diff options
Diffstat (limited to 'drawinglayer/source/primitive2d/textprimitive2d.cxx')
| -rw-r--r-- | drawinglayer/source/primitive2d/textprimitive2d.cxx | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/textprimitive2d.cxx b/drawinglayer/source/primitive2d/textprimitive2d.cxx new file mode 100644 index 000000000..e85d61009 --- /dev/null +++ b/drawinglayer/source/primitive2d/textprimitive2d.cxx @@ -0,0 +1,329 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <drawinglayer/primitive2d/textprimitive2d.hxx> +#include <drawinglayer/primitive2d/textlayoutdevice.hxx> +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx> +#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx> +#include <primitive2d/texteffectprimitive2d.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> + + +using namespace com::sun::star; + + +namespace +{ + // adapts fontScale for usage with TextLayouter. Input is rScale which is the extracted + // scale from a text transformation. A copy is modified so that it contains only positive + // scalings and XY-equal scalings to allow to get a non-X-scaled Vcl-Font for TextLayouter. + // rScale is adapted accordingly to contain the corrected scale which would need to be + // applied to e.g. outlines received from TextLayouter under usage of fontScale. This + // includes Y-Scale, X-Scale-correction and mirrorings. + basegfx::B2DVector getCorrectedScaleAndFontScale(basegfx::B2DVector& rScale) + { + // copy input value + basegfx::B2DVector aFontScale(rScale); + + // correct FontHeight settings + if(basegfx::fTools::equalZero(aFontScale.getY())) + { + // no font height; choose one and adapt scale to get back to original scaling + static const double fDefaultFontScale(100.0); + rScale.setY(1.0 / fDefaultFontScale); + aFontScale.setY(fDefaultFontScale); + } + else if(basegfx::fTools::less(aFontScale.getY(), 0.0)) + { + // negative font height; invert and adapt scale to get back to original scaling + aFontScale.setY(-aFontScale.getY()); + rScale.setY(-1.0); + } + else + { + // positive font height; adapt scale; scaling will be part of the polygons + rScale.setY(1.0); + } + + // correct FontWidth settings + if(basegfx::fTools::equal(aFontScale.getX(), aFontScale.getY())) + { + // no FontScale, adapt scale + rScale.setX(1.0); + } + else + { + // If FontScale is used, force to no FontScale to get a non-scaled VCL font. + // Adapt scaling in X accordingly. + rScale.setX(aFontScale.getX() / aFontScale.getY()); + aFontScale.setX(aFontScale.getY()); + } + + return aFontScale; + } +} // end of anonymous namespace + + +namespace drawinglayer::primitive2d +{ + void TextSimplePortionPrimitive2D::getTextOutlinesAndTransformation(basegfx::B2DPolyPolygonVector& rTarget, basegfx::B2DHomMatrix& rTransformation) const + { + if(!getTextLength()) + return; + + // decompose object transformation to single values + basegfx::B2DVector aScale, aTranslate; + double fRotate, fShearX; + + // if decomposition returns false, create no geometry since e.g. scaling may + // be zero + if (!(getTextTransform().decompose(aScale, aTranslate, fRotate, fShearX) && aScale.getX() != 0.0)) + return; + + // handle special case: If scale is negative in (x,y) (3rd quadrant), it can + // be expressed as rotation by PI + if(basegfx::fTools::less(aScale.getX(), 0.0) && basegfx::fTools::less(aScale.getY(), 0.0)) + { + aScale = basegfx::absolute(aScale); + fRotate += F_PI; + } + + // for the TextLayouterDevice, it is necessary to have a scaling representing + // the font size. Since we want to extract polygons here, it is okay to + // work just with scaling and to ignore shear, rotation and translation, + // all that can be applied to the polygons later + const basegfx::B2DVector aFontScale(getCorrectedScaleAndFontScale(aScale)); + + // prepare textlayoutdevice + TextLayouterDevice aTextLayouter; + aTextLayouter.setFontAttribute( + getFontAttribute(), + aFontScale.getX(), + aFontScale.getY(), + getLocale()); + + // When getting outlines from stretched text (aScale.getX() != 1.0) it + // is necessary to inverse-scale the DXArray (if used) to not get the + // outlines already aligned to given, but wrong DXArray + if(!getDXArray().empty() && !basegfx::fTools::equal(aScale.getX(), 1.0)) + { + std::vector< double > aScaledDXArray = getDXArray(); + const double fDXArrayScale(1.0 / aScale.getX()); + + for(double & a : aScaledDXArray) + { + a *= fDXArrayScale; + } + + // get the text outlines + aTextLayouter.getTextOutlines( + rTarget, + getText(), + getTextPosition(), + getTextLength(), + aScaledDXArray); + } + else + { + // get the text outlines + aTextLayouter.getTextOutlines( + rTarget, + getText(), + getTextPosition(), + getTextLength(), + getDXArray()); + } + + // create primitives for the outlines + const sal_uInt32 nCount(rTarget.size()); + + if(nCount) + { + // prepare object transformation for polygons + rTransformation = basegfx::utils::createScaleShearXRotateTranslateB2DHomMatrix( + aScale, fShearX, fRotate, aTranslate); + } + } + + void TextSimplePortionPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& /*rViewInformation*/) const + { + if(!getTextLength()) + return; + + Primitive2DContainer