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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include "minikin/Hyphenator.h"
#include "minikin/LineBreaker.h"
#include "LocaleListCache.h"
#include "MinikinInternal.h"
#include "UnicodeUtils.h"
namespace minikin {
namespace line_breaker_test_helper {
class RectangleLineWidth : public LineWidth {
public:
RectangleLineWidth(float width) : mWidth(width) {}
virtual ~RectangleLineWidth() {}
float getAt(size_t) const override { return mWidth; }
float getMin() const override { return mWidth; }
private:
float mWidth;
};
// The run implemenataion for returning the same width for all characters.
class ConstantRun : public Run {
public:
ConstantRun(const Range& range, const std::string& lang, float width, float ascent,
float descent)
: Run(range),
mPaint(nullptr /* font collection */),
mWidth(width),
mAscent(ascent),
mDescent(descent) {
mLocaleListId = LocaleListCache::getId(lang);
}
virtual bool isRtl() const override { return false; }
virtual bool canBreak() const override { return true; }
virtual bool canHyphenate() const override { return true; }
virtual uint32_t getLocaleListId() const { return mLocaleListId; }
virtual void getMetrics(const U16StringPiece&, std::vector<float>* advances,
std::vector<uint8_t>* /*flags*/, LayoutPieces*,
bool /*boundsCalculation*/, LayoutPieces*) const {
std::fill(advances->begin() + mRange.getStart(), advances->begin() + mRange.getEnd(),
mWidth);
}
virtual std::pair<float, MinikinRect> getBounds(const U16StringPiece& /* text */,
const Range& /* range */,
const LayoutPieces& /* pieces */) const {
return std::make_pair(mWidth, MinikinRect());
}
virtual MinikinExtent getExtent(const U16StringPiece& /* text */, const Range& /* range */,
const LayoutPieces& /* pieces */) const override {
return {mAscent, mDescent};
}
virtual LineMetrics getLineMetrics(const U16StringPiece& text, const Range& range,
const LayoutPieces& pieces) const {
auto [adv, rect] = getBounds(text, range, pieces);
return LineMetrics(getExtent(text, range, pieces), rect, adv);
}
virtual const MinikinPaint* getPaint() const { return &mPaint; }
virtual float measureHyphenPiece(const U16StringPiece&, const Range& range,
StartHyphenEdit start, EndHyphenEdit end,
LayoutPieces*) const {
uint32_t extraCharForHyphen = 0;
if (isInsertion(start)) {
extraCharForHyphen++;
}
if (isInsertion(end)) {
extraCharForHyphen++;
}
return mWidth * (range.getLength() + extraCharForHyphen);
}
virtual void appendLayout(const U16StringPiece&, const Range&, const Range&,
const LayoutPieces&, const MinikinPaint&, uint32_t, StartHyphenEdit,
EndHyphenEdit, Layout*) const {}
virtual float measureText(const U16StringPiece&) const { return 0; }
virtual LineBreakStyle lineBreakStyle() const override { return LineBreakStyle::None; }
virtual LineBreakWordStyle lineBreakWordStyle() const override {
return LineBreakWordStyle::None;
}
private:
MinikinPaint mPaint;
uint32_t mLocaleListId;
float mWidth;
float mAscent;
float mDescent;
};
struct LineBreakExpectation {
std::string mLineContent;
float mWidth;
StartHyphenEdit mStartEdit;
EndHyphenEdit mEndEdit;
float mAscent;
float mDescent;
};
static bool sameLineBreak(const std::vector<LineBreakExpectation>& expected,
const LineBreakResult& actual) {
if (expected.size() != actual.breakPoints.size()) {
return false;
}
uint32_t breakOffset = 0;
for (uint32_t i = 0; i < expected.size(); ++i) {
std::vector<uint16_t> u16Str = utf8ToUtf16(expected[i].mLineContent);
// The expected string contains auto inserted hyphen. Remove it for computing offset.
uint32_t lineLength = u16Str.size();
if (isInsertion(expected[i].mStartEdit)) {
if (u16Str[0] != '-') {
return false;
}
--lineLength;
}
if (isInsertion(expected[i].mEndEdit)) {
if (u16Str.back() != '-') {
return false;
}
--lineLength;
}
breakOffset += lineLength;
if (breakOffset != static_cast<uint32_t>(actual.breakPoints[i])) {
return false;
}
if (expected[i].mWidth != actual.widths[i]) {
return false;
}
HyphenEdit edit = static_cast<HyphenEdit>(actual.flags[i] & 0xFF);
if (expected[i].mStartEdit != startHyphenEdit(edit)) {
return false;
}
if (expected[i].mEndEdit != endHyphenEdit(edit)) {
return false;
}
if (expected[i].mAscent != actual.ascents[i]) {
return false;
}
if (expected[i].mDescent != actual.descents[i]) {
return false;
}
}
return true;
}
// Make debug string.
static std::string toString(const std::vector<LineBreakExpectation>& lines) {
std::string out;
for (uint32_t i = 0; i < lines.size(); ++i) {
const LineBreakExpectation& line = lines[i];
char lineMsg[128] = {};
snprintf(lineMsg, sizeof(lineMsg),
"Line %2d, Width: %5.1f, Hyphen(%hhu, %hhu), Extent(%5.1f, %5.1f), Text: \"%s\"\n",
i, line.mWidth, line.mStartEdit, line.mEndEdit, line.mAscent, line.mDescent,
line.mLineContent.c_str());
out += lineMsg;
}
return out;
}
// Make debug string.
static std::string toString(const U16StringPiece& textBuf, const LineBreakResult& lines) {
std::string out;
for (uint32_t i = 0; i < lines.breakPoints.size(); ++i) {
const Range textRange(i == 0 ? 0 : lines.breakPoints[i - 1], lines.breakPoints[i]);
const HyphenEdit edit = static_cast<HyphenEdit>(lines.flags[i] & 0xFF);
const StartHyphenEdit startEdit = startHyphenEdit(edit);
const EndHyphenEdit endEdit = endHyphenEdit(edit);
std::string hyphenatedStr = utf16ToUtf8(textBuf.substr(textRange));
if (isInsertion(startEdit)) {
hyphenatedStr.insert(0, "-");
}
if (isInsertion(endEdit)) {
hyphenatedStr.push_back('-');
}
char lineMsg[256] = {};
snprintf(lineMsg, sizeof(lineMsg),
"Line %2d, Width: %5.1f, Hyphen(%hhu, %hhu), Extent(%5.1f, %5.1f), Bounds(%f, %f, "
"%f, %f), Text: \"%s\"\n",
i, lines.widths[i], startEdit, endEdit, lines.ascents[i], lines.descents[i],
lines.bounds[i].mLeft, lines.bounds[i].mTop, lines.bounds[i].mRight,
lines.bounds[i].mBottom, hyphenatedStr.c_str());
out += lineMsg;
}
return out;
}
} // namespace line_breaker_test_helper
} // namespace minikin
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