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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "platform/text/Hyphenation.h"
#include "platform/fonts/Font.h"
#include "wtf/text/StringView.h"
namespace blink {
Vector<size_t, 8> Hyphenation::hyphenLocations(const StringView& text) const {
Vector<size_t, 8> hyphenLocations;
size_t hyphenLocation = text.length();
if (hyphenLocation <= minimumSuffixLength)
return hyphenLocations;
hyphenLocation -= minimumSuffixLength;
while ((hyphenLocation = lastHyphenLocation(text, hyphenLocation)) >=
minimumPrefixLength)
hyphenLocations.push_back(hyphenLocation);
return hyphenLocations;
}
int Hyphenation::minimumPrefixWidth(const Font& font) {
// If the maximum width available for the prefix before the hyphen is small,
// then it is very unlikely that an hyphenation opportunity exists, so do not
// bother to look for it. These are heuristic numbers for performance added
// in http://wkb.ug/45606
const int minimumPrefixWidthNumerator = 5;
const int minimumPrefixWidthDenominator = 4;
return font.getFontDescription().computedPixelSize() *
minimumPrefixWidthNumerator / minimumPrefixWidthDenominator;
}
} // namespace blink
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