aRetval; + basegfx::B2DPolyPolygonVector aB2DPolyPolyVector; + basegfx::B2DHomMatrix aPolygonTransform; + + // get text outlines and their object transformation + getTextOutlinesAndTransformation(aB2DPolyPolyVector, aPolygonTransform); + + // create primitives for the outlines + const sal_uInt32 nCount(aB2DPolyPolyVector.size()); + + if(!nCount) + return; + + // alloc space for the primitives + aRetval.resize(nCount); + + // color-filled polypolygons + for(sal_uInt32 a(0); a < nCount; a++) + { + // prepare polypolygon + basegfx::B2DPolyPolygon& rPolyPolygon = aB2DPolyPolyVector[a]; + rPolyPolygon.transform(aPolygonTransform); + aRetval[a] = new PolyPolygonColorPrimitive2D(rPolyPolygon, getFontColor()); + } + + if(getFontAttribute().getOutline()) + { + // decompose polygon transformation to single values + basegfx::B2DVector aScale, aTranslate; + double fRotate, fShearX; + aPolygonTransform.decompose(aScale, aTranslate, fRotate, fShearX); + + // create outline text effect with current content and replace + Primitive2DReference aNewTextEffect(new TextEffectPrimitive2D( + aRetval, + aTranslate, + fRotate, + TextEffectStyle2D::Outline)); + + aRetval = Primitive2DContainer { aNewTextEffect }; + } + + rContainer.insert(rContainer.end(), aRetval.begin(), aRetval.end()); + } + + TextSimplePortionPrimitive2D::TextSimplePortionPrimitive2D( + const basegfx::B2DHomMatrix& rNewTransform, + const OUString& rText, + sal_Int32 nTextPosition, + sal_Int32 nTextLength, + const std::vector< double >& rDXArray, + const attribute::FontAttribute& rFontAttribute, + const css::lang::Locale& rLocale, + const basegfx::BColor& rFontColor, + bool bFilled, + long nWidthToFill, + const Color& rTextFillColor) + : BufferedDecompositionPrimitive2D(), + maTextTransform(rNewTransform), + maText(rText), + mnTextPosition(nTextPosition), + mnTextLength(nTextLength), + maDXArray(rDXArray), + maFontAttribute(rFontAttribute), + maLocale(rLocale), + maFontColor(rFontColor), + mbFilled(bFilled), + mnWidthToFill(nWidthToFill), + maTextFillColor(rTextFillColor), + maB2DRange() + { +#if OSL_DEBUG_LEVEL > 0 + const sal_Int32 aStringLength(getText().getLength()); + OSL_ENSURE(aStringLength >= getTextPosition() && aStringLength >= getTextPosition() + getTextLength(), + "TextSimplePortionPrimitive2D with text out of range (!)"); +#endif + } + + bool LocalesAreEqual(const css::lang::Locale& rA, const css::lang::Locale& rB) + { + return (rA.Language == rB.Language + && rA.Country == rB.Country + && rA.Variant == rB.Variant); + } + + bool TextSimplePortionPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const + { + if(BufferedDecompositionPrimitive2D::operator==(rPrimitive)) + { + const TextSimplePortionPrimitive2D& rCompare = static_cast<const TextSimplePortionPrimitive2D&>(rPrimitive); + + return (getTextTransform() == rCompare.getTextTransform() + && getText() == rCompare.getText() + && getTextPosition() == rCompare.getTextPosition() + && getTextLength() == rCompare.getTextLength() + && getDXArray() == rCompare.getDXArray() + && getFontAttribute() == rCompare.getFontAttribute() + && LocalesAreEqual(getLocale(), rCompare.getLocale()) + && getFontColor() == rCompare.getFontColor() + && mbFilled == rCompare.mbFilled + && mnWidthToFill == rCompare.mnWidthToFill + && maTextFillColor == rCompare.maTextFillColor); + } + + return false; + } + + basegfx::B2DRange TextSimplePortionPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const + { + if(maB2DRange.isEmpty() && getTextLength()) + { + // get TextBoundRect as base size + // decompose object transformation to single values + basegfx::B2DVector aScale, aTranslate; + double fRotate, fShearX; + + if(getTextTransform().decompose(aScale, aTranslate, fRotate, fShearX)) + { + // for the TextLayouterDevice, it is necessary to have a scaling representing + // the font size. Since we want to extract polygons here, it is okay to + // work just with scaling and to ignore shear, rotation and translation, + // all that can be applied to the polygons later + const basegfx::B2DVector aFontScale(getCorrectedScaleAndFontScale(aScale)); + + // prepare textlayoutdevice + TextLayouterDevice aTextLayouter; + aTextLayouter.setFontAttribute( + getFontAttribute(), + aFontScale.getX(), + aFontScale.getY(), + getLocale()); + + // get basic text range + basegfx::B2DRange aNewRange(aTextLayouter.getTextBoundRect(getText(), getTextPosition(), getTextLength())); + + // #i104432#, #i102556# take empty results into account + if(!aNewRange.isEmpty()) + { + // prepare object transformation for range + const basegfx::B2DHomMatrix aRangeTransformation(basegfx::utils::createScaleShearXRotateTranslateB2DHomMatrix( + aScale, fShearX, fRotate, aTranslate)); + + // apply range transformation to it + aNewRange.transform(aRangeTransformation); + + // assign to buffered value + const_cast< TextSimplePortionPrimitive2D* >(this)->maB2DRange = aNewRange; + } + } + } + + return maB2DRange; + } + + // provide unique ID + ImplPrimitive2DIDBlock(TextSimplePortionPrimitive2D, PRIMITIVE2D_ID_TEXTSIMPLEPORTIONPRIMITIVE2D) + +} // end of namespace + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |