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+/* -*- 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 "PresenterTextView.hxx"
+#include "PresenterCanvasHelper.hxx"
+#include "PresenterGeometryHelper.hxx"
+#include "PresenterTimer.hxx"
+
+#include <algorithm>
+#include <cmath>
+#include <numeric>
+
+#include <com/sun/star/accessibility/AccessibleTextType.hpp>
+#include <com/sun/star/container/XEnumerationAccess.hpp>
+#include <com/sun/star/i18n/BreakIterator.hpp>
+#include <com/sun/star/i18n/CharacterIteratorMode.hpp>
+#include <com/sun/star/i18n/ScriptDirection.hpp>
+#include <com/sun/star/i18n/WordType.hpp>
+#include <com/sun/star/rendering/CompositeOperation.hpp>
+#include <com/sun/star/rendering/TextDirection.hpp>
+#include <com/sun/star/text/WritingMode2.hpp>
+#include <o3tl/safeint.hxx>
+#include <tools/diagnose_ex.h>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::accessibility;
+using namespace ::com::sun::star::uno;
+
+const static sal_Int64 CaretBlinkInterval = 500 * 1000 * 1000;
+
+//#define SHOW_CHARACTER_BOXES
+
+namespace {
+ sal_Int32 Signum (const sal_Int32 nValue)
+ {
+ if (nValue < 0)
+ return -1;
+ else if (nValue > 0)
+ return +1;
+ else
+ return 0;
+ }
+}
+
+namespace sdext::presenter {
+
+//===== PresenterTextView =====================================================
+
+PresenterTextView::PresenterTextView (
+ const Reference<XComponentContext>& rxContext,
+ const Reference<rendering::XCanvas>& rxCanvas,
+ const ::std::function<void (const css::awt::Rectangle&)>& rInvalidator)
+ : mxCanvas(rxCanvas),
+ mxBreakIterator(),
+ mxScriptTypeDetector(),
+ maLocation(0,0),
+ maSize(0,0),
+ mpFont(),
+ maParagraphs(),
+ mpCaret(std::make_shared<PresenterTextCaret>(
+ rxContext,
+ [this] (sal_Int32 const nParagraphIndex, sal_Int32 const nCharacterIndex)
+ { return this->GetCaretBounds(nParagraphIndex, nCharacterIndex); },
+ rInvalidator)),
+ mnLeftOffset(0),
+ mnTopOffset(0),
+ mbIsFormatPending(false),
+ maTextChangeBroadcaster()
+{
+ Reference<lang::XMultiComponentFactory> xFactory =
+ rxContext->getServiceManager();
+ if ( ! xFactory.is())
+ return;
+
+ // Create the break iterator that we use to break text into lines.
+ mxBreakIterator = i18n::BreakIterator::create(rxContext);
+
+ // Create the script type detector that is used to split paragraphs into
+ // portions of the same text direction.
+ mxScriptTypeDetector.set(
+ xFactory->createInstanceWithContext(
+ "com.sun.star.i18n.ScriptTypeDetector",
+ rxContext),
+ UNO_QUERY_THROW);
+}
+
+void PresenterTextView::SetText (const Reference<text::XText>& rxText)
+{
+ maParagraphs.clear();
+
+ Reference<container::XEnumerationAccess> xParagraphAccess (rxText, UNO_QUERY);
+ if ( ! xParagraphAccess.is())
+ return;
+
+ Reference<container::XEnumeration> xParagraphs =
+ xParagraphAccess->createEnumeration();
+ if ( ! xParagraphs.is())
+ return;
+
+ if ( ! mpFont || ! mpFont->PrepareFont(mxCanvas))
+ return;
+
+ sal_Int32 nCharacterCount (0);
+ while (xParagraphs->hasMoreElements())
+ {
+ SharedPresenterTextParagraph pParagraph = std::make_shared<PresenterTextParagraph>(
+ maParagraphs.size(),
+ mxBreakIterator,
+ mxScriptTypeDetector,
+ Reference<text::XTextRange>(xParagraphs->nextElement(), UNO_QUERY),
+ mpCaret);
+ pParagraph->SetupCellArray(mpFont);
+ pParagraph->SetCharacterOffset(nCharacterCount);
+ nCharacterCount += pParagraph->GetCharacterCount();
+ maParagraphs.push_back(pParagraph);
+ }
+
+ if (mpCaret)
+ mpCaret->HideCaret();
+
+ RequestFormat();
+}
+
+void PresenterTextView::SetTextChangeBroadcaster (
+ const ::std::function<void ()>& rBroadcaster)
+{
+ maTextChangeBroadcaster = rBroadcaster;
+}
+
+void PresenterTextView::SetLocation (const css::geometry::RealPoint2D& rLocation)
+{
+ maLocation = rLocation;
+
+ for (auto& rxParagraph : maParagraphs)
+ {
+ rxParagraph->SetOrigin(
+ maLocation.X - mnLeftOffset,
+ maLocation.Y - mnTopOffset);
+ }
+}
+
+void PresenterTextView::SetSize (const css::geometry::RealSize2D& rSize)
+{
+ maSize = rSize;
+ RequestFormat();
+}
+
+double PresenterTextView::GetTotalTextHeight()
+{
+ if (mbIsFormatPending)
+ {
+ if ( ! mpFont->PrepareFont(mxCanvas))
+ return 0;
+ Format();
+ }
+
+ return std::accumulate(maParagraphs.begin(), maParagraphs.end(), double(0),
+ [](const double& nTotalHeight, const SharedPresenterTextParagraph& rxParagraph) {
+ return nTotalHeight + rxParagraph->GetTotalTextHeight();
+ });
+}
+
+void PresenterTextView::SetFont (const PresenterTheme::SharedFontDescriptor& rpFont)
+{
+ mpFont = rpFont;
+ RequestFormat();
+}
+
+void PresenterTextView::SetOffset(
+ const double nLeft,
+ const double nTop)
+{
+ mnLeftOffset = nLeft;
+ mnTopOffset = nTop;
+
+ // Trigger an update of the text origin stored at the individual paragraphs.
