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760 lines
26 KiB
760 lines
26 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software 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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PositionedGlyph::PositionedGlyph() noexcept
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: character (0), glyph (0), x (0), y (0), w (0), whitespace (false)
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{
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}
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PositionedGlyph::PositionedGlyph (const Font& font_, const juce_wchar character_, const int glyph_,
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const float x_, const float y_, const float w_, const bool whitespace_)
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: font (font_), character (character_), glyph (glyph_),
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x (x_), y (y_), w (w_), whitespace (whitespace_)
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{
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}
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PositionedGlyph::PositionedGlyph (const PositionedGlyph& other)
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: font (other.font), character (other.character), glyph (other.glyph),
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x (other.x), y (other.y), w (other.w), whitespace (other.whitespace)
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{
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}
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PositionedGlyph::~PositionedGlyph() {}
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PositionedGlyph& PositionedGlyph::operator= (const PositionedGlyph& other)
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{
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font = other.font;
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character = other.character;
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glyph = other.glyph;
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x = other.x;
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y = other.y;
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w = other.w;
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whitespace = other.whitespace;
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return *this;
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}
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static inline void drawGlyphWithFont (const Graphics& g, int glyph, const Font& font, const AffineTransform& t)
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{
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LowLevelGraphicsContext& context = g.getInternalContext();
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context.setFont (font);
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context.drawGlyph (glyph, t);
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}
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void PositionedGlyph::draw (const Graphics& g) const
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{
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if (! isWhitespace())
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drawGlyphWithFont (g, glyph, font, AffineTransform::translation (x, y));
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}
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void PositionedGlyph::draw (const Graphics& g, const AffineTransform& transform) const
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{
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if (! isWhitespace())
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drawGlyphWithFont (g, glyph, font, AffineTransform::translation (x, y).followedBy (transform));
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}
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void PositionedGlyph::createPath (Path& path) const
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{
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if (! isWhitespace())
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{
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if (Typeface* const t = font.getTypeface())
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{
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Path p;
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t->getOutlineForGlyph (glyph, p);
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path.addPath (p, AffineTransform::scale (font.getHeight() * font.getHorizontalScale(), font.getHeight())
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.translated (x, y));
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}
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}
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}
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bool PositionedGlyph::hitTest (float px, float py) const
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{
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if (getBounds().contains (px, py) && ! isWhitespace())
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{
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if (Typeface* const t = font.getTypeface())
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{
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Path p;
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t->getOutlineForGlyph (glyph, p);
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AffineTransform::translation (-x, -y)
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.scaled (1.0f / (font.getHeight() * font.getHorizontalScale()), 1.0f / font.getHeight())
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.transformPoint (px, py);
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return p.contains (px, py);
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}
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}
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return false;
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}
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void PositionedGlyph::moveBy (const float deltaX,
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const float deltaY)
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{
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x += deltaX;
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y += deltaY;
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}
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//==============================================================================
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GlyphArrangement::GlyphArrangement()
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{
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glyphs.ensureStorageAllocated (128);
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}
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GlyphArrangement::GlyphArrangement (const GlyphArrangement& other)
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: glyphs (other.glyphs)
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{
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}
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GlyphArrangement& GlyphArrangement::operator= (const GlyphArrangement& other)
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{
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glyphs = other.glyphs;
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return *this;
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}
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GlyphArrangement::~GlyphArrangement()
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{
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}
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//==============================================================================
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void GlyphArrangement::clear()
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{
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glyphs.clear();
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}
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PositionedGlyph& GlyphArrangement::getGlyph (const int index) const noexcept
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{
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return glyphs.getReference (index);
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}
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//==============================================================================
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void GlyphArrangement::addGlyphArrangement (const GlyphArrangement& other)
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{
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glyphs.addArray (other.glyphs);
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}
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void GlyphArrangement::addGlyph (const PositionedGlyph& glyph)
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{
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glyphs.add (glyph);
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}
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void GlyphArrangement::removeRangeOfGlyphs (int startIndex, const int num)
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{
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glyphs.removeRange (startIndex, num < 0 ? glyphs.size() : num);
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}
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//==============================================================================
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void GlyphArrangement::addLineOfText (const Font& font,
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const String& text,
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const float xOffset,
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const float yOffset)
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{
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addCurtailedLineOfText (font, text, xOffset, yOffset, 1.0e10f, false);
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}
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void GlyphArrangement::addCurtailedLineOfText (const Font& font,
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const String& text,
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const float xOffset,
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const float yOffset,
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const float maxWidthPixels,
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const bool useEllipsis)
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{
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if (text.isNotEmpty())
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{
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Array <int> newGlyphs;
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Array <float> xOffsets;
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font.getGlyphPositions (text, newGlyphs, xOffsets);
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const int textLen = newGlyphs.size();
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glyphs.ensureStorageAllocated (glyphs.size() + textLen);
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String::CharPointerType t (text.getCharPointer());
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for (int i = 0; i < textLen; ++i)
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{
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const float nextX = xOffsets.getUnchecked (i + 1);
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if (nextX > maxWidthPixels + 1.0f)
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{
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// curtail the string if it's too wide..
