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780 lines
26 KiB
C++
780 lines
26 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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static constexpr bool isNonBreakingSpace (const juce_wchar c)
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{
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return c == 0x00a0
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|| c == 0x2007
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|| c == 0x202f
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|| c == 0x2060;
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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_, juce_wchar character_, int glyphNumber,
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float anchorX, float baselineY, float width, bool whitespace_)
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: font (font_), character (character_), glyph (glyphNumber),
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x (anchorX), y (baselineY), w (width), whitespace (whitespace_)
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{
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}
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void PositionedGlyph::draw (Graphics& g) const
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{
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draw (g, {});
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}
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void PositionedGlyph::draw (Graphics& g, AffineTransform transform) const
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{
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if (isWhitespace())
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return;
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auto& context = g.getInternalContext();
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context.setFont (font);
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const uint16_t glyphs[] { static_cast<uint16_t> (glyph) };
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const Point<float> positions[] { Point { x, y } };
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context.drawGlyphs (glyphs, positions, 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 (auto t = font.getTypefacePtr())
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{
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Path p;
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t->getOutlineForGlyph (font.getMetricsKind(), 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 (auto t = font.getTypefacePtr())
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{
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Path p;
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t->getOutlineForGlyph (font.getMetricsKind(), 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 (float deltaX, 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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//==============================================================================
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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 (int index) 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, 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, const String& text, float xOffset, 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, const String& text,
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float xOffset, float yOffset,
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float maxWidthPixels, 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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auto textLen = newGlyphs.size();
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glyphs.ensureStorageAllocated (glyphs.size() + textLen);
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auto t = text.getCharPointer();
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for (int i = 0; i < textLen; ++i)
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{
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auto 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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auto thisX = xOffsets.getUnchecked (i);
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auto isWhitespace = isNonBreakingSpace (*t) || 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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int GlyphArrangement::insertEllipsis (const Font& font, float maxXPos, int startIndex, int endIndex)
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{
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int numDeleted = 0;
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if (! glyphs.isEmpty())
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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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auto 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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auto& 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, const String& text,
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float x, float y, float maxLineWidth,
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Justification horizontalLayout,
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float leading)
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{
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auto lineStartIndex = glyphs.size();
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addLineOfText (font, text, x, y);
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auto 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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auto 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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auto& pg = glyphs.getReference (i);
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auto 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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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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auto currentLineStartX = glyphs.getReference (lineStartIndex).getLeft();
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auto 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() + leading;
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}
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}
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void GlyphArrangement::addFittedText (const Font& f, const String& text,
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float x, float y, float width, float height,
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Justification layout, int maximumLines,
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float minimumHorizontalScale)
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{
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if (approximatelyEqual (minimumHorizontalScale, 0.0f))
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minimumHorizontalScale = Font::getDefaultMinimumHorizontalScaleFactor();
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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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addLinesWithLineBreaks (text, f, x, y, width, height, layout);
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}
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else
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{
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auto startIndex = glyphs.size();
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auto trimmed = text.trim();
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addLineOfText (f, trimmed, x, y);
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auto numGlyphs = glyphs.size() - startIndex;
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if (numGlyphs > 0)
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{
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auto 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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{
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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, numGlyphs, width / lineWidth);
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justifyGlyphs (startIndex, numGlyphs, 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, numGlyphs, x, y, width, height,
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f, layout, minimumHorizontalScale);
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}
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else
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{
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splitLines (trimmed, f, startIndex, x, y, width, height,
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maximumLines, lineWidth, layout, minimumHorizontalScale);