+ SetLocation(maLocation);
+}
+
+void PresenterTextView::MoveCaret (
+ const sal_Int32 nDistance,
+ const sal_Int16 nTextType)
+{
+ if ( ! mpCaret)
+ return;
+
+ // When the caret has not been visible yet then move it to the beginning
+ // of the text.
+ if (mpCaret->GetParagraphIndex() < 0)
+ {
+ mpCaret->SetPosition(0,0);
+ return;
+ }
+
+ sal_Int32 nParagraphIndex (mpCaret->GetParagraphIndex());
+ sal_Int32 nCharacterIndex (mpCaret->GetCharacterIndex());
+ switch (nTextType)
+ {
+ default:
+ case AccessibleTextType::CHARACTER:
+ nCharacterIndex += nDistance;
+ break;
+
+ case AccessibleTextType::WORD:
+ {
+ sal_Int32 nRemainingDistance (nDistance);
+ while (nRemainingDistance != 0)
+ {
+ SharedPresenterTextParagraph pParagraph (GetParagraph(nParagraphIndex));
+ if (pParagraph)
+ {
+ const sal_Int32 nDelta (Signum(nDistance));
+ nCharacterIndex = pParagraph->GetWordBoundary(nCharacterIndex, nDelta);
+ if (nCharacterIndex < 0)
+ {
+ // Go to previous or next paragraph.
+ nParagraphIndex += nDelta;
+ if (nParagraphIndex < 0)
+ {
+ nParagraphIndex = 0;
+ nCharacterIndex = 0;
+ nRemainingDistance = 0;
+ }
+ else if (o3tl::make_unsigned(nParagraphIndex) >= maParagraphs.size())
+ {
+ nParagraphIndex = maParagraphs.size()-1;
+ pParagraph = GetParagraph(nParagraphIndex);
+ if (pParagraph)
+ nCharacterIndex = pParagraph->GetCharacterCount();
+ nRemainingDistance = 0;
+ }
+ else
+ {
+ nRemainingDistance -= nDelta;
+
+ // Move caret one character to the end of
+ // the previous or the start of the next paragraph.
+ pParagraph = GetParagraph(nParagraphIndex);
+ if (pParagraph)
+ {
+ if (nDistance<0)
+ nCharacterIndex = pParagraph->GetCharacterCount();
+ else
+ nCharacterIndex = 0;
+ }
+ }
+ }
+ else
+ nRemainingDistance -= nDelta;
+ }
+ else
+ break;
+ }
+ break;
+ }
+ }
+
+ // Move the caret to the new position.
+ mpCaret->SetPosition(nParagraphIndex, nCharacterIndex);
+}
+
+void PresenterTextView::Paint (
+ const css::awt::Rectangle& rUpdateBox)
+{
+ if ( ! mxCanvas.is())
+ return;
+ if ( ! mpFont->PrepareFont(mxCanvas))
+ return;
+
+ if (mbIsFormatPending)
+ Format();
+
+ // Setup the clipping rectangle. Horizontally we make it a little
+ // larger to allow characters (and the caret) to stick out of their
+ // bounding boxes. This can happen on some characters (like the
+ // uppercase J) for typographical reasons.
