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/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "TestUtil.h"
#include <yoga/YGEnums.h>
#include <yoga/YGNode.h>
#include <yoga/event/event.h>
#include <yoga/node/Node.h>
#include <iostream>
#include <sstream>
#include <string>
#include <string_view>
namespace facebook::yoga::test {
int nodeInstanceCount = 0;
namespace {
void yogaEventSubscriber(
YGNodeConstRef /*node*/,
Event::Type eventType,
const Event::Data& /*eventData*/) {
switch (eventType) {
case Event::NodeAllocation:
nodeInstanceCount++;
break;
case Event::NodeDeallocation:
nodeInstanceCount--;
break;
default:
break;
}
}
} // namespace
void TestUtil::startCountingNodes() {
nodeInstanceCount = 0;
Event::subscribe(yogaEventSubscriber);
}
int TestUtil::nodeCount() {
return nodeInstanceCount;
}
int TestUtil::stopCountingNodes() {
Event::reset();
auto prev = nodeInstanceCount;
nodeInstanceCount = 0;
return prev;
}
ScopedEventSubscription::ScopedEventSubscription(
std::function<Event::Subscriber>&& s) {
Event::subscribe(std::move(s));
}
ScopedEventSubscription::~ScopedEventSubscription() {
Event::reset();
}
YGSize IntrinsicSizeMeasure(
YGNodeConstRef node,
float width,
YGMeasureMode widthMode,
float height,
YGMeasureMode heightMode) {
std::string_view innerText((char*)YGNodeGetContext(node));
float heightPerChar = 10;
float widthPerChar = 10;
float measuredWidth;
float measuredHeight;
if (widthMode == YGMeasureModeExactly) {
measuredWidth = width;
} else if (widthMode == YGMeasureModeAtMost) {
measuredWidth = std::min((float)innerText.size() * widthPerChar, width);
} else {
measuredWidth = (float)innerText.size() * widthPerChar;
}
if (heightMode == YGMeasureModeExactly) {
measuredHeight = height;
} else if (heightMode == YGMeasureModeAtMost) {
measuredHeight = std::min(
calculateHeight(
innerText,
std::max(longestWordWidth(innerText, widthPerChar), measuredWidth),
widthPerChar,
heightPerChar),
height);
} else {
measuredHeight = calculateHeight(
innerText,
std::max(longestWordWidth(innerText, widthPerChar), measuredWidth),
widthPerChar,
heightPerChar);
}
return YGSize{measuredWidth, measuredHeight};
}
float longestWordWidth(std::string_view text, float widthPerChar) {
int maxLength = 0;
int currentLength = 0;
for (auto c : text) {
if (c == ' ') {
maxLength = std::max(currentLength, maxLength);
currentLength = 0;
} else {
currentLength++;
}
}
return (float)std::max(currentLength, maxLength) * widthPerChar;
}
float calculateHeight(
std::string_view text,
float measuredWidth,
float widthPerChar,
float heightPerChar) {
if ((float)text.size() * widthPerChar <= measuredWidth) {
return heightPerChar;
}
std::vector<std::string> words;
std::istringstream iss((std::string)text);
std::string currentWord;
while (getline(iss, currentWord, ' ')) {
words.push_back(currentWord);
}
float lines = 1;
float currentLineLength = 0;
for (const std::string& word : words) {
float wordWidth = (float)word.length() * widthPerChar;
if (wordWidth > measuredWidth) {
if (currentLineLength > 0) {
lines++;
}
lines++;
currentLineLength = 0;
} else if (currentLineLength + wordWidth <= measuredWidth) {
currentLineLength += wordWidth + widthPerChar;
} else {
lines++;
currentLineLength = wordWidth + widthPerChar;
}
}
return (currentLineLength == 0 ? lines - 1 : lines) * heightPerChar;
}
} // namespace facebook::yoga::test
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