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if (useEllipsis && textLen > 3 && glyphs.size() >= 3)
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insertEllipsis (font, xOffset + maxWidthPixels, 0, glyphs.size());
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break;
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}
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else
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{
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const float thisX = xOffsets.getUnchecked (i);
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const bool isWhitespace = t.isWhitespace();
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glyphs.add (PositionedGlyph (font, t.getAndAdvance(),
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newGlyphs.getUnchecked(i),
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xOffset + thisX, yOffset,
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nextX - thisX, isWhitespace));
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}
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}
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}
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}
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int GlyphArrangement::insertEllipsis (const Font& font, const float maxXPos,
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const int startIndex, int endIndex)
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{
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int numDeleted = 0;
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if (glyphs.size() > 0)
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{
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Array<int> dotGlyphs;
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Array<float> dotXs;
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font.getGlyphPositions ("..", dotGlyphs, dotXs);
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const float dx = dotXs[1];
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float xOffset = 0.0f, yOffset = 0.0f;
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while (endIndex > startIndex)
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{
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const PositionedGlyph& pg = glyphs.getReference (--endIndex);
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xOffset = pg.x;
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yOffset = pg.y;
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glyphs.remove (endIndex);
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++numDeleted;
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if (xOffset + dx * 3 <= maxXPos)
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break;
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}
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for (int i = 3; --i >= 0;)
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{
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glyphs.insert (endIndex++, PositionedGlyph (font, '.', dotGlyphs.getFirst(),
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xOffset, yOffset, dx, false));
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--numDeleted;
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xOffset += dx;
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if (xOffset > maxXPos)
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break;
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}
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}
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return numDeleted;
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}
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void GlyphArrangement::addJustifiedText (const Font& font,
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const String& text,
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float x, float y,
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const float maxLineWidth,
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Justification horizontalLayout)
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{
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int lineStartIndex = glyphs.size();
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addLineOfText (font, text, x, y);
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const float originalY = y;
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while (lineStartIndex < glyphs.size())
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{
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int i = lineStartIndex;
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if (glyphs.getReference(i).getCharacter() != '\n'
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&& glyphs.getReference(i).getCharacter() != '\r')
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++i;
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const float lineMaxX = glyphs.getReference (lineStartIndex).getLeft() + maxLineWidth;
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int lastWordBreakIndex = -1;
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while (i < glyphs.size())
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{
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const PositionedGlyph& pg = glyphs.getReference (i);
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const juce_wchar c = pg.getCharacter();
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if (c == '\r' || c == '\n')
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{
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++i;
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if (c == '\r' && i < glyphs.size()
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&& glyphs.getReference(i).getCharacter() == '\n')
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++i;
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break;
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}
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else if (pg.isWhitespace())
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{
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lastWordBreakIndex = i + 1;
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}
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else if (pg.getRight() - 0.0001f >= lineMaxX)
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{
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if (lastWordBreakIndex >= 0)
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i = lastWordBreakIndex;
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break;
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}
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++i;
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}
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const float currentLineStartX = glyphs.getReference (lineStartIndex).getLeft();
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float currentLineEndX = currentLineStartX;
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for (int j = i; --j >= lineStartIndex;)
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{
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if (! glyphs.getReference (j).isWhitespace())
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{
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currentLineEndX = glyphs.getReference (j).getRight();
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break;
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}
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}
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float deltaX = 0.0f;
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if (horizontalLayout.testFlags (Justification::horizontallyJustified))
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spreadOutLine (lineStartIndex, i - lineStartIndex, maxLineWidth);
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else if (horizontalLayout.testFlags (Justification::horizontallyCentred))
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deltaX = (maxLineWidth - (currentLineEndX - currentLineStartX)) * 0.5f;
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else if (horizontalLayout.testFlags (Justification::right))
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deltaX = maxLineWidth - (currentLineEndX - currentLineStartX);
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moveRangeOfGlyphs (lineStartIndex, i - lineStartIndex,
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x + deltaX - currentLineStartX, y - originalY);
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lineStartIndex = i;
