/*
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2021 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <dali-toolkit/internal/text/text-view.h>
// EXTERNAL INCLUDES
+#include <dali/devel-api/text-abstraction/font-client.h>
#include <dali/public-api/math/vector2.h>
namespace Dali
{
-
namespace Toolkit
{
-
namespace Text
{
-
struct View::Impl
{
- VisualModelPtr mVisualModel;
+ VisualModelPtr mVisualModel;
+ TextAbstraction::FontClient mFontClient; ///< Handle to the font client.
};
View::View()
-: mImpl( NULL )
+: mImpl(NULL)
{
mImpl = new View::Impl();
+
+ mImpl->mFontClient = TextAbstraction::FontClient::Get();
}
View::~View()
delete mImpl;
}
-void View::SetVisualModel( VisualModelPtr visualModel )
+void View::SetVisualModel(VisualModelPtr visualModel)
{
mImpl->mVisualModel = visualModel;
}
+const Vector2& View::GetControlSize() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->mControlSize;
+ }
+
+ return Vector2::ZERO;
+}
+
+const Vector2& View::GetLayoutSize() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->GetLayoutSize();
+ }
+
+ return Vector2::ZERO;
+}
+
+Length View::GetNumberOfGlyphs() const
+{
+ if(mImpl->mVisualModel)
+ {
+ const VisualModel& model = *mImpl->mVisualModel;
+
+ const Length glyphCount = model.mGlyphs.Count();
+ const Length positionCount = model.mGlyphPositions.Count();
+
+ DALI_ASSERT_DEBUG(positionCount <= glyphCount && "Invalid glyph positions in Model");
+
+ return (positionCount < glyphCount) ? positionCount : glyphCount;
+ }
+
+ return 0;
+}
+
+Length View::GetGlyphs(GlyphInfo* glyphs,
+ Vector2* glyphPositions,
+ float& minLineOffset,
+ GlyphIndex glyphIndex,
+ Length numberOfGlyphs) const
+{
+ Length numberOfLaidOutGlyphs = 0u;
+
+ if(mImpl->mVisualModel)
+ {
+ // If ellipsis is enabled, the number of glyphs the layout engine has laid out may be less than 'numberOfGlyphs'.
+ // Check the last laid out line to know if the layout engine elided some text.
+
+ const Length numberOfLines = mImpl->mVisualModel->mLines.Count();
+ if(numberOfLines > 0u)
+ {
+ const LineRun& lastLine = *(mImpl->mVisualModel->mLines.Begin() + (numberOfLines - 1u));
+
+ // If ellipsis is enabled, calculate the number of laid out glyphs.
+ // Otherwise use the given number of glyphs.
+ if(lastLine.ellipsis)
+ {
+ numberOfLaidOutGlyphs = lastLine.glyphRun.glyphIndex + lastLine.glyphRun.numberOfGlyphs;
+ }
+ else
+ {
+ numberOfLaidOutGlyphs = numberOfGlyphs;
+ }
+
+ if(0u < numberOfLaidOutGlyphs)
+ {
+ // Retrieve from the visual model the glyphs and positions.
+ mImpl->mVisualModel->GetGlyphs(glyphs,
+ glyphIndex,
+ numberOfLaidOutGlyphs);
+
+ mImpl->mVisualModel->GetGlyphPositions(glyphPositions,
+ glyphIndex,
+ numberOfLaidOutGlyphs);
+
+ // Get the lines for the given range of glyphs.
+ // The lines contain the alignment offset which needs to be added to the glyph's position.
+ LineIndex firstLine = 0u;
+ Length numberOfLines = 0u;
+ mImpl->mVisualModel->GetNumberOfLines(glyphIndex,
+ numberOfLaidOutGlyphs,
+ firstLine,
+ numberOfLines);
+
+ Vector<LineRun> lines;
+ lines.Resize(numberOfLines);
+ LineRun* lineBuffer = lines.Begin();
+
+ mImpl->mVisualModel->GetLinesOfGlyphRange(lineBuffer,
+ glyphIndex,
+ numberOfLaidOutGlyphs);
+
+ // Get the first line for the given glyph range.
+ LineIndex lineIndex = firstLine;
+ LineRun* line = lineBuffer + lineIndex;
+
+ // Index of the last glyph of the line.
+ GlyphIndex lastGlyphIndexOfLine = line->glyphRun.glyphIndex + line->glyphRun.numberOfGlyphs - 1u;
+
+ // Add the alignment offset to the glyph's position.
