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/* -*- 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/. */
#include "mozilla/dom/SVGTextContentElement.h"
#include "DOMSVGPoint.h"
#include "SVGTextFrame.h"
#include "mozilla/dom/CharacterDataBuffer.h"
#include "mozilla/dom/SVGLengthBinding.h"
#include "mozilla/dom/SVGRect.h"
#include "mozilla/dom/SVGTextContentElementBinding.h"
#include "nsBidiUtils.h"
#include "nsLayoutUtils.h"
#include "nsTextFrameUtils.h"
#include "nsTextNode.h"
namespace mozilla::dom {
using namespace SVGTextContentElement_Binding;
SVGEnumMapping SVGTextContentElement::sLengthAdjustMap[] = {
{nsGkAtoms::spacing, LENGTHADJUST_SPACING},
{nsGkAtoms::spacingAndGlyphs, LENGTHADJUST_SPACINGANDGLYPHS},
{nullptr, 0}};
SVGElement::EnumInfo SVGTextContentElement::sEnumInfo[1] = {
{nsGkAtoms::lengthAdjust, sLengthAdjustMap, LENGTHADJUST_SPACING}};
SVGElement::LengthInfo SVGTextContentElement::sLengthInfo[1] = {
{nsGkAtoms::textLength, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER,
SVGContentUtils::XY}};
SVGTextFrame* SVGTextContentElement::GetSVGTextFrame() {
nsIFrame* frame = GetPrimaryFrame(FlushType::Layout);
nsIFrame* textFrame =
nsLayoutUtils::GetClosestFrameOfType(frame, LayoutFrameType::SVGText);
return static_cast<SVGTextFrame*>(textFrame);
}
SVGTextFrame*
SVGTextContentElement::GetSVGTextFrameForNonLayoutDependentQuery() {
nsIFrame* frame = GetPrimaryFrame(FlushType::Frames);
nsIFrame* textFrame =
nsLayoutUtils::GetClosestFrameOfType(frame, LayoutFrameType::SVGText);
return static_cast<SVGTextFrame*>(textFrame);
}
already_AddRefed<DOMSVGAnimatedLength> SVGTextContentElement::TextLength() {
return LengthAttributes()[TEXTLENGTH].ToDOMAnimatedLength(this);
}
already_AddRefed<DOMSVGAnimatedEnumeration>
SVGTextContentElement::LengthAdjust() {
return EnumAttributes()[LENGTHADJUST].ToDOMAnimatedEnum(this);
}
//----------------------------------------------------------------------
template <typename T>
static bool FragmentHasSkippableCharacter(const T* aBuffer, uint32_t aLength) {
for (uint32_t i = 0; i < aLength; i++) {
if (nsTextFrameUtils::IsSkippableCharacterForTransformText(aBuffer[i])) {
return true;
}
}
return false;
}
Maybe<int32_t> SVGTextContentElement::GetNonLayoutDependentNumberOfChars() {
SVGTextFrame* frame = GetSVGTextFrameForNonLayoutDependentQuery();
if (!frame || frame != GetPrimaryFrame()) {
// Only support this fast path on <text>, not child <tspan>s, etc.
return Nothing();
}
uint32_t num = 0;
for (nsINode* n = Element::GetFirstChild(); n; n = n->GetNextSibling()) {
if (!n->IsText()) {
return Nothing();
}
const CharacterDataBuffer* characterDataBuffer = &n->AsText()->DataBuffer();
uint32_t length = characterDataBuffer->GetLength();
if (characterDataBuffer->Is2b()) {
if (FragmentHasSkippableCharacter(characterDataBuffer->Get2b(), length)) {
return Nothing();
}
} else {
const auto* buffer =
reinterpret_cast<const uint8_t*>(characterDataBuffer->Get1b());
if (FragmentHasSkippableCharacter(buffer, length)) {
return Nothing();
}
}
num += length;
}
return Some(num);
}
int32_t SVGTextContentElement::GetNumberOfChars() {
Maybe<int32_t> num = GetNonLayoutDependentNumberOfChars();
if (num) {
return *num;
}
SVGTextFrame* textFrame = GetSVGTextFrame();
return textFrame ? textFrame->GetNumberOfChars(this) : 0;
}
float SVGTextContentElement::GetComputedTextLength() {
SVGTextFrame* textFrame = GetSVGTextFrame();
return textFrame ? textFrame->GetComputedTextLength(this) : 0.0f;
}
void SVGTextContentElement::SelectSubString(uint32_t charnum, uint32_t nchars,
ErrorResult& rv) {
SVGTextFrame* textFrame = GetSVGTextFrame();
if (!textFrame) return;
textFrame->SelectSubString(this, charnum, nchars, rv);
}
float SVGTextContentElement::GetSubStringLength(uint32_t charnum,
uint32_t nchars,
ErrorResult& rv) {
SVGTextFrame* textFrame = GetSVGTextFrameForNonLayoutDependentQuery();
if (!textFrame) return 0.0f;
if (!textFrame->RequiresSlowFallbackForSubStringLength()) {
return textFrame->GetSubStringLengthFastPath(this, charnum, nchars, rv);
}
// We need to make sure that we've been reflowed before using the slow
// fallback path as it may affect glyph positioning. GetSVGTextFrame will do
// that for us.
// XXX perf: It may be possible to limit reflow to just calling ReflowSVG,
// but we would still need to resort to full reflow for percentage
// positioning attributes. For now we just do a full reflow regardless
// since the cases that would cause us to be called are relatively uncommon.
textFrame = GetSVGTextFrame();
if (!textFrame) return 0.0f;
return textFrame->GetSubStringLengthSlowFallback(this, charnum, nchars, rv);
}
already_AddRefed<DOMSVGPoint> SVGTextContentElement::GetStartPositionOfChar(
uint32_t charnum, ErrorResult& rv) {
SVGTextFrame* textFrame = GetSVGTextFrame();
if (!textFrame) {
rv.ThrowInvalidStateError("No layout information available for SVG text");
return nullptr;
}
return textFrame->GetStartPositionOfChar(this, charnum, rv);
}
already_AddRefed<DOMSVGPoint> SVGTextContentElement::GetEndPositionOfChar(
uint32_t charnum, ErrorResult& rv) {
SVGTextFrame* textFrame = GetSVGTextFrame();
if (!textFrame) {
rv.ThrowInvalidStateError("No layout information available for SVG text");
return nullptr;
}
return textFrame->GetEndPositionOfChar(this, charnum, rv);
}
already_AddRefed<SVGRect> SVGTextContentElement::GetExtentOfChar(
uint32_t charnum, ErrorResult& rv) {
SVGTextFrame* textFrame = GetSVGTextFrame();
if (!textFrame) {
rv.ThrowInvalidStateError("No layout information available for SVG text");
return nullptr;
}
return textFrame->GetExtentOfChar(this, charnum, rv);
}
float SVGTextContentElement::GetRotationOfChar(uint32_t charnum,
ErrorResult& rv) {
SVGTextFrame* textFrame = GetSVGTextFrame();
if (!textFrame) {
rv.ThrowInvalidStateError("No layout information available for SVG text");
return 0.0f;
}
return textFrame->GetRotationOfChar(this, charnum, rv);
}
int32_t SVGTextContentElement::GetCharNumAtPosition(
const DOMPointInit& aPoint) {
SVGTextFrame* textFrame = GetSVGTextFrame();
return textFrame ? textFrame->GetCharNumAtPosition(this, aPoint) : -1;
}
} // namespace mozilla::dom
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