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801 lines
27 KiB
C++
801 lines
27 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-11 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online 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.rawmaterialsoftware.com/juce for more information.
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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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void PositionedGlyph::draw (const Graphics& g) const
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{
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if (! isWhitespace())
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{
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LowLevelGraphicsContext* const context = g.getInternalContext();
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context->setFont (font);
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context->drawGlyph (glyph, AffineTransform::translation (x, y));
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}
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}
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void PositionedGlyph::draw (const Graphics& g,
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const AffineTransform& transform) const
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{
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if (! isWhitespace())
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{
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LowLevelGraphicsContext* const context = g.getInternalContext();
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context->setFont (font);
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context->drawGlyph (glyph, AffineTransform::translation (x, y)
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.followedBy (transform));
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}
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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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Typeface* const t = font.getTypeface();
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if (t != nullptr)
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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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Typeface* const t = font.getTypeface();
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if (t != nullptr)
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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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{
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addGlyphArrangement (other);
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}
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GlyphArrangement& GlyphArrangement::operator= (const GlyphArrangement& other)
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{
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if (this != &other)
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{
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clear();
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addGlyphArrangement (other);
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}
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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
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{
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jassert (isPositiveAndBelow (index, glyphs.size()));
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return *glyphs [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.ensureStorageAllocated (glyphs.size() + other.glyphs.size());
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glyphs.addCopiesOf (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 (new PositionedGlyph (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,
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xOffset, yOffset,
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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 thisX = xOffsets.getUnchecked (i);
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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 bool isWhitespace = t.isWhitespace();
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glyphs.add (new 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.getUnchecked (--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++, new 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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const 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.getUnchecked(i)->getCharacter() != '\n'
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&& glyphs.getUnchecked(i)->getCharacter() != '\r')
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++i;
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const float lineMaxX = glyphs.getUnchecked (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.getUnchecked (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.getUnchecked(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.getUnchecked (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.getUnchecked (j)->isWhitespace())
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{
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currentLineEndX = glyphs.getUnchecked (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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const 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))
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dy += (height - bb.getHeight()) * 0.5f;
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else if (layout.testFlags (Justification::bottom))
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dy += height - bb.getHeight();
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ga.moveRangeOfGlyphs (0, -1, 0.0f, dy);
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glyphs.ensureStorageAllocated (glyphs.size() + ga.glyphs.size());
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for (int i = 0; i < ga.glyphs.size(); ++i)
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glyphs.add (ga.glyphs.getUnchecked (i));
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ga.glyphs.clear (false);
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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.getUnchecked (glyphs.size() - 1)->getRight()
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- glyphs.getUnchecked (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.getUnchecked (glyphs.size() - 1)->getRight()
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- glyphs.getUnchecked (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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int lastLineStartIndex = 0;
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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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lastLineStartIndex = i;
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float lineStartX = glyphs.getUnchecked (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.getUnchecked (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.getUnchecked (i)->getRight() - lineStartX) * minimumHorizontalScale < width)
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{
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if (glyphs.getUnchecked (i)->isWhitespace()
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|| glyphs.getUnchecked (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 (5, i - startIndex - 1); ++back)
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{
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if (glyphs.getUnchecked (i - back)->isWhitespace()
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|| glyphs.getUnchecked (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.getUnchecked (wsStart - 1)->isWhitespace())
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--wsStart;
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int wsEnd = i;
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while (wsEnd < glyphs.size() && glyphs.getUnchecked (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,
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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.getUnchecked (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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const Justification& justification, float minimumHorizontalScale)
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{
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int numDeleted = 0;
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const float lineStartX = glyphs.getUnchecked (start)->getLeft();
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float lineWidth = glyphs.getUnchecked (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.getUnchecked (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);
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numGlyphs -= numDeleted;
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}
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}
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justifyGlyphs (start, numGlyphs, x, y, w, h, justification);
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return numDeleted;
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}
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void GlyphArrangement::stretchRangeOfGlyphs (int startIndex, int num,
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const float horizontalScaleFactor)
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{
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jassert (startIndex >= 0);
