chromium/third_party/blink/renderer/core/layout/svg/svg_text_query.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/layout/svg/svg_text_query.h"

#include <unicode/utf16.h>

#include "third_party/blink/renderer/core/layout/inline/fragment_item.h"
#include "third_party/blink/renderer/core/layout/inline/inline_cursor.h"
#include "third_party/blink/renderer/core/layout/layout_box.h"
#include "third_party/blink/renderer/core/layout/physical_box_fragment.h"
#include "third_party/blink/renderer/core/layout/svg/layout_svg_inline_text.h"
#include "third_party/blink/renderer/core/layout/svg/layout_svg_text.h"
#include "third_party/blink/renderer/platform/fonts/shaping/shape_result_view.h"

namespace blink {

namespace {

unsigned AdjustCodeUnitStartOffset(StringView string, unsigned offset) { … }

unsigned AdjustCodeUnitEndOffset(StringView string, unsigned offset) { … }

std::tuple<Vector<const FragmentItem*>, const FragmentItems*>
FragmentItemsInVisualOrder(const LayoutObject& query_root) { … }

std::tuple<Vector<const FragmentItem*>, const FragmentItems*>
FragmentItemsInLogicalOrder(const LayoutObject& query_root) { … }

// Returns a tuple of FragmentItem, Item text, IFC text offset for |index|,
// and the next IFC text offset.
std::tuple<const FragmentItem*, StringView, unsigned, unsigned>
FindFragmentItemForAddressableCodeUnitIndex(const LayoutObject& query_root,
                                            unsigned index) { … }

void GetCanvasRotation(void* context,
                       unsigned,
                       Glyph,
                       gfx::Vector2dF,
                       float,
                       bool,
                       CanvasRotationInVertical rotation,
                       const SimpleFontData*) { … }

float InlineSize(const FragmentItem& item,
                 StringView item_text,
                 unsigned start_code_unit_offset,
                 unsigned end_code_unit_offset) { … }

std::tuple<const FragmentItem*, gfx::RectF> ScaledCharacterRectInContainer(
    const LayoutObject& query_root,
    unsigned code_unit_index) { … }

enum class QueryPosition { … };
gfx::PointF StartOrEndPosition(const LayoutObject& query_root,
                               unsigned index,
                               QueryPosition pos) { … }

}  // namespace

unsigned SvgTextQuery::NumberOfCharacters() const { … }

float SvgTextQuery::SubStringLength(unsigned start_index,
                                    unsigned length) const { … }

gfx::PointF SvgTextQuery::StartPositionOfCharacter(unsigned index) const { … }

gfx::PointF SvgTextQuery::EndPositionOfCharacter(unsigned index) const { … }

gfx::RectF SvgTextQuery::ExtentOfCharacter(unsigned index) const { … }

float SvgTextQuery::RotationOfCharacter(unsigned index) const { … }

// https://svgwg.org/svg2-draft/text.html#__svg__SVGTextContentElement__getCharNumAtPosition
int SvgTextQuery::CharacterNumberAtPosition(const gfx::PointF& position) const { … }

}  // namespace blink