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y += font.getHeight();
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}
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}
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void GlyphArrangement::addFittedText (const Font& f,
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const String& text,
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const float x, const float y,
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const float width, const float height,
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Justification layout,
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int maximumLines,
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const float minimumHorizontalScale)
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{
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// doesn't make much sense if this is outside a sensible range of 0.5 to 1.0
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jassert (minimumHorizontalScale > 0 && minimumHorizontalScale <= 1.0f);
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if (text.containsAnyOf ("\r\n"))
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{
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GlyphArrangement ga;
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ga.addJustifiedText (f, text, x, y, width, layout);
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const Rectangle<float> bb (ga.getBoundingBox (0, -1, false));
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float dy = y - bb.getY();
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if (layout.testFlags (Justification::verticallyCentred)) dy += (height - bb.getHeight()) * 0.5f;
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else if (layout.testFlags (Justification::bottom)) dy += (height - bb.getHeight());
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ga.moveRangeOfGlyphs (0, -1, 0.0f, dy);
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glyphs.addArray (ga.glyphs);
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return;
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}
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int startIndex = glyphs.size();
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addLineOfText (f, text.trim(), x, y);
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if (glyphs.size() > startIndex)
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{
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float lineWidth = glyphs.getReference (glyphs.size() - 1).getRight()
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- glyphs.getReference (startIndex).getLeft();
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if (lineWidth <= 0)
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return;
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if (lineWidth * minimumHorizontalScale < width)
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{
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if (lineWidth > width)
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stretchRangeOfGlyphs (startIndex, glyphs.size() - startIndex,
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width / lineWidth);
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justifyGlyphs (startIndex, glyphs.size() - startIndex,
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x, y, width, height, layout);
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}
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else if (maximumLines <= 1)
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{
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fitLineIntoSpace (startIndex, glyphs.size() - startIndex,
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x, y, width, height, f, layout, minimumHorizontalScale);
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}
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else
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{
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Font font (f);
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String txt (text.trim());
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const int length = txt.length();
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const int originalStartIndex = startIndex;
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int numLines = 1;
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if (length <= 12 && ! txt.containsAnyOf (" -\t\r\n"))
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maximumLines = 1;
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maximumLines = jmin (maximumLines, length);
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while (numLines < maximumLines)
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{
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++numLines;
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const float newFontHeight = height / (float) numLines;
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if (newFontHeight < font.getHeight())
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{
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font.setHeight (jmax (8.0f, newFontHeight));
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removeRangeOfGlyphs (startIndex, -1);
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addLineOfText (font, txt, x, y);
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lineWidth = glyphs.getReference (glyphs.size() - 1).getRight()
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- glyphs.getReference (startIndex).getLeft();
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}
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if (numLines > lineWidth / width || newFontHeight < 8.0f)
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break;
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}
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if (numLines < 1)
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numLines = 1;
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float lineY = y;
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float widthPerLine = lineWidth / numLines;
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for (int line = 0; line < numLines; ++line)
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{
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int i = startIndex;
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float lineStartX = glyphs.getReference (startIndex).getLeft();
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if (line == numLines - 1)
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{
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widthPerLine = width;
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i = glyphs.size();
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}
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else
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{
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while (i < glyphs.size())
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{
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lineWidth = (glyphs.getReference (i).getRight() - lineStartX);
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if (lineWidth > widthPerLine)
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{
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// got to a point where the line's too long, so skip forward to find a
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// good place to break it..
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const int searchStartIndex = i;
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while (i < glyphs.size())
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{
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if ((glyphs.getReference (i).getRight() - lineStartX) * minimumHorizontalScale < width)
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{
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if (glyphs.getReference (i).isWhitespace()
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|| glyphs.getReference (i).getCharacter() == '-')
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{
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++i;
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break;
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}
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}
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else
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{
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// can't find a suitable break, so try looking backwards..
