mirror of
https://github.com/juce-framework/JUCE.git
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353 lines
11 KiB
C++
353 lines
11 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2015 - ROLI Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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namespace
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{
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int getLength (const Array<AttributedString::Attribute>& atts) noexcept
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{
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return atts.size() != 0 ? atts.getReference (atts.size() - 1).range.getEnd() : 0;
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}
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void splitAttributeRanges (Array<AttributedString::Attribute>& atts, int position)
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{
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for (int i = atts.size(); --i >= 0;)
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{
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const AttributedString::Attribute& att = atts.getReference (i);
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const int offset = position - att.range.getStart();
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if (offset >= 0)
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{
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if (offset > 0 && position < att.range.getEnd())
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{
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atts.insert (i + 1, att);
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atts.getReference (i).range.setEnd (position);
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atts.getReference (i + 1).range.setStart (position);
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}
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break;
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}
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}
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}
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Range<int> splitAttributeRanges (Array<AttributedString::Attribute>& atts, Range<int> newRange)
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{
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newRange = newRange.getIntersectionWith (Range<int> (0, getLength (atts)));
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if (! newRange.isEmpty())
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{
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splitAttributeRanges (atts, newRange.getStart());
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splitAttributeRanges (atts, newRange.getEnd());
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}
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return newRange;
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}
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void mergeAdjacentRanges (Array<AttributedString::Attribute>& atts)
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{
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for (int i = atts.size() - 1; --i >= 0;)
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{
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AttributedString::Attribute& a1 = atts.getReference (i);
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AttributedString::Attribute& a2 = atts.getReference (i + 1);
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if (a1.colour == a2.colour && a1.font == a2.font)
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{
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a1.range.setEnd (a2.range.getEnd());
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atts.remove (i + 1);
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if (i < atts.size() - 1)
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++i;
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}
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}
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}
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void appendRange (Array<AttributedString::Attribute>& atts,
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int length, const Font* f, const Colour* c)
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{
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if (atts.size() == 0)
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{
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atts.add (AttributedString::Attribute (Range<int> (0, length),
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f != nullptr ? *f : Font(),
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c != nullptr ? *c : Colour (0xff000000)));
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}
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else
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{
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const int start = getLength (atts);
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atts.add (AttributedString::Attribute (Range<int> (start, start + length),
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f != nullptr ? *f : atts.getReference (atts.size() - 1).font,
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c != nullptr ? *c : atts.getReference (atts.size() - 1).colour));
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mergeAdjacentRanges (atts);
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}
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}
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void applyFontAndColour (Array<AttributedString::Attribute>& atts,
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Range<int> range, const Font* f, const Colour* c)
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{
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range = splitAttributeRanges (atts, range);
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for (int i = 0; i < atts.size(); ++i)
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{
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AttributedString::Attribute& att = atts.getReference (i);
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if (range.getStart() < att.range.getEnd())
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{
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if (range.getEnd() <= att.range.getStart())
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break;
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if (c != nullptr) att.colour = *c;
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if (f != nullptr) att.font = *f;
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}
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}
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mergeAdjacentRanges (atts);
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}
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void truncate (Array<AttributedString::Attribute>& atts, int newLength)
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{
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splitAttributeRanges (atts, newLength);
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for (int i = atts.size(); --i >= 0;)
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if (atts.getReference (i).range.getStart() >= newLength)
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atts.remove (i);
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}
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}
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//==============================================================================
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AttributedString::Attribute::Attribute() noexcept : colour (0xff000000) {}
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AttributedString::Attribute::~Attribute() noexcept {}
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#if JUCE_COMPILER_SUPPORTS_MOVE_SEMANTICS
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AttributedString::Attribute::Attribute (Attribute&& other) noexcept
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: range (other.range),
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font (static_cast<Font&&> (other.font)),
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colour (other.colour)
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{
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}
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AttributedString::Attribute& AttributedString::Attribute::operator= (Attribute&& other) noexcept
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{
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range = other.range;
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font = static_cast<Font&&> (other.font);
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colour = other.colour;
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return *this;
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}
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#endif
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AttributedString::Attribute::Attribute (const Attribute& other) noexcept
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: range (other.range),
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font (other.font),
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colour (other.colour)
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{
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}
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AttributedString::Attribute& AttributedString::Attribute::operator= (const Attribute& other) noexcept
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{
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range = other.range;
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font = other.font;
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colour = other.colour;
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return *this;
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}
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AttributedString::Attribute::Attribute (Range<int> r, const Font& f, Colour c) noexcept
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: range (r), font (f), colour (c)
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{
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}
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//==============================================================================
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AttributedString::AttributedString()
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: lineSpacing (0.0f),
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justification (Justification::left),
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wordWrap (AttributedString::byWord),
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readingDirection (AttributedString::natural)
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{
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}
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AttributedString::AttributedString (const String& newString)
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: lineSpacing (0.0f),
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justification (Justification::left),