+ const sal_Int32 nAdditionalLeftBorder (10);
+ const sal_Int32 nAdditionalRightBorder (5);
+ double nX (maLocation.X - mnLeftOffset);
+ double nY (maLocation.Y - mnTopOffset);
+ const sal_Int32 nClipLeft (::std::max(
+ PresenterGeometryHelper::Round(maLocation.X)-nAdditionalLeftBorder, rUpdateBox.X));
+ const sal_Int32 nClipTop (::std::max(
+ PresenterGeometryHelper::Round(maLocation.Y), rUpdateBox.Y));
+ const sal_Int32 nClipRight (::std::min(
+ PresenterGeometryHelper::Round(maLocation.X+maSize.Width)+nAdditionalRightBorder, rUpdateBox.X+rUpdateBox.Width));
+ const sal_Int32 nClipBottom (::std::min(
+ PresenterGeometryHelper::Round(maLocation.Y+maSize.Height), rUpdateBox.Y+rUpdateBox.Height));
+ if (nClipLeft>=nClipRight || nClipTop>=nClipBottom)
+ return;
+
+ const awt::Rectangle aClipBox(
+ nClipLeft,
+ nClipTop,
+ nClipRight - nClipLeft,
+ nClipBottom - nClipTop);
+ Reference<rendering::XPolyPolygon2D> xClipPolygon (
+ PresenterGeometryHelper::CreatePolygon(aClipBox, mxCanvas->getDevice()));
+
+ const rendering::ViewState aViewState(
+ geometry::AffineMatrix2D(1,0,0, 0,1,0),
+ xClipPolygon);
+
+ rendering::RenderState aRenderState (
+ geometry::AffineMatrix2D(1,0,nX, 0,1,nY),
+ nullptr,
+ Sequence<double>(4),
+ rendering::CompositeOperation::SOURCE);
+ PresenterCanvasHelper::SetDeviceColor(aRenderState, mpFont->mnColor);
+
+ for (const auto& rxParagraph : maParagraphs)
+ {
+ rxParagraph->Paint(
+ mxCanvas,
+ maSize,
+ mpFont,
+ aViewState,
+ aRenderState,
+ mnTopOffset,
+ nClipTop,
+ nClipBottom);
+ }
+
+ aRenderState.AffineTransform.m02 = 0;
+ aRenderState.AffineTransform.m12 = 0;
+
+#ifdef SHOW_CHARACTER_BOXES
+ PresenterCanvasHelper::SetDeviceColor(aRenderState, 0x00808080);
+ for (sal_Int32 nParagraphIndex(0), nParagraphCount(GetParagraphCount());
+ nParagraphIndex<nParagraphCount;
+ ++nParagraphIndex)
+ {
+ const SharedPresenterTextParagraph pParagraph (GetParagraph(nParagraphIndex));
+ if ( ! pParagraph)
+ continue;
+ for (sal_Int32 nCharacterIndex(0),nCharacterCount(pParagraph->GetCharacterCount());
+ nCharacterIndex<nCharacterCount; ++nCharacterIndex)
+ {
+ const awt::Rectangle aBox (pParagraph->GetCharacterBounds(nCharacterIndex, false));
+ mxCanvas->drawPolyPolygon (
+ PresenterGeometryHelper::CreatePolygon(
+ aBox,
+ mxCanvas->getDevice()),
+ aViewState,
+ aRenderState);
+ }
+ }
+ PresenterCanvasHelper::SetDeviceColor(aRenderState, mpFont->mnColor);
+#endif
+
+ if (mpCaret && mpCaret->IsVisible())
+ {
+ mxCanvas->fillPolyPolygon (
+ PresenterGeometryHelper::CreatePolygon(
+ mpCaret->GetBounds(),
+ mxCanvas->getDevice()),
+ aViewState,
+ aRenderState);
+ }
+}
+
+const SharedPresenterTextCaret& PresenterTextView::GetCaret() const
+{
+ return mpCaret;
+}
+
+awt::Rectangle PresenterTextView::GetCaretBounds (
+ sal_Int32 nParagraphIndex,
+ const sal_Int32 nCharacterIndex) const
+{
+ SharedPresenterTextParagraph pParagraph (GetParagraph(nParagraphIndex));
+
+ if (pParagraph)
+ return pParagraph->GetCharacterBounds(nCharacterIndex, true);
+ else
+ return awt::Rectangle(0,0,0,0);
+}
+
+//----- private ---------------------------------------------------------------
+
+void PresenterTextView::RequestFormat()
+{
+ mbIsFormatPending = true;
+}
+
+void PresenterTextView::Format()
+{
+ mbIsFormatPending = false;
+
+ double nY (0);
+ for (const auto& rxParagraph : maParagraphs)
+ {
+ rxParagraph->Format(nY, maSize.Width, mpFont);
+ nY += rxParagraph->GetTotalTextHeight();
+ }
+
+ if (maTextChangeBroadcaster)
+ maTextChangeBroadcaster();
+}
+
+sal_Int32 PresenterTextView::GetParagraphCount() const
+{
+ return maParagraphs.size();
+}
+
+SharedPresenterTextParagraph PresenterTextView::GetParagraph (
+ const sal_Int32 nParagraphIndex) const
+{
+ if (nParagraphIndex < 0)
+ return SharedPresenterTextParagraph();
+ else if (nParagraphIndex>=sal_Int32(maParagraphs.size()))
+ return SharedPresenterTextParagraph();
+ else
+ return maParagraphs[nParagraphIndex];
+}
+
+//===== PresenterTextParagraph ================================================
+
+PresenterTextParagraph::PresenterTextParagraph (
+ const sal_Int32 nParagraphIndex,
+ const Reference<i18n::XBreakIterator>& rxBreakIterator,
+ const Reference<i18n::XScriptTypeDetector>& rxScriptTypeDetector,
+ const Reference<text::XTextRange>& rxTextRange,
+ const SharedPresenterTextCaret& rpCaret)
+ : msParagraphText(),
+ mnParagraphIndex(nParagraphIndex),
+ mpCaret(rpCaret),
+ mxBreakIterator(rxBreakIterator),
+ mxScriptTypeDetector(rxScriptTypeDetector),
+ maLines(),
+ mnVerticalOffset(0),
+ mnXOrigin(0),
+ mnYOrigin(0),
+ mnWidth(0),
+ mnAscent(0),
+ mnDescent(0),
+ mnLineHeight(-1),
+ mnWritingMode (text::WritingMode2::LR_TB),
+ mnCharacterOffset(0),
+ maCells()
+{
+ if (!rxTextRange.is())
+ return;
+
+ Reference<beans::XPropertySet> xProperties (rxTextRange, UNO_QUERY);
+ try
+ {
+ xProperties->getPropertyValue("WritingMode") >>= mnWritingMode;
+ }
+ catch(beans::UnknownPropertyException&)
+ {
+ // Ignore the exception. Use the default value.