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i = searchStartIndex;
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for (int back = 1; back < jmin (7, i - startIndex - 1); ++back)
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{
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if (glyphs.getReference (i - back).isWhitespace()
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|| glyphs.getReference (i - back).getCharacter() == '-')
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{
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i -= back - 1;
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break;
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}
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}
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break;
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}
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++i;
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}
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break;
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}
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++i;
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}
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int wsStart = i;
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while (wsStart > 0 && glyphs.getReference (wsStart - 1).isWhitespace())
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--wsStart;
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int wsEnd = i;
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while (wsEnd < glyphs.size() && glyphs.getReference (wsEnd).isWhitespace())
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++wsEnd;
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removeRangeOfGlyphs (wsStart, wsEnd - wsStart);
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i = jmax (wsStart, startIndex + 1);
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}
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i -= fitLineIntoSpace (startIndex, i - startIndex,
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x, lineY, width, font.getHeight(), font,
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layout.getOnlyHorizontalFlags() | Justification::verticallyCentred,
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minimumHorizontalScale);
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startIndex = i;
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lineY += font.getHeight();
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if (startIndex >= glyphs.size())
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break;
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}
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justifyGlyphs (originalStartIndex, glyphs.size() - originalStartIndex,
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x, y, width, height, layout.getFlags() & ~Justification::horizontallyJustified);
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}
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}
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}
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//==============================================================================
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void GlyphArrangement::moveRangeOfGlyphs (int startIndex, int num, const float dx, const float dy)
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{
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jassert (startIndex >= 0);
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if (dx != 0.0f || dy != 0.0f)
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{
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if (num < 0 || startIndex + num > glyphs.size())
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num = glyphs.size() - startIndex;
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while (--num >= 0)
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glyphs.getReference (startIndex++).moveBy (dx, dy);
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}
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}
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int GlyphArrangement::fitLineIntoSpace (int start, int numGlyphs, float x, float y, float w, float h, const Font& font,
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Justification justification, float minimumHorizontalScale)
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{
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int numDeleted = 0;
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const float lineStartX = glyphs.getReference (start).getLeft();
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float lineWidth = glyphs.getReference (start + numGlyphs - 1).getRight() - lineStartX;
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if (lineWidth > w)
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{
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if (minimumHorizontalScale < 1.0f)
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{
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stretchRangeOfGlyphs (start, numGlyphs, jmax (minimumHorizontalScale, w / lineWidth));
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lineWidth = glyphs.getReference (start + numGlyphs - 1).getRight() - lineStartX - 0.5f;
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}
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if (lineWidth > w)
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{
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numDeleted = insertEllipsis (font, lineStartX + w, start, start + numGlyphs);
