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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsSVGTextPathFrame.h"
// Keep others in (case-insensitive) order:
#include "nsContentUtils.h"
#include "nsSVGEffects.h"
#include "nsSVGLength2.h"
#include "mozilla/dom/SVGPathElement.h"
#include "mozilla/dom/SVGTextPathElement.h"
#include "SVGLengthList.h"
using namespace mozilla;
using namespace mozilla::dom;
//----------------------------------------------------------------------
// Implementation
nsIFrame*
NS_NewSVGTextPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsSVGTextPathFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsSVGTextPathFrame)
#ifdef DEBUG
NS_IMETHODIMP
nsSVGTextPathFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aParent, "null parent");
nsIFrame* ancestorFrame = nsSVGUtils::GetFirstNonAAncestorFrame(aParent);
NS_ASSERTION(ancestorFrame, "Must have ancestor");
NS_ASSERTION(ancestorFrame->GetType() == nsGkAtoms::svgTextFrame,
"trying to construct an SVGTextPathFrame for an invalid "
"container");
NS_ASSERTION(aContent->IsSVG(nsGkAtoms::textPath),
"Content is not an SVG textPath");
return nsSVGTextPathFrameBase::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
nsIAtom *
nsSVGTextPathFrame::GetType() const
{
return nsGkAtoms::svgTextPathFrame;
}
void
nsSVGTextPathFrame::GetXY(SVGUserUnitList *aX, SVGUserUnitList *aY)
{
// 'x' and 'y' don't apply to 'textPath'
aX->Clear();
aY->Clear();
}
void
nsSVGTextPathFrame::GetDxDy(SVGUserUnitList *aDx, SVGUserUnitList *aDy)
{
// 'dx' and 'dy' don't apply to 'textPath'
aDx->Clear();
aDy->Clear();
}
const SVGNumberList*
nsSVGTextPathFrame::GetRotate()
{
return nullptr;
}
//----------------------------------------------------------------------
// nsSVGTextPathFrame methods:
nsIFrame *
nsSVGTextPathFrame::GetPathFrame()
{
nsSVGTextPathProperty *property = static_cast<nsSVGTextPathProperty*>
(Properties().Get(nsSVGEffects::HrefProperty()));
if (!property) {
SVGTextPathElement *tp = static_cast<SVGTextPathElement*>(mContent);
nsAutoString href;
tp->mStringAttributes[SVGTextPathElement::HREF].GetAnimValue(href, tp);
if (href.IsEmpty()) {
return nullptr; // no URL
}
nsCOMPtr<nsIURI> targetURI;
nsCOMPtr<nsIURI> base = mContent->GetBaseURI();
nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), href,
mContent->GetCurrentDoc(), base);
property =
nsSVGEffects::GetTextPathProperty(targetURI, this, nsSVGEffects::HrefProperty());
if (!property)
return nullptr;
}
nsIFrame *frame = property->GetReferencedFrame(nsGkAtoms::svgPathGeometryFrame, nullptr);
return frame && frame->GetContent()->Tag() == nsGkAtoms::path ? frame : nullptr;
}
already_AddRefed<gfxFlattenedPath>
nsSVGTextPathFrame::GetFlattenedPath()
{
nsIFrame *path = GetPathFrame();
if (path) {
nsSVGPathGeometryElement *element =
static_cast<nsSVGPathGeometryElement*>(path->GetContent());
return element->GetFlattenedPath(element->PrependLocalTransformsTo(gfxMatrix()));
}
return nullptr;
}
gfxFloat
nsSVGTextPathFrame::GetStartOffset()
{
SVGTextPathElement *tp = static_cast<SVGTextPathElement*>(mContent);
nsSVGLength2 *length = &tp->mLengthAttributes[SVGTextPathElement::STARTOFFSET];
if (length->IsPercentage()) {
nsRefPtr<gfxFlattenedPath> data = GetFlattenedPath();
return data ? (length->GetAnimValInSpecifiedUnits() * data->GetLength() / 100.0) : 0.0;
}
return length->GetAnimValue(tp) * GetOffsetScale();
}
gfxFloat
nsSVGTextPathFrame::GetOffsetScale()
{
nsIFrame *pathFrame = GetPathFrame();
if (!pathFrame)
return 1.0;
return static_cast<SVGPathElement*>(pathFrame->GetContent())->
GetPathLengthScale(SVGPathElement::eForTextPath);
}
//----------------------------------------------------------------------
// nsIFrame methods
NS_IMETHODIMP
nsSVGTextPathFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None &&
aAttribute == nsGkAtoms::startOffset) {
nsSVGUtils::InvalidateBounds(this, false);
nsSVGUtils::ScheduleReflowSVG(this);
NotifyGlyphMetricsChange();
} else if (aNameSpaceID == kNameSpaceID_XLink &&
aAttribute == nsGkAtoms::href) {
nsSVGUtils::InvalidateBounds(this, false);
nsSVGUtils::ScheduleReflowSVG(this);
// Blow away our reference, if any
Properties().Delete(nsSVGEffects::HrefProperty());
NotifyGlyphMetricsChange();
}
return NS_OK;
}
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