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TypefaceCache: Refactor to make more concise

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reuk 2024-03-19 16:54:05 +00:00
parent 9c1c61a06e
commit d406d51ad0
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1 changed files with 38 additions and 34 deletions
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72
modules/juce_graphics/fonts/juce_Font.cpp
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@ -92,21 +92,19 @@ public:
Typeface::Ptr findTypefaceFor (const Font& font)
{
const auto faceName = font.getTypefaceName();
const auto faceStyle = font.getTypefaceStyle();
const Key key { font.getTypefaceName(), font.getTypefaceStyle() };
jassert (faceName.isNotEmpty());
jassert (key.name.isNotEmpty());
{
const ScopedReadLock slr (lock);
for (int i = faces.size(); --i >= 0;)
{
CachedFace& face = faces.getReference (i);
const auto range = makeRange (std::make_reverse_iterator (faces.end()),
std::make_reverse_iterator (faces.begin()));
if (face.typefaceName == faceName
&& face.typefaceStyle == faceStyle
&& face.typeface != nullptr)
for (auto& face : range)
{
if (face.key == key && face.typeface != nullptr)
{
face.lastUsageCount = ++counter;
return face.typeface;
@ -115,33 +113,25 @@ public:
}
const ScopedWriteLock slw (lock);
int replaceIndex = 0;
auto bestLastUsageCount = std::numeric_limits<size_t>::max();
for (int i = faces.size(); --i >= 0;)
{
auto lu = faces.getReference (i).lastUsageCount;
const auto replaceIter = std::min_element (faces.begin(),
faces.end(),
[] (const auto& a, const auto& b)
{
return a.lastUsageCount < b.lastUsageCount;
});
if (bestLastUsageCount > lu)
{
bestLastUsageCount = lu;
replaceIndex = i;
}
}
auto& face = faces.getReference (replaceIndex);
face.typefaceName = faceName;
face.typefaceStyle = faceStyle;
face.lastUsageCount = ++counter;
if (juce_getTypefaceForFont == nullptr)
face.typeface = Font::getDefaultTypefaceForFont (font);
else
face.typeface = juce_getTypefaceForFont (font);
jassert (replaceIter != faces.end());
auto& face = *replaceIter;
face = CachedFace { key,
++counter,
juce_getTypefaceForFont != nullptr
? juce_getTypefaceForFont (font)
: Font::getDefaultTypefaceForFont (font) };
jassert (face.typeface != nullptr); // the look and feel must return a typeface!
if (defaultFace == nullptr && font == Font())
if (defaultFace == nullptr && key == Key{})
defaultFace = face.typeface;
return face.typeface;
@ -154,15 +144,29 @@ public:
}
private:
struct Key
{
String name = Font::getDefaultSansSerifFontName(), style = Font::getDefaultStyle();
bool operator== (const Key& other) const
{
const auto tie = [] (const auto& x) { return std::tie (x.name, x.style); };
return tie (*this) == tie (other);
}
bool operator!= (const Key& other) const
{
return ! operator== (other);
}
};
struct CachedFace
{
CachedFace() noexcept {}
// Although it seems a bit wacky to store the name here, it's because it may be a
// placeholder rather than a real one, e.g. "<Sans-Serif>" vs the actual typeface name.
// Since the typeface itself doesn't know that it may have this alias, the name under
// which it was fetched needs to be stored separately.
String typefaceName, typefaceStyle;
Key key;
size_t lastUsageCount = 0;
Typeface::Ptr typeface;
};