+ }
+
+ msParagraphText = rxTextRange->getString();
+}
+
+void PresenterTextParagraph::Paint (
+ const Reference<rendering::XCanvas>& rxCanvas,
+ const geometry::RealSize2D& rSize,
+ const PresenterTheme::SharedFontDescriptor& rpFont,
+ const rendering::ViewState& rViewState,
+ rendering::RenderState& rRenderState,
+ const double nTopOffset,
+ const double nClipTop,
+ const double nClipBottom)
+{
+ if (mnLineHeight <= 0)
+ return;
+
+ sal_Int8 nTextDirection (GetTextDirection());
+
+ const double nSavedM12 (rRenderState.AffineTransform.m12);
+
+ if ( ! IsTextReferencePointLeft())
+ rRenderState.AffineTransform.m02 += rSize.Width;
+
+#ifdef SHOW_CHARACTER_BOXES
+ for (sal_Int32 nIndex=0,nCount=maLines.size();
+ nIndex<nCount;
+ ++nIndex)
+ {
+ Line& rLine (maLines[nIndex]);
+ rLine.ProvideLayoutedLine(msParagraphText, rpFont, nTextDirection);
+ }
+#endif
+
+ for (sal_Int32 nIndex=0,nCount=maLines.size();
+ nIndex<nCount;
+ ++nIndex, rRenderState.AffineTransform.m12 += mnLineHeight)
+ {
+ Line& rLine (maLines[nIndex]);
+
+ // Paint only visible lines.
+ const double nLineTop = rLine.mnBaseLine - mnAscent - nTopOffset;
+ if (nLineTop + mnLineHeight< nClipTop)
+ continue;
+ else if (nLineTop > nClipBottom)
+ break;
+ rLine.ProvideLayoutedLine(msParagraphText, rpFont, nTextDirection);
+
+ rRenderState.AffineTransform.m12 = nSavedM12 + rLine.mnBaseLine;
+
+ rxCanvas->drawTextLayout (
+ rLine.mxLayoutedLine,
+ rViewState,
+ rRenderState);
+ }
+ rRenderState.AffineTransform.m12 = nSavedM12;
+
+ if ( ! IsTextReferencePointLeft())
+ rRenderState.AffineTransform.m02 -= rSize.Width;
+}
+
+void PresenterTextParagraph::Format (
+ const double nY,
+ const double nWidth,
+ const PresenterTheme::SharedFontDescriptor& rpFont)
+{
+ // Make sure that the text view is in a valid and sane state.
+ if ( ! mxBreakIterator.is() || ! mxScriptTypeDetector.is())
+ return;
+ if (nWidth<=0)
+ return;
+ if ( ! rpFont || ! rpFont->mxFont.is())
+ return;
+
+ sal_Int32 nPosition (0);
+
+ mnWidth = nWidth;
+ maLines.clear();
+ mnLineHeight = 0;
+ mnAscent = 0;
+ mnDescent = 0;
+ mnVerticalOffset = nY;
+ maWordBoundaries.clear();
+ maWordBoundaries.push_back(0);
+
+ const rendering::FontMetrics aMetrics (rpFont->mxFont->getFontMetrics());
+ mnAscent = aMetrics.Ascent;
+ mnDescent = aMetrics.Descent;
+ mnLineHeight = aMetrics.Ascent + aMetrics.Descent + aMetrics.ExternalLeading;
+ nPosition = 0;
+ i18n::Boundary aCurrentLine(0,0);
+ while (true)
+ {
+ const i18n::Boundary aWordBoundary = mxBreakIterator->nextWord(
+ msParagraphText,
+ nPosition,
+ lang::Locale(),
+ i18n::WordType::ANYWORD_IGNOREWHITESPACES);
+ AddWord(nWidth, aCurrentLine, aWordBoundary.startPos, rpFont);
+
+ // Remember the new word boundary for caret travelling by words.
+ // Prevent duplicates.
+ if (aWordBoundary.startPos > maWordBoundaries.back())
+ maWordBoundaries.push_back(aWordBoundary.startPos);
+
+ if (aWordBoundary.endPos>aWordBoundary.startPos)
+ AddWord(nWidth, aCurrentLine, aWordBoundary.endPos, rpFont);
+
+ if (aWordBoundary.startPos<0 || aWordBoundary.endPos<0)
+ break;
+ if (nPosition >= aWordBoundary.endPos)
+ break;
+ nPosition = aWordBoundary.endPos;
+ }
+
+ if (aCurrentLine.endPos>aCurrentLine.startPos)
+ AddLine(aCurrentLine);
+
+}
+
+sal_Int32 PresenterTextParagraph::GetWordBoundary(
+ const sal_Int32 nLocalCharacterIndex,
+ const sal_Int32 nDistance)
+{
+ OSL_ASSERT(nDistance==-1 || nDistance==+1);
+
+ if (nLocalCharacterIndex < 0)
+ {
+ // The caller asked for the start or end position of the paragraph.
+ if (nDistance < 0)
+ return 0;
+ else
+ return GetCharacterCount();
+ }
+
+ sal_Int32 nIndex (0);
+ for (sal_Int32 nCount (maWordBoundaries.size()); nIndex<nCount; ++nIndex)
+ {
+ if (maWordBoundaries[nIndex] >= nLocalCharacterIndex)
+ {
+ // When inside the word (not at its start or end) then
+ // first move to the start or end before going the previous or
+ // next word.