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wordWrap (AttributedString::byWord),
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readingDirection (AttributedString::natural)
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{
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setText (newString);
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}
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AttributedString::AttributedString (const AttributedString& other)
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: text (other.text),
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lineSpacing (other.lineSpacing),
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justification (other.justification),
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wordWrap (other.wordWrap),
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readingDirection (other.readingDirection),
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attributes (other.attributes)
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{
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}
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AttributedString& AttributedString::operator= (const AttributedString& other)
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{
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if (this != &other)
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{
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text = other.text;
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lineSpacing = other.lineSpacing;
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justification = other.justification;
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wordWrap = other.wordWrap;
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readingDirection = other.readingDirection;
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attributes = other.attributes;
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}
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return *this;
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}
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#if JUCE_COMPILER_SUPPORTS_MOVE_SEMANTICS
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AttributedString::AttributedString (AttributedString&& other) noexcept
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: text (static_cast<String&&> (other.text)),
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lineSpacing (other.lineSpacing),
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justification (other.justification),
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wordWrap (other.wordWrap),
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readingDirection (other.readingDirection),
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attributes (static_cast<Array<Attribute>&&> (other.attributes))
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{
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}
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AttributedString& AttributedString::operator= (AttributedString&& other) noexcept
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{
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text = static_cast<String&&> (other.text);
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lineSpacing = other.lineSpacing;
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justification = other.justification;
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wordWrap = other.wordWrap;
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readingDirection = other.readingDirection;
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attributes = static_cast<Array<Attribute>&&> (other.attributes);
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return *this;
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}
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#endif
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AttributedString::~AttributedString() noexcept {}
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void AttributedString::setText (const String& newText)
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{
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const int newLength = newText.length();
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const int oldLength = getLength (attributes);
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if (newLength > oldLength)
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appendRange (attributes, newLength - oldLength, nullptr, nullptr);
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else if (newLength < oldLength)
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truncate (attributes, newLength);
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text = newText;
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}
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void AttributedString::append (const String& textToAppend)
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{
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text += textToAppend;
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appendRange (attributes, textToAppend.length(), nullptr, nullptr);
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}
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void AttributedString::append (const String& textToAppend, const Font& font)
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{
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text += textToAppend;
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appendRange (attributes, textToAppend.length(), &font, nullptr);
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}
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void AttributedString::append (const String& textToAppend, Colour colour)
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{
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text += textToAppend;
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appendRange (attributes, textToAppend.length(), nullptr, &colour);
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}
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void AttributedString::append (const String& textToAppend, const Font& font, Colour colour)
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{
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text += textToAppend;
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appendRange (attributes, textToAppend.length(), &font, &colour);
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}
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void AttributedString::append (const AttributedString& other)
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{
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const int originalLength = getLength (attributes);
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const int originalNumAtts = attributes.size();
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text += other.text;
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attributes.addArray (other.attributes);
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for (int i = originalNumAtts; i < attributes.size(); ++i)
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attributes.getReference (i).range += originalLength;
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mergeAdjacentRanges (attributes);
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}
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void AttributedString::clear()
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{
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text.clear();
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attributes.clear();
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}
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void AttributedString::setJustification (Justification newJustification) noexcept
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{
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justification = newJustification;
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}
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void AttributedString::setWordWrap (WordWrap newWordWrap) noexcept
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{
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wordWrap = newWordWrap;
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}
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void AttributedString::setReadingDirection (ReadingDirection newReadingDirection) noexcept
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{
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readingDirection = newReadingDirection;
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}
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void AttributedString::setLineSpacing (const float newLineSpacing) noexcept
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{
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lineSpacing = newLineSpacing;
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}
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void AttributedString::setColour (Range<int> range, Colour colour)
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{
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applyFontAndColour (attributes, range, nullptr, &colour);
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}
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void AttributedString::setFont (Range<int> range, const Font& font)
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{
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applyFontAndColour (attributes, range, &font, nullptr);
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}
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void AttributedString::setColour (Colour colour)
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{
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setColour (Range<int> (0, getLength (attributes)), colour);
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}
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void AttributedString::setFont (const Font& font)
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{
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setFont (Range<int> (0, getLength (attributes)), font);
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}
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void AttributedString::draw (Graphics& g, const Rectangle<float>& area) const
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{
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if (text.isNotEmpty() && g.clipRegionIntersects (area.getSmallestIntegerContainer()))
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{
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jassert (text.length() == getLength (attributes));
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if (! g.getInternalContext().drawTextLayout (*this, area))
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{
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TextLayout layout;
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layout.createLayout (*this, area.getWidth());
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layout.draw (g, area);
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}
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}
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}
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