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}
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}
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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 (! approximatelyEqual (dx, 0.0f) || ! approximatelyEqual (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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void GlyphArrangement::addLinesWithLineBreaks (const String& text, const Font& f,
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float x, float y, float width, float height, Justification layout)
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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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auto bb = ga.getBoundingBox (0, -1, false);
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auto 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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}
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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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auto lineStartX = glyphs.getReference (start).getLeft();
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auto 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);
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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, 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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auto xAnchor = glyphs.getReference (startIndex).getLeft();
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while (--num >= 0)
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{
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auto& pg = glyphs.getReference (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, 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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auto& pg = glyphs.getReference (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 (int startIndex, int num,
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float x, float y, float width, float height,
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Justification justification)
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{
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jassert (num >= 0 && startIndex >= 0);
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if (glyphs.size() > 0 && num > 0)
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{
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auto bb = getBoundingBox (startIndex, num, ! justification.testFlags (Justification::horizontallyJustified
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| Justification::horizontallyCentred));
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float deltaX = x, deltaY = y;
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if (justification.testFlags (Justification::horizontallyJustified)) deltaX -= bb.getX();
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else if (justification.testFlags (Justification::horizontallyCentred)) deltaX += (width - bb.getWidth()) * 0.5f - bb.getX();
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else if (justification.testFlags (Justification::right)) deltaX += width - bb.getRight();
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else deltaX -= bb.getX();
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if (justification.testFlags (Justification::top)) deltaY -= bb.getY();
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else if (justification.testFlags (Justification::bottom)) deltaY += height - bb.getBottom();
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else deltaY += (height - bb.getHeight()) * 0.5f - bb.getY();
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moveRangeOfGlyphs (startIndex, num, deltaX, deltaY);
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if (justification.testFlags (Justification::horizontallyJustified))
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{
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int lineStart = 0;
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auto baseY = glyphs.getReference (startIndex).getBaselineY();
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int i;
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for (i = 0; i < num; ++i)
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{
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auto glyphY = glyphs.getReference (startIndex + i).getBaselineY();
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if (! approximatelyEqual (glyphY, baseY))
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{
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spreadOutLine (startIndex + lineStart, i - lineStart, width);
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lineStart = i;
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baseY = glyphY;
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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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void GlyphArrangement::spreadOutLine (int start, int num, float targetWidth)
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{
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if (start + num < glyphs.size()
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&& glyphs.getReference (start + num - 1).getCharacter() != '\r'
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&& glyphs.getReference (start + num - 1).getCharacter() != '\n')
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{
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int numSpaces = 0;
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int spacesAtEnd = 0;
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for (int i = 0; i < num; ++i)
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{
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if (glyphs.getReference (start + i).isWhitespace())
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{
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++spacesAtEnd;
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++numSpaces;
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}
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else
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{
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spacesAtEnd = 0;
|
|
}
|
|
}
|
|
|
|
numSpaces -= spacesAtEnd;
|
|
|
|
if (numSpaces > 0)
|
|
{
|
|
auto startX = glyphs.getReference (start).getLeft();
|
|
auto endX = glyphs.getReference (start + num - 1 - spacesAtEnd).getRight();
|
|
|
|
auto 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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool isBreakableGlyph (const PositionedGlyph& g) noexcept
|
|
{
|
|
return ! isNonBreakingSpace (g.getCharacter()) && (g.isWhitespace() || g.getCharacter() == '-');
|
|
}
|
|
|
|
void GlyphArrangement::splitLines (const String& text, Font font, int startIndex,
|
|
float x, float y, float width, float height, int maximumLines,
|
|
float lineWidth, Justification layout, float minimumHorizontalScale)
|
|
{
|
|
auto length = text.length();
|
|
auto originalStartIndex = startIndex;
|
|
int numLines = 1;
|
|
|
|
if (length <= 12 && ! text.containsAnyOf (" -\t\r\n"))
|
|
maximumLines = 1;
|
|
|
|
maximumLines = jmin (maximumLines, length);
|
|
|
|
while (numLines < maximumLines)
|
|
{
|
|
++numLines;
|
|
auto newFontHeight = height / (float) numLines;
|
|
|
|
if (newFontHeight < font.getHeight())
|
|
{
|
|
font.setHeight (jmax (8.0f, newFontHeight));
|
|
|
|
removeRangeOfGlyphs (startIndex, -1);
|
|
addLineOfText (font, text, x, y);
|
|
|
|
lineWidth = glyphs.getReference (glyphs.size() - 1).getRight()
|
|
- glyphs.getReference (startIndex).getLeft();
|
|
}
|
|
|
|
// Try to estimate the point at which there are enough lines to fit the text,
|
|
// allowing for unevenness in the lengths due to differently sized words.
|
|
const float lineLengthUnevennessAllowance = 80.0f;
|
|
|
|
if ((float) numLines > (lineWidth + lineLengthUnevennessAllowance) / width || newFontHeight < 8.0f)
|
|
break;
|
|
}
|
|
|
|
if (numLines < 1)
|
|
numLines = 1;
|
|
|
|
int lineIndex = 0;
|
|
auto lineY = y;
|
|
auto widthPerLine = jmin (width / minimumHorizontalScale,
|
|
lineWidth / (float) numLines);
|
|
|
|
while (lineY < y + height)
|
|
{
|
|
auto endIndex = startIndex;
|
|
auto lineStartX = glyphs.getReference (startIndex).getLeft();
|
|
auto lineBottomY = lineY + font.getHeight();
|
|
|
|
if (lineIndex++ >= numLines - 1
|
|
|| lineBottomY >= y + height)
|
|
{
|
|
widthPerLine = width;
|
|
endIndex = glyphs.size();
|
|
}
|
|
else
|
|
{
|
|
while (endIndex < glyphs.size())
|
|
{
|
|
if (glyphs.getReference (endIndex).getRight() - lineStartX > widthPerLine)
|
|
{
|
|
// got to a point where the line's too long, so skip forward to find a
|
|
// good place to break it..