+ if (maWordBoundaries[nIndex] > nLocalCharacterIndex)
+ if (nDistance > 0)
+ --nIndex;
+ break;
+ }
+ }
+
+ nIndex += nDistance;
+
+ if (nIndex < 0)
+ return -1;
+ else if (o3tl::make_unsigned(nIndex)>=maWordBoundaries.size())
+ return -1;
+ else
+ return maWordBoundaries[nIndex];
+}
+
+sal_Int32 PresenterTextParagraph::GetCaretPosition() const
+{
+ if (mpCaret && mpCaret->GetParagraphIndex()==mnParagraphIndex)
+ return mpCaret->GetCharacterIndex();
+ else
+ return -1;
+}
+
+void PresenterTextParagraph::SetCaretPosition (const sal_Int32 nPosition) const
+{
+ if (mpCaret && mpCaret->GetParagraphIndex()==mnParagraphIndex)
+ return mpCaret->SetPosition(mnParagraphIndex, nPosition);
+}
+
+void PresenterTextParagraph::SetOrigin (const double nXOrigin, const double nYOrigin)
+{
+ mnXOrigin = nXOrigin;
+ mnYOrigin = nYOrigin;
+}
+
+awt::Point PresenterTextParagraph::GetRelativeLocation() const
+{
+ return awt::Point(
+ sal_Int32(mnXOrigin),
+ sal_Int32(mnYOrigin + mnVerticalOffset));
+}
+
+awt::Size PresenterTextParagraph::GetSize() const
+{
+ return awt::Size(
+ sal_Int32(mnWidth),
+ sal_Int32(GetTotalTextHeight()));
+}
+
+void PresenterTextParagraph::AddWord (
+ const double nWidth,
+ i18n::Boundary& rCurrentLine,
+ const sal_Int32 nWordBoundary,
+ const PresenterTheme::SharedFontDescriptor& rpFont)
+{
+ sal_Int32 nLineStart (0);
+ if ( ! maLines.empty())
+ nLineStart = rCurrentLine.startPos;
+
+ const OUString sLineCandidate (
+ msParagraphText.copy(nLineStart, nWordBoundary-nLineStart));
+
+ css::geometry::RealRectangle2D aLineBox (
+ PresenterCanvasHelper::GetTextBoundingBox (
+ rpFont->mxFont,
+ sLineCandidate,
+ mnWritingMode));
+ const double nLineWidth (aLineBox.X2 - aLineBox.X1);
+
+ if (nLineWidth >= nWidth)
+ {
+ // Add new line with a single word (so far).
+ AddLine(rCurrentLine);
+ }
+ rCurrentLine.endPos = nWordBoundary;
+}
+
+void PresenterTextParagraph::AddLine (
+ i18n::Boundary& rCurrentLine)
+{
+ Line aLine (rCurrentLine.startPos, rCurrentLine.endPos);
+
+ // Find the start and end of the line with respect to cells.
+ if (!maLines.empty())
+ {
+ aLine.mnLineStartCellIndex = maLines.back().mnLineEndCellIndex;
+ aLine.mnBaseLine = maLines.back().mnBaseLine + mnLineHeight;
+ }
+ else
+ {
+ aLine.mnLineStartCellIndex = 0;
+ aLine.mnBaseLine = mnVerticalOffset + mnAscent;
+ }
+ sal_Int32 nCellIndex (aLine.mnLineStartCellIndex);
+ double nWidth (0);
+ for ( ; nCellIndex<sal_Int32(maCells.size()); ++nCellIndex)
+ {
+ const Cell& rCell (maCells[nCellIndex]);
+ if (rCell.mnCharacterIndex+rCell.mnCharacterCount > aLine.mnLineEndCharacterIndex)
+ break;
+ nWidth += rCell.mnCellWidth;
+ }
+ aLine.mnLineEndCellIndex = nCellIndex;
+ aLine.mnWidth = nWidth;
+
+ maLines.push_back(aLine);
+
+ rCurrentLine.startPos = rCurrentLine.endPos;
+}
+
+double PresenterTextParagraph::GetTotalTextHeight() const
+{
+ return maLines.size() * mnLineHeight;
+}
+
+void PresenterTextParagraph::SetCharacterOffset (const sal_Int32 nCharacterOffset)
+{
+ mnCharacterOffset = nCharacterOffset;
+}
+
+sal_Int32 PresenterTextParagraph::GetCharacterCount() const
+{
+ return msParagraphText.getLength();
+}
+
+sal_Unicode PresenterTextParagraph::GetCharacter (
+ const sal_Int32 nGlobalCharacterIndex) const
+{
+ if (nGlobalCharacterIndex<mnCharacterOffset
+ || nGlobalCharacterIndex>=mnCharacterOffset+msParagraphText.getLength())
+ {
+ return sal_Unicode();
+ }
+ else
+ {
+ return msParagraphText[nGlobalCharacterIndex - mnCharacterOffset];
+ }
+}
+
+const OUString& PresenterTextParagraph::GetText() const
+{
+ return msParagraphText;
+}
+
+TextSegment PresenterTextParagraph::GetTextSegment (
+ const sal_Int32 nOffset,
+ const sal_Int32 nIndex,
+ const sal_Int16 nTextType) const
+{
+ switch(nTextType)
+ {
+ case AccessibleTextType::PARAGRAPH:
+ return TextSegment(
+ msParagraphText,
+ mnCharacterOffset,
+ mnCharacterOffset+msParagraphText.getLength());
+
+ case AccessibleTextType::SENTENCE:
+ if (mxBreakIterator.is())
+ {
+ const sal_Int32 nStart (mxBreakIterator->beginOfSentence(
+ msParagraphText, nIndex-mnCharacterOffset, lang::Locale()));
+ const sal_Int32 nEnd (mxBreakIterator->endOfSentence(
+ msParagraphText, nIndex-mnCharacterOffset, lang::Locale()));
+ if (nStart < nEnd)
+ return TextSegment(
+ msParagraphText.copy(nStart, nEnd-nStart),
+ nStart+mnCharacterOffset,
+ nEnd+mnCharacterOffset);
+ }
+ break;
+
+ case AccessibleTextType::WORD:
+ if (mxBreakIterator.is())
+ return GetWordTextSegment(nOffset, nIndex);
+ break;
+
+ case AccessibleTextType::LINE:
+ {
+ auto iLine = std::find_if(maLines.begin(), maLines.end(),
+ [nIndex](const Line& rLine) { return nIndex < rLine.mnLineEndCharacterIndex; });
+ if (iLine != maLines.end())
+ {
+ return TextSegment(
+ msParagraphText.copy(
+ iLine->mnLineStartCharacterIndex,
+ iLine->mnLineEndCharacterIndex - iLine->mnLineStartCharacterIndex),
+ iLine->mnLineStartCharacterIndex,
+ iLine->mnLineEndCharacterIndex);
+ }
+ }
+ break;
+
+ // Handle GLYPH and ATTRIBUTE_RUN like CHARACTER because we can not
+ // do better at the moment.