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if (num < 0 || startIndex + num > glyphs.size())
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num = glyphs.size() - startIndex;
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if (num > 0)
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{
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const float xAnchor = glyphs.getUnchecked (startIndex)->getLeft();
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while (--num >= 0)
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{
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PositionedGlyph* const pg = glyphs.getUnchecked (startIndex++);
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pg->x = xAnchor + (pg->x - xAnchor) * horizontalScaleFactor;
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pg->font.setHorizontalScale (pg->font.getHorizontalScale() * horizontalScaleFactor);
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pg->w *= horizontalScaleFactor;
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}
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}
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}
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Rectangle<float> GlyphArrangement::getBoundingBox (int startIndex, int num, const bool includeWhitespace) const
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{
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jassert (startIndex >= 0);
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if (num < 0 || startIndex + num > glyphs.size())
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num = glyphs.size() - startIndex;
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Rectangle<float> result;
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while (--num >= 0)
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{
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const PositionedGlyph* const pg = glyphs.getUnchecked (startIndex++);
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if (includeWhitespace || ! pg->isWhitespace())
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result = result.getUnion (pg->getBounds());
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}
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return result;
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}
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void GlyphArrangement::justifyGlyphs (const int startIndex, const int num,
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const float x, const float y, const float width, const float height,
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const Justification& justification)
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{
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jassert (num >= 0 && startIndex >= 0);
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|
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if (glyphs.size() > 0 && num > 0)
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{
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const Rectangle<float> bb (getBoundingBox (startIndex, num, ! justification.testFlags (Justification::horizontallyJustified
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| Justification::horizontallyCentred)));
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float deltaX = 0.0f;
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if (justification.testFlags (Justification::horizontallyJustified))
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deltaX = x - bb.getX();
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else if (justification.testFlags (Justification::horizontallyCentred))
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deltaX = x + (width - bb.getWidth()) * 0.5f - bb.getX();
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else if (justification.testFlags (Justification::right))
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deltaX = (x + width) - bb.getRight();
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else
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deltaX = x - bb.getX();
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|
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float deltaY = 0.0f;
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|
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if (justification.testFlags (Justification::top))
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deltaY = y - bb.getY();
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else if (justification.testFlags (Justification::bottom))
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deltaY = (y + height) - bb.getBottom();
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else
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deltaY = y + (height - bb.getHeight()) * 0.5f - bb.getY();
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|
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moveRangeOfGlyphs (startIndex, num, deltaX, deltaY);
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|
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if (justification.testFlags (Justification::horizontallyJustified))
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|
{
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int lineStart = 0;
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float baseY = glyphs.getUnchecked (startIndex)->getBaselineY();
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|
|
|
int i;
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for (i = 0; i < num; ++i)
|
|
{
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const float glyphY = glyphs.getUnchecked (startIndex + i)->getBaselineY();
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|
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if (glyphY != baseY)
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{
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spreadOutLine (startIndex + lineStart, i - lineStart, width);
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|
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lineStart = i;
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baseY = glyphY;
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}
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}
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|
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if (i > lineStart)
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spreadOutLine (startIndex + lineStart, i - lineStart, width);
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}
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}
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}
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|
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void GlyphArrangement::spreadOutLine (const int start, const int num, const float targetWidth)
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|
{
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if (start + num < glyphs.size()
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&& glyphs.getUnchecked (start + num - 1)->getCharacter() != '\r'
|
|
&& glyphs.getUnchecked (start + num - 1)->getCharacter() != '\n')
|
|
{
|
|
int numSpaces = 0;
|
|
int spacesAtEnd = 0;
|
|
|
|
for (int i = 0; i < num; ++i)
|
|
{
|
|
if (glyphs.getUnchecked (start + i)->isWhitespace())
|
|
{
|
|
++spacesAtEnd;
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|
++numSpaces;
|
|
}
|
|
else
|
|
{
|
|
spacesAtEnd = 0;
|
|
}
|
|
}
|
|
|
|
numSpaces -= spacesAtEnd;
|
|
|
|
if (numSpaces > 0)
|
|
{
|
|
const float startX = glyphs.getUnchecked (start)->getLeft();
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|
const float endX = glyphs.getUnchecked (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.getUnchecked (start + i)->moveBy (deltaX, 0.0f);
|
|
|
|
if (glyphs.getUnchecked (start + i)->isWhitespace())
|
|
deltaX += extraPaddingBetweenWords;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//==============================================================================
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|
void GlyphArrangement::draw (const Graphics& g) const
|
|
{
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|
for (int i = 0; i < glyphs.size(); ++i)
|
|
{
|
|
const PositionedGlyph* const pg = glyphs.getUnchecked(i);
|
|
|
|
if (pg->font.isUnderlined())
|
|
{
|
|
const float lineThickness = (pg->font.getDescent()) * 0.3f;
|
|
|
|
float nextX = pg->x + pg->w;
|
|
|
|
if (i < glyphs.size() - 1 && glyphs.getUnchecked (i + 1)->y == pg->y)
|
|
nextX = glyphs.getUnchecked (i + 1)->x;
|
|
|
|
g.fillRect (pg->x, pg->y + lineThickness * 2.0f,
|
|
nextX - pg->x, lineThickness);
|
|
}
|
|
|
|
pg->draw (g);
|
|
}
|
|
}
|
|
|
|
void GlyphArrangement::draw (const Graphics& g, const AffineTransform& transform) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
{
|
|
const PositionedGlyph* const pg = glyphs.getUnchecked(i);
|
|
|
|
if (pg->font.isUnderlined())
|
|
{
|
|
const float lineThickness = (pg->font.getDescent()) * 0.3f;
|
|
|
|
float nextX = pg->x + pg->w;
|
|
|
|
if (i < glyphs.size() - 1 && glyphs.getUnchecked (i + 1)->y == pg->y)
|
|
nextX = glyphs.getUnchecked (i + 1)->x;
|
|
|
|
Path p;
|
|
p.addLineSegment (Line<float> (pg->x, pg->y + lineThickness * 2.0f,
|
|
nextX, pg->y + lineThickness * 2.0f),
|
|
lineThickness);
|
|
|
|
g.fillPath (p, transform);
|
|
}
|
|
|
|
pg->draw (g, transform);
|
|
}
|
|
}
|
|
|
|
void GlyphArrangement::createPath (Path& path) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
glyphs.getUnchecked (i)->createPath (path);
|
|
}
|
|
|
|
int GlyphArrangement::findGlyphIndexAt (float x, float y) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
if (glyphs.getUnchecked (i)->hitTest (x, y))
|
|
return i;
|
|
|
|
return -1;
|
|
}
|