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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/win/text_analysis_source.h"
#include <string_view>
#include "base/check.h"
namespace gfx {
namespace win {
HRESULT TextAnalysisSource::Create(
IDWriteTextAnalysisSource** text_analysis_out,
const std::wstring& text,
const std::wstring& locale_name,
IDWriteNumberSubstitution* number_substitution,
DWRITE_READING_DIRECTION reading_direction) {
return Microsoft::WRL::MakeAndInitialize<gfx::win::TextAnalysisSource>(
text_analysis_out, text, locale_name, number_substitution,
reading_direction);
}
TextAnalysisSource::TextAnalysisSource() = default;
TextAnalysisSource::~TextAnalysisSource() = default;
HRESULT TextAnalysisSource::GetLocaleName(UINT32 text_position,
UINT32* text_length,
const WCHAR** locale_name) {
if (text_position >= text_.length() || !text_length || !locale_name)
return E_INVALIDARG;
*text_length = text_.length() - text_position;
*locale_name = locale_name_.c_str();
return S_OK;
}
HRESULT TextAnalysisSource::GetNumberSubstitution(
UINT32 text_position,
UINT32* text_length,
IDWriteNumberSubstitution** number_substitution) {
if (text_position >= text_.length() || !text_length || !number_substitution)
return E_INVALIDARG;
*text_length = text_.length() - text_position;
number_substitution_.CopyTo(number_substitution);
return S_OK;
}
DWRITE_READING_DIRECTION TextAnalysisSource::GetParagraphReadingDirection() {
return reading_direction_;
}
HRESULT TextAnalysisSource::GetTextAtPosition(UINT32 text_position,
const WCHAR** text_string,
UINT32* text_length) {
if (!text_length || !text_string)
return E_INVALIDARG;
if (text_position >= text_.length()) {
*text_string = nullptr;
*text_length = 0;
return S_OK;
}
std::wstring_view view(text_);
std::wstring_view substring = view.substr(text_position);
*text_string = substring.data();
*text_length = substring.length();
return S_OK;
}
HRESULT TextAnalysisSource::GetTextBeforePosition(UINT32 text_position,
const WCHAR** text_string,
UINT32* text_length) {
if (!text_length || !text_string)
return E_INVALIDARG;
if (text_position < 1 || text_position > text_.length()) {
*text_string = nullptr;
*text_length = 0;
return S_OK;
}
*text_string = text_.c_str();
*text_length = text_position;
return S_OK;
}
HRESULT TextAnalysisSource::RuntimeClassInitialize(
const std::wstring& text,
const std::wstring& locale_name,
IDWriteNumberSubstitution* number_substitution,
DWRITE_READING_DIRECTION reading_direction) {
DCHECK(number_substitution);
text_ = text;
locale_name_ = locale_name;
number_substitution_ = number_substitution;
reading_direction_ = reading_direction;
return S_OK;
}
} // namespace win
} // namespace gfx
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