|
|
auto searchStartIndex = endIndex;
|
|
|
|
while (endIndex < glyphs.size())
|
|
{
|
|
auto& g = glyphs.getReference (endIndex);
|
|
|
|
if ((g.getRight() - lineStartX) * minimumHorizontalScale < width)
|
|
{
|
|
if (isBreakableGlyph (g))
|
|
{
|
|
++endIndex;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// can't find a suitable break, so try looking backwards..
|
|
endIndex = searchStartIndex;
|
|
|
|
for (int back = 1; back < jmin (7, endIndex - startIndex - 1); ++back)
|
|
{
|
|
if (isBreakableGlyph (glyphs.getReference (endIndex - back)))
|
|
{
|
|
endIndex -= back - 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
++endIndex;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
++endIndex;
|
|
}
|
|
|
|
auto wsStart = endIndex;
|
|
auto wsEnd = endIndex;
|
|
|
|
while (wsStart > 0 && glyphs.getReference (wsStart - 1).isWhitespace())
|
|
--wsStart;
|
|
|
|
while (wsEnd < glyphs.size() && glyphs.getReference (wsEnd).isWhitespace())
|
|
++wsEnd;
|
|
|
|
removeRangeOfGlyphs (wsStart, wsEnd - wsStart);
|
|
endIndex = jmax (wsStart, startIndex + 1);
|
|
}
|
|
|
|
endIndex -= fitLineIntoSpace (startIndex, endIndex - startIndex,
|
|
x, lineY, width, font.getHeight(), font,
|
|
layout.getOnlyHorizontalFlags() | Justification::verticallyCentred,
|
|
minimumHorizontalScale);
|
|
|
|
startIndex = endIndex;
|
|
lineY = lineBottomY;
|
|
|
|
if (startIndex >= glyphs.size())
|
|
break;
|
|
}
|
|
|
|
justifyGlyphs (originalStartIndex, glyphs.size() - originalStartIndex,
|
|
x, y, width, height, layout.getFlags() & ~Justification::horizontallyJustified);
|
|
}
|
|
|
|
//==============================================================================
|
|
void GlyphArrangement::drawGlyphUnderline (const Graphics& g,
|
|
int i,
|
|
AffineTransform transform) const
|
|
{
|
|
const auto pg = glyphs.getReference (i);
|
|
|
|
if (! pg.font.isUnderlined())
|
|
return;
|
|
|
|
const auto lineThickness = (pg.font.getDescent()) * 0.3f;
|
|
|
|
auto nextX = pg.x + pg.w;
|
|
|
|
if (i < glyphs.size() - 1 && approximatelyEqual (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
|
|
{
|
|
draw (g, {});
|
|
}
|
|
|
|
void GlyphArrangement::draw (const Graphics& g, AffineTransform transform) const
|
|
{
|
|
std::vector<uint16_t> glyphNumbers;
|
|
std::vector<Point<float>> positions;
|
|
|
|
glyphNumbers.reserve (static_cast<size_t> (glyphs.size()));
|
|
positions.reserve (static_cast<size_t> (glyphs.size()));
|
|
|
|
for (auto it = glyphs.begin(), end = glyphs.end(); it != end;)
|
|
{
|
|
const auto adjacent = std::adjacent_find (it, end, [] (const auto& a, const auto& b)
|
|
{
|
|
return a.font != b.font;
|
|
});
|
|
|
|
const auto next = adjacent + (adjacent == end ? 0 : 1);
|
|
|
|
glyphNumbers.clear();
|
|
std::transform (it, next, std::back_inserter (glyphNumbers), [] (const PositionedGlyph& x)
|
|
{
|
|
return (uint16_t) x.glyph;
|
|
});
|
|
|
|
positions.clear();
|
|
std::transform (it, next, std::back_inserter (positions), [] (const PositionedGlyph& x)
|
|
{
|
|
return Point { x.x, x.y };
|
|
});
|
|
|
|
auto& ctx = g.getInternalContext();
|
|
ctx.setFont (it->font);
|
|
ctx.drawGlyphs (glyphNumbers, positions, transform);
|
|
|
|
it = next;
|
|
}
|
|
|
|
for (const auto pair : enumerate (glyphs))
|
|
drawGlyphUnderline (g, static_cast<int> (pair.index), transform);
|
|
}
|
|
|
|
void GlyphArrangement::createPath (Path& path) const
|
|
{
|
|
for (auto& g : glyphs)
|
|
g.createPath (path);
|
|
}
|
|
|
|
int GlyphArrangement::findGlyphIndexAt (float x, float y) const
|
|
{
|
|
for (int i = 0; i < glyphs.size(); ++i)
|
|
if (glyphs.getReference (i).hitTest (x, y))
|
|
return i;
|
|
|
|
return -1;
|
|
}
|
|
|
|
} // namespace juce
|