
    115      haveContextPaint = true;
    116      contextPaint->SetFill(color);
    117    }
    118  }
    119 
    120  if (NS_SUCCEEDED(aPaintContext->GetStrokeOpacity(&opacity))) {
    121    haveContextPaint = true;
    122    contextPaint->SetStrokeOpacity(opacity);
    123  }
    124 
    125  if (NS_SUCCEEDED(aPaintContext->GetFillOpacity(&opacity))) {
    126    haveContextPaint = true;
    127    contextPaint->SetFillOpacity(opacity);
    128  }
    129 
    130  if (haveContextPaint) {
    131    aContext.mContextPaint = std::move(contextPaint);
    132  }
    133 }
    134 
    135 }  // namespace mozilla