add and LyXText::undoSpan to compute the influence of a layout change.

Fix Bug 578.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8331 a592a061-630c-0410-9148-cb99ea01b6c8

src/ChangeLog

@@ -1,3 +1,8 @@
+2004-01-08  Alfredo Braunstein  <abraunst@lyx.org>
+
+	* text2.C (undoSpan): add and use
+	* text.C (breakParagraph): use undoSpan (fix bug 578)
+	* lyxtext.h: adjust
 
 2004-01-08  Angus Leeming  <leeming@lyx.org>
 

src/lyxtext.h

@@ -441,6 +441,10 @@ public:
 
 
 private:
+	/// return past-the-last paragraph influenced by a layout
+	/// change on pit
+	ParagraphList::iterator undoSpan(ParagraphList::iterator pit);
+	
 	/// rebreaks the given par
 	void redoParagraphInternal(ParagraphList::iterator pit);
 	/// used in setlayout

src/text.C

@@ -596,9 +596,10 @@ void LyXText::setHeightOfRow(ParagraphList::iterator pit, Row & row)
 	// are taken from the layoutfont. Nicer on the screen :)
 	LyXLayout_ptr const & layout = pit->layout();
 
-	// as max get the first character of this row then it can increase but not
-	// decrease the height. Just some point to start with so we don't have to
-	// do the assignment below too often.
+	// as max get the first character of this row then it can
+	// increase but not decrease the height. Just some point to
+	// start with so we don't have to do the assignment below too
+	// often.
 	LyXFont font = getFont(pit, row.pos());
 	LyXFont::FONT_SIZE const tmpsize = font.size();
 	font = getLayoutFont(pit);
@@ -760,16 +761,16 @@ void LyXText::breakParagraph(ParagraphList & paragraphs, char keep_layout)
 		bv()->buffer()->params().getLyXTextClass();
 	LyXLayout_ptr const & layout = cpit->layout();
 
-	// this is only allowed, if the current paragraph is not empty or caption
-	// and if it has not the keepempty flag active
+	// this is only allowed, if the current paragraph is not empty
+	// or caption and if it has not the keepempty flag active
 	if (cpit->empty() && !cpit->allowEmpty()
 	   && layout->labeltype != LABEL_SENSITIVE)
 		return;
 
-	recUndo(cursor.par());
+	// a layout change may affect also the following paragraph
+	recUndo(cursor.par(), parOffset(undoSpan(cpit)) - 1);
 
 	// Always break behind a space
-	//
 	// It is better to erase the space (Dekel)
 	if (cursor.pos() < cpit->size() && cpit->isLineSeparator(cursor.pos()))
 		cpit->erase(cursor.pos());
@@ -1289,8 +1290,9 @@ void LyXText::backspace()
 	pos_type lastpos = pit->size();
 
 	if (cursor.pos() == 0) {
-		// The cursor is at the beginning of a paragraph,
-		// so the the backspace will collapse two paragraphs into one.
+		// The cursor is at the beginning of a paragraph, so
+		// the the backspace will collapse two paragraphs into
+		// one.
 
 		// but it's not allowed unless it's new
 		if (pit->isChangeEdited(0, pit->size()))
@@ -1299,7 +1301,6 @@ void LyXText::backspace()
 		// we may paste some paragraphs
 
 		// is it an empty paragraph?
-
 		if (lastpos == 0 || (lastpos == 1 && pit->isSeparator(0))) {
 			// This is an empty paragraph and we delete it just
 			// by moving the cursor one step

src/text2.C

@@ -268,19 +268,33 @@ void LyXText::makeFontEntriesLayoutSpecific(BufferParams const & params,
 }
 
 
+// return past-the-last paragraph influenced by a layout change on pit
+ParagraphList::iterator
+LyXText::undoSpan(ParagraphList::iterator pit)
+{
+	ParagraphList::iterator end = paragraphs().end();
+	ParagraphList::iterator nextpit = boost::next(pit);
+	if (nextpit == end)
+		return nextpit;
+	//because of parindents
+	if (!pit->getDepth())
+		return boost::next(nextpit);
+	//because of depth constrains
+	for (; nextpit != end; ++pit, ++nextpit) {
+		if (!pit->getDepth())
+			break;
+	}
+	return nextpit;
+}
+
+
 ParagraphList::iterator
 LyXText::setLayout(ParagraphList::iterator start,
 		   ParagraphList::iterator end,
 		   string const & layout)
 {
-	ParagraphList::iterator undopit = end;
-	ParagraphList::iterator pars_end = paragraphs().end();
-
-	while (undopit != pars_end && undopit->getDepth())
-		++undopit;
-	//because of parindets etc
-	if (undopit != pars_end)
-		++undopit;
+	BOOST_ASSERT(start != end);
+	ParagraphList::iterator undopit = undoSpan(boost::prior(end));
 	recUndo(parOffset(start), parOffset(undopit) - 1);
 
 	BufferParams const & bufparams = bv()->buffer()->params();
@@ -582,16 +596,8 @@ void LyXText::setParagraph(Spacing const & spacing, LyXAlignment align,
 	string const & labelwidthstring, bool noindent)
 {
 	// make sure that the depth behind the selection are restored, too
-	ParagraphList::iterator endpit = boost::next(getPar(selEnd()));
-	ParagraphList::iterator pars_end = paragraphs().end();
-
-	while (endpit != pars_end && endpit->getDepth())
-		++endpit;
-	// because of parindents etc.
-	if (endpit != pars_end)
-		++endpit;
-
-	recUndo(selStart().par(), parOffset(endpit) - 1);
+	ParagraphList::iterator undopit = undoSpan(getPar(selEnd()));
+	recUndo(selStart().par(), parOffset(undopit) - 1);
 
 	ParagraphList::reverse_iterator pit(getPar(selEnd().par()));
 	ParagraphList::reverse_iterator beg(getPar(selStart().par()));
@@ -615,7 +621,7 @@ void LyXText::setParagraph(Spacing const & spacing, LyXAlignment align,
 		params.noindent(noindent);
 	}
 
-	redoParagraphs(getPar(selStart()), endpit);
+	redoParagraphs(getPar(selStart()), undopit);
 }
 
 
@@ -952,14 +958,7 @@ void LyXText::cutSelection(bool doclear, bool realcut)
 	// make sure that the depth behind the selection are restored, too
 	ParagraphList::iterator begpit = getPar(selStart().par());
 	ParagraphList::iterator endpit = getPar(selEnd().par());
-	ParagraphList::iterator undopit = boost::next(endpit);
-	ParagraphList::iterator pars_end = paragraphs().end();
-
-	while (undopit != pars_end && undopit->getDepth())
-		++undopit;
-	//because of parindents etc.
-	if (undopit != pars_end)
-		++undopit;
+	ParagraphList::iterator undopit = undoSpan(endpit);
 	recUndo(selStart().par(), parOffset(undopit) - 1);
 
 	int endpos = selEnd().pos();