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author | Timothy Pearson <[email protected]> | 2011-11-06 15:56:40 -0600 |
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committer | Timothy Pearson <[email protected]> | 2011-11-06 15:56:40 -0600 |
commit | e16866e072f94410321d70daedbcb855ea878cac (patch) | |
tree | ee3f52eabde7da1a0e6ca845fb9c2813cf1558cf /tdeui/kwordwrap.cpp | |
parent | a58c20c1a7593631a1b50213c805507ebc16adaf (diff) | |
download | tdelibs-e16866e072f94410321d70daedbcb855ea878cac.tar.gz tdelibs-e16866e072f94410321d70daedbcb855ea878cac.zip |
Actually move the kde files that were renamed in the last commit
Diffstat (limited to 'tdeui/kwordwrap.cpp')
-rw-r--r-- | tdeui/kwordwrap.cpp | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/tdeui/kwordwrap.cpp b/tdeui/kwordwrap.cpp new file mode 100644 index 000000000..b7eeaff7c --- /dev/null +++ b/tdeui/kwordwrap.cpp @@ -0,0 +1,269 @@ +/* This file is part of the KDE libraries + Copyright (C) 2001 David Faure <[email protected]> + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License version 2 as published by the Free Software Foundation. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#include "kwordwrap.h" +#include <kdebug.h> +#include <kstringhandler.h> +#include <tqpainter.h> + +class KWordWrapPrivate { +public: + TQRect m_constrainingRect; +}; + +KWordWrap::KWordWrap(const TQRect & r) { + d = new KWordWrapPrivate; + d->m_constrainingRect = r; +} + +KWordWrap* KWordWrap::formatText( TQFontMetrics &fm, const TQRect & r, int /*flags*/, const TQString & str, int len ) +{ + KWordWrap* kw = new KWordWrap( r ); + // The wordwrap algorithm + // The variable names and the global tqshape of the algorithm are inspired + // from QTextFormatterBreakWords::format(). + //kdDebug() << "KWordWrap::formatText " << str << " r=" << r.x() << "," << r.y() << " " << r.width() << "x" << r.height() << endl; + int height = fm.height(); + if ( len == -1 ) + kw->m_text = str; + else + kw->m_text = str.left( len ); + if ( len == -1 ) + len = str.length(); + int lastBreak = -1; + int lineWidth = 0; + int x = 0; + int y = 0; + int w = r.width(); + int textwidth = 0; + bool isBreakable = false; + bool wasBreakable = false; // value of isBreakable for last char (i-1) + bool isParens = false; // true if one of ({[ + bool wasParens = false; // value of isParens for last char (i-1) + + for ( int i = 0 ; i < len; ++i ) + { + TQChar c = str[i]; + int ww = fm.charWidth( str, i ); + + isParens = ( c == '(' || c == '[' || c == '{' ); + // isBreakable is true when we can break _after_ this character. + isBreakable = ( c.isSpace() || c.isPunct() || c.isSymbol() ) & !isParens; + + // Special case for '(', '[' and '{': we want to break before them + if ( !isBreakable && i < len-1 ) { + TQChar nextc = str[i+1]; // look at next char + isBreakable = ( nextc == '(' || nextc == '[' || nextc == '{' ); + } + // Special case for '/': after normal chars it's breakable (e.g. inside a path), + // but after another breakable char it's not (e.g. "mounted at /foo") + // Same thing after a parenthesis (e.g. "dfaure [/fool]") + if ( c == '/' && (wasBreakable || wasParens) ) + isBreakable = false; + + /*kdDebug() << "c='" << TQString(c) << "' i=" << i << "/" << len + << " x=" << x << " ww=" << ww << " w=" << w + << " lastBreak=" << lastBreak << " isBreakable=" << isBreakable << endl;*/ + int breakAt = -1; + if ( x + ww > w && lastBreak != -1 ) // time to break and we know where + breakAt = lastBreak; + if ( x + ww > w - 4 && lastBreak == -1 ) // time to break but found nowhere [-> break here] + breakAt = i; + if ( i == len - 2 && x + ww + fm.charWidth( str, i+1 ) > w ) // don't leave the last char alone + breakAt = lastBreak == -1 ? i - 1 : lastBreak; + if ( c == '\n' ) // Forced break here + { + if ( breakAt == -1 && lastBreak != -1) // only break if not already breaking + { + breakAt = i - 1; + lastBreak = -1; + } + // remove the line feed from the string + kw->m_text.remove(i, 1); + len--; + } + if ( breakAt != -1 ) + { + //kdDebug() << "KWordWrap::formatText breaking after " << breakAt << endl; + kw->m_breakPositions.append( breakAt ); + int thisLineWidth = lastBreak == -1 ? x + ww : lineWidth; + kw->m_lineWidths.append( thisLineWidth ); + textwidth = QMAX( textwidth, thisLineWidth ); + x = 0; + y += height; + wasBreakable = true; + wasParens = false; + if ( lastBreak != -1 ) + { + // Breakable char was found, restart from there + i = lastBreak; + lastBreak = -1; + continue; + } + } else if ( isBreakable ) + { + lastBreak = i; + lineWidth = x + ww; + } + x += ww; + wasBreakable = isBreakable; + wasParens = isParens; + } + textwidth = QMAX( textwidth, x ); + kw->m_lineWidths.append( x ); + y += height; + //kdDebug() << "KWordWrap::formatText boundingRect:" << r.x() << "," << r.y() << " " << textwidth << "x" << y << endl; + if ( r.height() >= 0 && y > r.height() ) + textwidth = r.width(); + int realY = y; + if ( r.height() >= 0 ) + { + while ( realY > r.height() ) + realY -= height; + realY = QMAX( realY, 0 ); + } + kw->m_boundingRect.setRect( 0, 0, textwidth, realY ); + return kw; +} + +KWordWrap::~KWordWrap() { + delete d; +} + +TQString KWordWrap::wrappedString() const +{ + // We use the calculated break positions to insert '\n' into the string + TQString ws; + int start = 0; + TQValueList<int>::ConstIterator it = m_breakPositions.begin(); + for ( ; it != m_breakPositions.end() ; ++it ) + { + int end = (*it); + ws += m_text.mid( start, end - start + 1 ) + '\n'; + start = end + 1; + } + ws += m_text.mid( start ); + return ws; +} + +TQString KWordWrap::truncatedString( bool dots ) const +{ + if ( m_breakPositions.isEmpty() ) + return m_text; + + TQString ts = m_text.left( m_breakPositions.first() + 1 ); + if ( dots ) + ts += "..."; + return ts; +} + +static TQColor mixColors(double p1, TQColor c1, TQColor c2) { + return TQColor(int(c1.red() * p1 + c2.red() * (1.0-p1)), + int(c1.green() * p1 + c2.green() * (1.0-p1)), + int(c1.blue() * p1 + c2.blue() * (1.0-p1))); +} + +void KWordWrap::drawFadeoutText(TQPainter *p, int x, int y, int maxW, + const TQString &t) { + TQFontMetrics fm = p->fontMetrics(); + TQColor bgColor = p->backgroundColor(); + TQColor textColor = p->pen().color(); + + if ( ( fm.boundingRect( t ).width() > maxW ) && ( t.length() > 1 ) ) { + unsigned int tl = 0; + int w = 0; + while ( tl < t.length() ) { + w += fm.charWidth( t, tl ); + if ( w >= maxW ) + break; + tl++; + } + + if (tl > 3) { + p->drawText( x, y, t.left( tl - 3 ) ); + x += fm.width( t.left( tl - 3 ) ); + } + int n = TQMIN( tl, 3); + for (int i = 0; i < n; i++) { + p->setPen( mixColors( 0.70 - i * 0.25, textColor, bgColor ) ); + TQString s( t.tqat( tl - n + i ) ); + p->drawText( x, y, s ); + x += fm.width( s ); + } + } + else + p->drawText( x, y, t ); +} + +void KWordWrap::drawTruncateText(TQPainter *p, int x, int y, int maxW, + const TQString &t) { + TQString tmpText = KStringHandler::rPixelSqueeze( t, p->fontMetrics(), maxW ); + p->drawText( x, y, tmpText, maxW ); +} + +void KWordWrap::drawText( TQPainter *painter, int textX, int textY, int flags ) const +{ + //kdDebug() << "KWordWrap::drawText text=" << wrappedString() << " x=" << textX << " y=" << textY << endl; + // We use the calculated break positions to draw the text line by line using QPainter + int start = 0; + int y = 0; + TQFontMetrics fm = painter->fontMetrics(); + int height = fm.height(); // line height + int ascent = fm.ascent(); + int maxwidth = m_boundingRect.width(); + TQValueList<int>::ConstIterator it = m_breakPositions.begin(); + TQValueList<int>::ConstIterator itw = m_lineWidths.begin(); + for ( ; it != m_breakPositions.end() ; ++it, ++itw ) + { + // if this is the last line, leave the loop + if ( (d->m_constrainingRect.height() >= 0) && + ((y + 2 * height) > d->m_constrainingRect.height()) ) + break; + int end = (*it); + int x = textX; + if ( flags & Qt::AlignHCenter ) + x += ( maxwidth - *itw ) / 2; + else if ( flags & Qt::AlignRight ) + x += maxwidth - *itw; + painter->drawText( x, textY + y + ascent, m_text.mid( start, end - start + 1 ) ); + y += height; + start = end + 1; + } + // Draw the last line + int x = textX; + if ( flags & Qt::AlignHCenter ) + x += ( maxwidth - *itw ) / 2; + else if ( flags & Qt::AlignRight ) + x += maxwidth - *itw; + if ( (d->m_constrainingRect.height() < 0) || + ((y + height) <= d->m_constrainingRect.height()) ) { + if ( it == m_breakPositions.end() ) + painter->drawText( x, textY + y + ascent, m_text.mid( start ) ); + else if (flags & FadeOut) + drawFadeoutText( painter, textX, textY + y + ascent, + d->m_constrainingRect.width(), + m_text.mid( start ) ); + else if (flags & Truncate) + drawTruncateText( painter, textX, textY + y + ascent, + d->m_constrainingRect.width(), + m_text.mid( start ) ); + else + painter->drawText( x, textY + y + ascent, + m_text.mid( start, (*it) - start + 1 ) ); + } +} |