+ case AccessibleTextType::CHARACTER:
+ case AccessibleTextType::GLYPH:
+ case AccessibleTextType::ATTRIBUTE_RUN:
+ return CreateTextSegment(nIndex+nOffset, nIndex+nOffset+1);
+ }
+
+ return TextSegment(OUString(), 0,0);
+}
+
+TextSegment PresenterTextParagraph::GetWordTextSegment (
+ const sal_Int32 nOffset,
+ const sal_Int32 nIndex) const
+{
+ sal_Int32 nCurrentOffset (nOffset);
+ sal_Int32 nCurrentIndex (nIndex);
+
+ i18n::Boundary aWordBoundary;
+ if (nCurrentOffset == 0)
+ aWordBoundary = mxBreakIterator->getWordBoundary(
+ msParagraphText,
+ nIndex,
+ lang::Locale(),
+ i18n::WordType::ANYWORD_IGNOREWHITESPACES,
+ true);
+ else if (nCurrentOffset < 0)
+ {
+ while (nCurrentOffset<0 && nCurrentIndex>0)
+ {
+ aWordBoundary = mxBreakIterator->previousWord(
+ msParagraphText,
+ nCurrentIndex,
+ lang::Locale(),
+ i18n::WordType::ANYWORD_IGNOREWHITESPACES);
+ nCurrentIndex = aWordBoundary.startPos;
+ ++nCurrentOffset;
+ }
+ }
+ else
+ {
+ while (nCurrentOffset>0 && nCurrentIndex<=GetCharacterCount())
+ {
+ aWordBoundary = mxBreakIterator->nextWord(
+ msParagraphText,
+ nCurrentIndex,
+ lang::Locale(),
+ i18n::WordType::ANYWORD_IGNOREWHITESPACES);
+ nCurrentIndex = aWordBoundary.endPos;
+ --nCurrentOffset;
+ }
+ }
+
+ return CreateTextSegment(aWordBoundary.startPos, aWordBoundary.endPos);
+}
+
+TextSegment PresenterTextParagraph::CreateTextSegment (
+ sal_Int32 nStartIndex,
+ sal_Int32 nEndIndex) const
+{
+ if (nEndIndex <= nStartIndex)
+ return TextSegment(
+ OUString(),
+ nStartIndex,
+ nEndIndex);
+ else
+ return TextSegment(
+ msParagraphText.copy(nStartIndex, nEndIndex-nStartIndex),
+ nStartIndex,
+ nEndIndex);
+}
+
+awt::Rectangle PresenterTextParagraph::GetCharacterBounds (
+ sal_Int32 nGlobalCharacterIndex,
+ const bool bCaretBox)
+{
+ // Find the line that contains the requested character and accumulate
+ // the previous line heights.
+ double nX (mnXOrigin);
+ double nY (mnYOrigin + mnVerticalOffset + mnAscent);
+ const sal_Int8 nTextDirection (GetTextDirection());
+ for (sal_Int32 nLineIndex=0,nLineCount=maLines.size();
+ nLineIndex<nLineCount;
+ ++nLineIndex, nY+=mnLineHeight)
+ {
+ Line& rLine (maLines[nLineIndex]);
+ // Skip lines before the indexed character.
+ if (nGlobalCharacterIndex >= rLine.mnLineEndCharacterIndex)
+ // When in the last line then allow the index past the last char.
+ if (nLineIndex<nLineCount-1)
+ continue;
+
+ rLine.ProvideCellBoxes();
+
+ const sal_Int32 nCellIndex (nGlobalCharacterIndex - rLine.mnLineStartCharacterIndex);
+
+ // The cell bounding box is defined relative to the origin of
+ // the current line. Therefore we have to add the absolute
+ // position of the line.