+
+ minLineOffset = line->alignmentOffset;
+ float penY = line->ascender;
+ for(Length index = 0u; index < numberOfLaidOutGlyphs; ++index)
+ {
+ Vector2& position = *(glyphPositions + index);
+ position.x += line->alignmentOffset;
+ position.y += penY;
+
+ if(lastGlyphIndexOfLine == index)
+ {
+ penY += -line->descender;
+
+ // Get the next line.
+ ++lineIndex;
+
+ if(lineIndex < numberOfLines)
+ {
+ line = lineBuffer + lineIndex;
+ minLineOffset = std::min(minLineOffset, line->alignmentOffset);
+
+ lastGlyphIndexOfLine = line->glyphRun.glyphIndex + line->glyphRun.numberOfGlyphs - 1u;
+
+ penY += line->ascender;
+ }
+ }
+ }
+
+ if(1u == numberOfLaidOutGlyphs)
+ {
+ // not a point try to do ellipsis with only one laid out character.
+ return numberOfLaidOutGlyphs;
+ }
+
+ if(lastLine.ellipsis)
+ {
+ if((1u == numberOfLines) &&
+ (lastLine.ascender - lastLine.descender > mImpl->mVisualModel->mControlSize.height))
+ {
+ // Get the first glyph which is going to be replaced and the ellipsis glyph.
+ GlyphInfo& glyphInfo = *glyphs;
+ const GlyphInfo& ellipsisGlyph = mImpl->mFontClient.GetEllipsisGlyph(mImpl->mFontClient.GetPointSize(glyphInfo.fontId));
+
+ // Change the 'x' and 'y' position of the ellipsis glyph.
+ Vector2& position = *glyphPositions;
+ position.x = ellipsisGlyph.xBearing;
+ position.y = mImpl->mVisualModel->mControlSize.height - ellipsisGlyph.yBearing;
+
+ // Replace the glyph by the ellipsis glyph.
+ glyphInfo = ellipsisGlyph;
+
+ return 1u;
+ }
+
+ // firstPenX, penY and firstPenSet are used to position the ellipsis glyph if needed.
+ float firstPenX = 0.f; // Used if rtl text is elided.
+ float penY = 0.f;
+ bool firstPenSet = false;
+
+ // Add the ellipsis glyph.
+ bool inserted = false;
+ float removedGlypsWidth = 0.f;
+ Length numberOfRemovedGlyphs = 0u;
+ GlyphIndex index = numberOfLaidOutGlyphs - 1u;
+
+ // The ellipsis glyph has to fit in the place where the last glyph(s) is(are) removed.
+ while(!inserted)
+ {
+ const GlyphInfo& glyphToRemove = *(glyphs + index);
+
+ if(0u != glyphToRemove.fontId)
+ {
+ // i.e. The font id of the glyph shaped from the '\n' character is zero.
+
+ // Need to reshape the glyph as the font may be different in size.
+ const GlyphInfo& ellipsisGlyph = mImpl->mFontClient.GetEllipsisGlyph(mImpl->mFontClient.GetPointSize(glyphToRemove.fontId));
+
+ if(!firstPenSet)
+ {
+ const Vector2& position = *(glyphPositions + index);
+
+ // Calculates the penY of the current line. It will be used to position the ellipsis glyph.
+ penY = position.y + glyphToRemove.yBearing;
+
+ // Calculates the first penX which will be used if rtl text is elided.
+ firstPenX = position.x - glyphToRemove.xBearing;
+ if(firstPenX < -ellipsisGlyph.xBearing)
+ {
+ // Avoids to exceed the bounding box when rtl text is elided.
+ firstPenX = -ellipsisGlyph.xBearing;
+ }
+
+ removedGlypsWidth = -ellipsisGlyph.xBearing;
+
+ firstPenSet = true;
+ }
+
+ removedGlypsWidth += std::min(glyphToRemove.advance, (glyphToRemove.xBearing + glyphToRemove.width));
+
+ // Calculate the width of the ellipsis glyph and check if it fits.
+ const float ellipsisGlyphWidth = ellipsisGlyph.width + ellipsisGlyph.xBearing;
+ if(ellipsisGlyphWidth < removedGlypsWidth)
+ {
+ GlyphInfo& glyphInfo = *(glyphs + index);
+ Vector2& position = *(glyphPositions + index);
+ position.x -= (0.f > glyphInfo.xBearing) ? glyphInfo.xBearing : 0.f;
+
+ // Replace the glyph by the ellipsis glyph.
+ glyphInfo = ellipsisGlyph;
+
+ // Change the 'x' and 'y' position of the ellipsis glyph.