|
|
numGlyphs -= numDeleted;
|
|
}
|
|
}
|
|
|
|
justifyGlyphs (start, numGlyphs, x, y, w, h, justification);
|
|
return numDeleted;
|
|
}
|
|
|
|
void GlyphArrangement::stretchRangeOfGlyphs (int startIndex, int num,
|
|
const float horizontalScaleFactor)
|
|
{
|
|
jassert (startIndex >= 0);
|
|
|
|
if (num < 0 || startIndex + num > glyphs.size())
|
|
num = glyphs.size() - startIndex;
|
|
|
|
if (num > 0)
|
|
{
|
|
const float xAnchor = glyphs.getReference (startIndex).getLeft();
|
|
|
|
while (--num >= 0)
|
|
{
|
|
PositionedGlyph& pg = glyphs.getReference (startIndex++);
|
|
|
|
pg.x = xAnchor + (pg.x - xAnchor) * horizontalScaleFactor;
|
|
pg.font.setHorizontalScale (pg.font.getHorizontalScale() * horizontalScaleFactor);
|
|
pg.w *= horizontalScaleFactor;
|
|
}
|
|
}
|
|
}
|
|
|
|
Rectangle<float> GlyphArrangement::getBoundingBox (int startIndex, int num, const bool includeWhitespace) const
|
|
{
|
|
jassert (startIndex >= 0);
|
|
|
|
if (num < 0 || startIndex + num > glyphs.size())
|
|
num = glyphs.size() - startIndex;
|
|
|
|
Rectangle<float> result;
|
|
|
|
while (--num >= 0)
|
|
{
|
|
const PositionedGlyph& pg = glyphs.getReference (startIndex++);
|
|
|
|
if (includeWhitespace || ! pg.isWhitespace())
|
|
result = result.getUnion (pg.getBounds());
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void GlyphArrangement::justifyGlyphs (const int startIndex, const int num,
|
|
const float x, const float y, const float width, const float height,
|
|
Justification justification)
|
|
{
|
|
jassert (num >= 0 && startIndex >= 0);
|
|
|
|
if (glyphs.size() > 0 && num > 0)
|
|
{
|
|
const Rectangle<float> bb (getBoundingBox (startIndex, num, ! justification.testFlags (Justification::horizontallyJustified
|
|
| Justification::horizontallyCentred)));
|
|
float deltaX = 0.0f, deltaY = 0.0f;
|
|
|
|
if (justification.testFlags (Justification::horizontallyJustified)) deltaX = x - bb.getX();
|
|
else if (justification.testFlags (Justification::horizontallyCentred)) deltaX = x + (width - bb.getWidth()) * 0.5f - bb.getX();
|
|
else if (justification.testFlags (Justification::right)) deltaX = x + width - bb.getRight();
|
|
else deltaX = x - bb.getX();
|
|
|
|
if (justification.testFlags (Justification::top)) deltaY = y - bb.getY();
|
|
else if (justification.testFlags (Justification::bottom)) deltaY = y + height - bb.getBottom();
|
|
else deltaY = y + (height - bb.getHeight()) * 0.5f - bb.getY();
|
|
|
|
moveRangeOfGlyphs (startIndex, num, deltaX, deltaY);
|
|
|
|
if (justification.testFlags (Justification::horizontallyJustified))
|
|
{
|
|
int lineStart = 0;
|
|
float baseY = glyphs.getReference (startIndex).getBaselineY();
|
|
|
|
int i;
|
|
for (i = 0; i < num; ++i)
|
|
{
|
|
const float glyphY = glyphs.getReference (startIndex + i).getBaselineY();
|
|
|
|
if (glyphY != baseY)
|
|
{
|
|
spreadOutLine (startIndex + lineStart, i - lineStart, width);
|
|
|
|
lineStart = i;
|
|
baseY = glyphY;
|
|
}
|
|
}
|
|
|
|
if (i > lineStart)
|
|
spreadOutLine (startIndex + lineStart, i - lineStart, width);
|
|
}
|
|
}
|
|
}
|
|
|
|
void GlyphArrangement::spreadOutLine (const int start, const int num, const float targetWidth)
|
|
{
|
|
if (start + num < glyphs.size()
|
|
&& glyphs.getReference (start + num - 1).getCharacter() != '\r'
|
|
&& glyphs.getReference (start + num - 1).getCharacter() != '\n')
|
|
{
|
|
int numSpaces = 0;
|
|
int spacesAtEnd = 0;
|
|
|
|
for (int i = 0; i < num; ++i)
|
|
{
|
|
if (glyphs.getReference (start + i).isWhitespace())
|
|
{
|
|
++spacesAtEnd;
|
|
++numSpaces;
|
|
}
|
|
else
|
|
{
|
|
spacesAtEnd = 0;
|
|
}
|
|
}
|
|
|
|
numSpaces -= spacesAtEnd;
|
|
|
|
if (numSpaces > 0)
|
|
{
|
|
const float startX = glyphs.getReference (start).getLeft();
|
|
const float endX = glyphs.getReference (start + num - 1 - spacesAtEnd).getRight();
|
|
|
|
const float extraPaddingBetweenWords
|
|
= (targetWidth - (endX - startX)) / (float) numSpaces;
|
|
|
|
float deltaX = 0.0f;
|
|
|
|
for (int i = 0; i < num; ++i)
|
|
{
|
|
glyphs.getReference (start + i).moveBy (deltaX, 0.0f);
|
|
|
|
if (glyphs.getReference (start + i).isWhitespace())
|
|
deltaX += extraPaddingBetweenWords;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
inline void GlyphArrangement::drawGlyphUnderline (const Graphics& g, const PositionedGlyph& pg,
|
|
const int i, const AffineTransform& transform) const
|
|
{
|
|
const float lineThickness = (pg.font.getDescent()) * 0.3f;
|
|
|
|
float nextX = pg.x + pg.w;
|
|
|
|
if (i < glyphs.size() - 1 && glyphs.getReference (i + 1).y == pg.y)
|
|
nextX = glyphs.getReference (i + 1).x;
|
|
|
|
Path p;
|
|
p.addRectangle (pg.x, pg.y + lineThickness * 2.0f, nextX - pg.x, lineThickness);
|
|
g.fillPath (p, transform);
|
|
}
|
|
|
|
void GlyphArrangement::draw (const Graphics& g) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
{
|
|
const PositionedGlyph& pg = glyphs.getReference(i);
|
|
|
|
if (pg.font.isUnderlined())
|
|
drawGlyphUnderline (g, pg, i, AffineTransform::identity);
|
|
|
|
pg.draw (g);
|
|
}
|
|
}
|
|
|
|
void GlyphArrangement::draw (const Graphics& g, const AffineTransform& transform) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
{
|
|
const PositionedGlyph& pg = glyphs.getReference(i);
|
|
|
|
if (pg.font.isUnderlined())
|
|
drawGlyphUnderline (g, pg, i, transform);
|
|
|
|
pg.draw (g, transform);
|
|
}
|
|
}
|
|
|
|
void GlyphArrangement::createPath (Path& path) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
glyphs.getReference (i).createPath (path);
|
|
}
|
|
|
|
int GlyphArrangement::findGlyphIndexAt (const float x, const float y) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
if (glyphs.getReference (i).hitTest (x, y))
|
|
return i;
|
|
|
|
return -1;
|
|
}
|
|
|