+ geometry::RealRectangle2D rCellBox (rLine.maCellBoxes[
+ ::std::min(nCellIndex, rLine.maCellBoxes.getLength()-1)]);
+
+ double nLeft = nX + rCellBox.X1;
+ double nRight = nX + rCellBox.X2;
+ if (nTextDirection == rendering::TextDirection::WEAK_RIGHT_TO_LEFT)
+ {
+ const double nOldRight (nRight);
+ nRight = rLine.mnWidth - nLeft;
+ nLeft = rLine.mnWidth - nOldRight;
+ }
+ double nTop = nY - mnAscent;
+ double nBottom;
+ if (bCaretBox)
+ {
+ nBottom = nTop + mnLineHeight;
+ if (nCellIndex >= rLine.maCellBoxes.getLength())
+ nLeft = nRight-2;
+ if (nLeft < nX)
+ nLeft = nX;
+ nRight = nLeft+2;
+ }
+ else
+ {
+ nBottom = nTop + mnAscent + mnDescent;
+ }
+ const sal_Int32 nX1 = sal_Int32(floor(nLeft));
+ const sal_Int32 nY1 = sal_Int32(floor(nTop));
+ const sal_Int32 nX2 = sal_Int32(ceil(nRight));
+ const sal_Int32 nY2 = sal_Int32(ceil(nBottom));
+
+ return awt::Rectangle(nX1,nY1,nX2-nX1+1,nY2-nY1+1);
+ }
+
+ // We are still here. That means that the given index lies past the
+ // last character in the paragraph.
+ // Return an empty box that lies past the last character. Better than nothing.
+ return awt::Rectangle(sal_Int32(nX+0.5), sal_Int32(nY+0.5), 0, 0);
+}
+
+sal_Int8 PresenterTextParagraph::GetTextDirection() const
+{
+ // Find first portion that has a non-neutral text direction.
+ sal_Int32 nPosition (0);
+ sal_Int32 nTextLength (msParagraphText.getLength());
+ while (nPosition < nTextLength)
+ {
+ const sal_Int16 nScriptDirection (
+ mxScriptTypeDetector->getScriptDirection(
+ msParagraphText, nPosition, i18n::ScriptDirection::NEUTRAL));
+ switch (nScriptDirection)
+ {
+ case i18n::ScriptDirection::NEUTRAL:
+ // continue looping.
+ break;
+ case i18n::ScriptDirection::LEFT_TO_RIGHT:
+ return rendering::TextDirection::WEAK_LEFT_TO_RIGHT;
+
+ case i18n::ScriptDirection::RIGHT_TO_LEFT:
+ return rendering::TextDirection::WEAK_RIGHT_TO_LEFT;
+ }
+
+ nPosition = mxScriptTypeDetector->endOfScriptDirection(
+ msParagraphText, nPosition, nScriptDirection);
+ }
+
+ // All text in paragraph is neutral. Fall back on writing mode taken
+ // from the XText (which may not be properly initialized.)
+ sal_Int8 nTextDirection(rendering::TextDirection::WEAK_LEFT_TO_RIGHT);
+ switch(mnWritingMode)
+ {
+ case text::WritingMode2::LR_TB:
+ nTextDirection = rendering::TextDirection::WEAK_LEFT_TO_RIGHT;
+ break;
+
+ case text::WritingMode2::RL_TB:
+ nTextDirection = rendering::TextDirection::WEAK_RIGHT_TO_LEFT;
+ break;
+
+ default:
+ case text::WritingMode2::TB_RL:
+ case text::WritingMode2::TB_LR:
+ // Can not handle this. Use default and hope for the best.
+ break;
+ }
+ return nTextDirection;
+}
+
+bool PresenterTextParagraph::IsTextReferencePointLeft() const
+{
+ return mnWritingMode != text::WritingMode2::RL_TB;
+}
+
+void PresenterTextParagraph::SetupCellArray (
+ const PresenterTheme::SharedFontDescriptor& rpFont)
+{
+ maCells.clear();
+
+ if ( ! rpFont || ! rpFont->mxFont.is())
+ return;
+
+ sal_Int32 nPosition (0);
+ sal_Int32 nIndex (0);
+ const sal_Int32 nTextLength (msParagraphText.getLength());
+ const sal_Int8 nTextDirection (GetTextDirection());
+ while (nPosition < nTextLength)
+ {
+ const sal_Int32 nNewPosition (mxBreakIterator->nextCharacters(
+ msParagraphText,
+ nPosition,
+ lang::Locale(),
+ i18n::CharacterIteratorMode::SKIPCELL,
+ 1,
+ nIndex));
+
+ rendering::StringContext aContext (msParagraphText, nPosition, nNewPosition-nPosition);
+ Reference<rendering::XTextLayout> xLayout (
+ rpFont->mxFont->createTextLayout(aContext, nTextDirection, 0));
+ css::geometry::RealRectangle2D aCharacterBox (xLayout->queryTextBounds());
+
+ maCells.emplace_back(
+ nPosition,
+ nNewPosition-nPosition,
+ aCharacterBox.X2-aCharacterBox.X1);
+
+ nPosition = nNewPosition;
+ }
+}
+
+//===== PresenterTextCaret ================================================----
+
+PresenterTextCaret::PresenterTextCaret (
+ uno::Reference<uno::XComponentContext> const& xContext,
+ const ::std::function<css::awt::Rectangle (const sal_Int32,const sal_Int32)>& rCharacterBoundsAccess,
+ const ::std::function<void (const css::awt::Rectangle&)>& rInvalidator)
+ : m_xContext(xContext)
+ , mnParagraphIndex(-1),
+ mnCharacterIndex(-1),
+ mnCaretBlinkTaskId(0),
+ mbIsCaretVisible(false),
+ maCharacterBoundsAccess(rCharacterBoundsAccess),
+ maInvalidator(rInvalidator),
+ maBroadcaster(),
+ maCaretBounds()
+{
+}
+
+PresenterTextCaret::~PresenterTextCaret()
+{
+ try
+ {
+ HideCaret();
+ }
+ catch (uno::Exception const&)
+ {
+ TOOLS_WARN_EXCEPTION("sdext.presenter", "unexpected exception in ~PresenterTextCaret");
+ }
+}
+
+void PresenterTextCaret::ShowCaret()
+{
+ if (mnCaretBlinkTaskId == 0)
+ {
+ mnCaretBlinkTaskId = PresenterTimer::ScheduleRepeatedTask (
+ m_xContext,
+ [this] (TimeValue const&) { return this->InvertCaret(); },
+ CaretBlinkInterval,
+ CaretBlinkInterval);
+ }
+ mbIsCaretVisible = true;
+}
+
+void PresenterTextCaret::HideCaret()
+{
+ if (mnCaretBlinkTaskId != 0)
+ {
+ PresenterTimer::CancelTask(mnCaretBlinkTaskId);
+ mnCaretBlinkTaskId = 0;
+ }
+ mbIsCaretVisible = false;
+ // Reset the caret position.