+
+ if(position.x > firstPenX)
+ {
+ position.x = firstPenX + removedGlypsWidth - ellipsisGlyphWidth;
+ }
+
+ position.x += ellipsisGlyph.xBearing;
+ position.y = penY - ellipsisGlyph.yBearing;
+
+ inserted = true;
+ }
+ }
+
+ if(!inserted)
+ {
+ if(index > 0u)
+ {
+ --index;
+ }
+ else
+ {
+ // No space for the ellipsis.
+ inserted = true;
+ }
+ ++numberOfRemovedGlyphs;
+ }
+ }
+
+ // 'Removes' all the glyphs after the ellipsis glyph.
+ numberOfLaidOutGlyphs -= numberOfRemovedGlyphs;
+ }
+ }
+ }
+ }
+
+ return numberOfLaidOutGlyphs;
+}
+
+const Vector4* const View::GetColors() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->mColors.Begin();
+ }
+
+ return NULL;
+}
+
+const ColorIndex* const View::GetColorIndices() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->mColorIndices.Begin();
+ }
+
+ return NULL;
+}
+
+const Vector4* const View::GetBackgroundColors() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->mBackgroundColors.Begin();
+ }
+
+ return nullptr;
+}
+
+const ColorIndex* const View::GetBackgroundColorIndices() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->mBackgroundColorIndices.Begin();
+ }
+
+ return nullptr;
+}
+
const Vector4& View::GetTextColor() const
{
- if ( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- VisualModel& model = *mImpl->mVisualModel;
- return model.GetTextColor();
+ return mImpl->mVisualModel->GetTextColor();
}
return Vector4::ZERO;
}
const Vector2& View::GetShadowOffset() const
{
- if ( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- VisualModel& model = *mImpl->mVisualModel;
- return model.GetShadowOffset();
+ return mImpl->mVisualModel->GetShadowOffset();
}
return Vector2::ZERO;
}
const Vector4& View::GetShadowColor() const
{
- if ( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- VisualModel& model = *mImpl->mVisualModel;
- return model.GetShadowColor();
+ return mImpl->mVisualModel->GetShadowColor();
}
return Vector4::ZERO;
}
const Vector4& View::GetUnderlineColor() const
{
- if ( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- VisualModel& model = *mImpl->mVisualModel;
- return model.GetUnderlineColor();
+ return mImpl->mVisualModel->GetUnderlineColor();
}
return Vector4::ZERO;
}
bool View::IsUnderlineEnabled() const
{
- if ( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- VisualModel& model = *mImpl->mVisualModel;
- return model.IsUnderlineEnabled();
+ return mImpl->mVisualModel->IsUnderlineEnabled();
}
return false;
}
-Length View::GetNumberOfGlyphs() const
+float View::GetUnderlineHeight() const
{
- if( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- VisualModel& model = *mImpl->mVisualModel;
+ return mImpl->mVisualModel->GetUnderlineHeight();
+ }
+ return 0.0f;
+}
- Length glyphCount = model.GetNumberOfGlyphs();
- Length positionCount = model.GetNumberOfGlyphPositions();
+Length View::GetNumberOfUnderlineRuns() const
+{
+ if(mImpl->mVisualModel)
+ {
+ return mImpl->mVisualModel->GetNumberOfUnderlineRuns();
+ }
- DALI_ASSERT_DEBUG( positionCount <= glyphCount && "Invalid glyph positions in Model" );
+ return 0u;
+}
- return (positionCount < glyphCount) ? positionCount : glyphCount;
+void View::GetUnderlineRuns(GlyphRun* underlineRuns,
+ UnderlineRunIndex index,
+ Length numberOfRuns) const
+{
+ if(mImpl->mVisualModel)
+ {
+ mImpl->mVisualModel->GetUnderlineRuns(underlineRuns,
+ index,
+ numberOfRuns);
}
-
- return 0;
}
-void View::GetGlyphs( GlyphInfo* glyphs,
- GlyphIndex glyphIndex,
- Length numberOfGlyphs ) const
+const Vector4& View::GetOutlineColor() const
{
- if( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- mImpl->mVisualModel->GetGlyphs( glyphs, glyphIndex, numberOfGlyphs );
+ return mImpl->mVisualModel->GetOutlineColor();
}
+ return Vector4::ZERO;
}
-void View::GetGlyphPositions( Vector2* glyphPositions,
- GlyphIndex glyphIndex,
- Length numberOfGlyphs ) const
+uint16_t View::GetOutlineWidth() const
{
- if( mImpl->mVisualModel )
+ if(mImpl->mVisualModel)
{
- mImpl->mVisualModel->GetGlyphPositions( glyphPositions, glyphIndex, numberOfGlyphs );
+ return mImpl->mVisualModel->GetOutlineWidth();
}
+ return 0u;
}
} // namespace Text
projects / platform / core / uifw / dali-toolkit.git / blobdiff