1 files changed, 192 insertions, 0 deletions
diff --git a/dom/svg/SVGTextContentElement.cpp b/dom/svg/SVGTextContentElement.cpp
new file mode 100644
index 0000000000..55f4490263
--- /dev/null
+++ b/dom/svg/SVGTextContentElement.cpp
@@ -0,0 +1,192 @@
+/* -*- 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 "mozilla/dom/SVGLengthBinding.h"
+#include "mozilla/dom/SVGTextContentElementBinding.h"
+#include "mozilla/dom/SVGRect.h"
+#include "nsBidiUtils.h"
+#include "DOMSVGPoint.h"
+#include "nsLayoutUtils.h"
+#include "nsTextFragment.h"
+#include "nsTextFrameUtils.h"
+#include "nsTextNode.h"
+#include "SVGTextFrame.h"
+
+namespace mozilla {
+namespace 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 Some(0);
+  }
+
+  uint32_t num = 0;
+
+  for (nsINode* n = Element::GetFirstChild(); n; n = n->GetNextSibling()) {
+    if (!n->IsText()) {
+      return Nothing();
+    }
+
+    const nsTextFragment* text = &n->AsText()->TextFragment();
+    uint32_t length = text->GetLength();
+
+    if (text->Is2b()) {
+      if (FragmentHasSkippableCharacter(text->Get2b(), length)) {
+        return Nothing();
+      }
+    } else {
+      auto buffer = reinterpret_cast<const uint8_t*>(text->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;
+
+  return textFrame->GetSubStringLength(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 dom
+}  // namespace mozilla