+ mnParagraphIndex = -1;
+ mnCharacterIndex = -1;
+}
+
+
+void PresenterTextCaret::SetPosition (
+ const sal_Int32 nParagraphIndex,
+ const sal_Int32 nCharacterIndex)
+{
+ if (mnParagraphIndex == nParagraphIndex
+ && mnCharacterIndex == nCharacterIndex)
+ return;
+
+ if (mnParagraphIndex >= 0)
+ maInvalidator(maCaretBounds);
+
+ const sal_Int32 nOldParagraphIndex (mnParagraphIndex);
+ const sal_Int32 nOldCharacterIndex (mnCharacterIndex);
+ mnParagraphIndex = nParagraphIndex;
+ mnCharacterIndex = nCharacterIndex;
+ maCaretBounds = maCharacterBoundsAccess(mnParagraphIndex, mnCharacterIndex);
+ if (mnParagraphIndex >= 0)
+ ShowCaret();
+ else
+ HideCaret();
+
+ if (mnParagraphIndex >= 0)
+ maInvalidator(maCaretBounds);
+
+ if (maBroadcaster)
+ maBroadcaster(
+ nOldParagraphIndex,
+ nOldCharacterIndex,
+ mnParagraphIndex,
+ mnCharacterIndex);
+}
+
+
+void PresenterTextCaret::SetCaretMotionBroadcaster (
+ const ::std::function<void (sal_Int32,sal_Int32,sal_Int32,sal_Int32)>& rBroadcaster)
+{
+ maBroadcaster = rBroadcaster;
+}
+
+const css::awt::Rectangle& PresenterTextCaret::GetBounds() const
+{
+ return maCaretBounds;
+}
+
+void PresenterTextCaret::InvertCaret()
+{
+ mbIsCaretVisible = !mbIsCaretVisible;
+ if (mnParagraphIndex >= 0)
+ maInvalidator(maCaretBounds);
+}
+
+//===== PresenterTextParagraph::Cell ==========================================
+
+PresenterTextParagraph::Cell::Cell (
+ const sal_Int32 nCharacterIndex,
+ const sal_Int32 nCharacterCount,
+ const double nCellWidth)
+ : mnCharacterIndex(nCharacterIndex),
+ mnCharacterCount(nCharacterCount),
+ mnCellWidth(nCellWidth)
+{
+}
+
+//===== PresenterTextParagraph::Line ==========================================
+
+PresenterTextParagraph::Line::Line (
+ const sal_Int32 nLineStartCharacterIndex,
+ const sal_Int32 nLineEndCharacterIndex)
+ : mnLineStartCharacterIndex(nLineStartCharacterIndex),
+ mnLineEndCharacterIndex(nLineEndCharacterIndex),
+ mnLineStartCellIndex(-1), mnLineEndCellIndex(-1),
+ mxLayoutedLine(),
+ mnBaseLine(0), mnWidth(0),
+ maCellBoxes()
+{
+}
+
+void PresenterTextParagraph::Line::ProvideCellBoxes()
+{
+ if ( mnLineStartCharacterIndex < mnLineEndCharacterIndex && !maCellBoxes.hasElements() )
+ {
+ if (mxLayoutedLine.is())
+ maCellBoxes = mxLayoutedLine->queryInkMeasures();
+ else
+ {
+ OSL_ASSERT(mxLayoutedLine.is());
+ }
+ }
+}
+
+void PresenterTextParagraph::Line::ProvideLayoutedLine (
+ const OUString& rsParagraphText,
+ const PresenterTheme::SharedFontDescriptor& rpFont,
+ const sal_Int8 nTextDirection)
+{
+ if ( ! mxLayoutedLine.is())
+ {
+ const rendering::StringContext aContext (
+ rsParagraphText,
+ mnLineStartCharacterIndex,
+ mnLineEndCharacterIndex - mnLineStartCharacterIndex);
+
+ mxLayoutedLine = rpFont->mxFont->createTextLayout(
+ aContext,
+ nTextDirection,
+ 0);
+ }
+}
+
+} // end of namespace ::sdext::presenter
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */