DisplaySVGItem.cpp

Enable keyboard shortcuts

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// Main header first:

#include "DisplaySVGItem.h"

#include "mozilla/ISVGDisplayableFrame.h"

#include "mozilla/SVGUtils.h"

#include "nsLayoutUtils.h"

#include "nsPoint.h"

using namespace mozilla::gfx;

using namespace mozilla::image;

namespace mozilla {

void DisplaySVGItem::HitTest(nsDisplayListBuilder* aBuilder,

                             const nsRect& aRect, HitTestState* aState,

                             nsTArray<nsIFrame*>* aOutFrames) {

  ISVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);

  MOZ_ASSERT(svgFrame, "Unexpected frame type");

  nsPoint pointRelativeToReferenceFrame = aRect.Center();

  // ToReferenceFrame() includes mFrame->GetPosition(), our user

  // space position.

  nsPoint userSpacePtInAppUnits = pointRelativeToReferenceFrame -

                                  (ToReferenceFrame() - mFrame->GetPosition());

  gfxPoint userSpacePt =

      gfxPoint(userSpacePtInAppUnits.x, userSpacePtInAppUnits.y) /

      AppUnitsPerCSSPixel();

  if (auto* target = svgFrame->GetFrameForPoint(userSpacePt)) {

    aOutFrames->AppendElement(target);

void DisplaySVGItem::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {

  ISVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);

  MOZ_ASSERT(svgFrame, "Unexpected frame type");

  int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();

  // ToReferenceFrame() includes our mRect offset, but painting takes

  // account of that too. To avoid double counting, we subtract that

  // here.

  nsPoint offset = ToReferenceFrame() - mFrame->GetPosition();

  gfxPoint devPixelOffset =

      nsLayoutUtils::PointToGfxPoint(offset, appUnitsPerDevPixel);

  gfxMatrix tm = SVGUtils::GetCSSPxToDevPxMatrix(mFrame) *

                 gfxMatrix::Translation(devPixelOffset);

  imgDrawingParams imgParams(aBuilder->GetImageDecodeFlags());

  svgFrame->PaintSVG(*aCtx, tm, imgParams);

}  // namespace mozilla