branch: Fix bug #2213: GuiChanges? lacks "Previous Change" button.

see r29108, r29109, r29110, r29111, and r29115.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_6_X@30597 a592a061-630c-0410-9148-cb99ea01b6c8

src/BufferView.cpp

@@ -964,6 +964,7 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 
 	case LFUN_CHANGES_MERGE:
 	case LFUN_CHANGE_NEXT:
+	case LFUN_CHANGE_PREVIOUS:
 	case LFUN_ALL_CHANGES_ACCEPT:
 	case LFUN_ALL_CHANGES_REJECT:
 		// TODO: context-sensitive enabling of LFUNs
@@ -1210,9 +1211,15 @@ bool BufferView::dispatch(FuncRequest const & cmd)
 		// FIXME: Move this LFUN to Buffer so that we don't have to do this:
 		processUpdateFlags(Update::Force | Update::FitCursor);
 		break;
+	
+	case LFUN_CHANGE_PREVIOUS:
+		findPreviousChange(this);
+		// FIXME: Move this LFUN to Buffer so that we don't have to do this:
+		processUpdateFlags(Update::Force | Update::FitCursor);
+		break;
 
 	case LFUN_CHANGES_MERGE:
-		if (findNextChange(this)) {
+		if (findNextChange(this) || findPreviousChange(this)) {
 			processUpdateFlags(Update::Force | Update::FitCursor);
 			showDialog("changes");
 		}

src/Cursor.cpp

@@ -446,6 +446,12 @@ void Cursor::resetAnchor()
 }
 
 
+void Cursor::setCursorToAnchor()
+{
+	if (selection())
+		setCursor(anchor_);
+}
+
 
 bool Cursor::posBackward()
 {

src/Cursor.h

@@ -63,6 +63,8 @@ public:
 	void leaveInset(Inset const & inset);
 	/// sets cursor part
 	void setCursor(DocIterator const & it);
+	/// sets the cursor to the anchor
+	void setCursorToAnchor();
 
 	///
 	void setCurrentFont();

src/FuncCode.h

@@ -349,10 +349,10 @@ enum FuncCode
 	LFUN_PARAGRAPH_MOVE_UP,
 	// 265
 	LFUN_BUFFER_TOGGLE_COMPRESSION,  // bpeng 20060427
-	LFUN_MATH_BIGDELIM,
 	LFUN_CLIPBOARD_PASTE,
 	LFUN_INSET_DISSOLVE,             // jspitzm 20060807
 	LFUN_CHANGE_NEXT,
+	LFUN_CHANGE_PREVIOUS,            // vfr 20090404
 	// 270
 	LFUN_WINDOW_NEW,                 // Abdel 20061021
 	LFUN_WINDOW_CLOSE,               // Abdel 20061023
@@ -424,7 +424,7 @@ enum FuncCode
  	LFUN_INSET_BEGIN_SELECT,        // JMarc, 20090316
  	LFUN_INSET_END_SELECT,          // JMarc, 20090316
 	LFUN_VC_LOCKING_TOGGLE,
- 
+ 	LFUN_MATH_BIGDELIM,
 
 	LFUN_LASTACTION                  // end of the table
 };

src/LyXAction.cpp

@@ -2089,6 +2089,15 @@ void LyXAction::init()
  * \endvar
  */
 		{ LFUN_CHANGE_NEXT, "change-next", ReadOnly, Edit },
+/*!
+ * \var lyx::FuncCode lyx::LFUN_CHANGE_PREVIOUS
+ * \li Action: Moves the cursor to the position of the previous change
+               of the change tracking records.
+ * \li Syntax: change-previous
+ * \li Origin: vfr, 4 Apr 2009
+ * \endvar
+ */
+		{ LFUN_CHANGE_PREVIOUS, "change-previous", ReadOnly, Edit },
 /*!
  * \var lyx::FuncCode lyx::LFUN_CHANGES_MERGE
  * \li Action: Open change tracking dialog for merging and moves the cursor

src/frontends/qt4/GuiChanges.cpp

@@ -43,6 +43,7 @@ GuiChanges::GuiChanges(GuiView & lv)
 
 	connect(closePB, SIGNAL(clicked()), this, SLOT(slotClose()));
 	connect(nextPB, SIGNAL(clicked()), this, SLOT(nextChange()));
+	connect(previousPB, SIGNAL(clicked()), this, SLOT(previousChange()));
 	connect(rejectPB, SIGNAL(clicked()), this, SLOT(rejectChange()));
 	connect(acceptPB, SIGNAL(clicked()), this, SLOT(acceptChange()));
 
@@ -74,6 +75,12 @@ void GuiChanges::nextChange()
 }
 
 
+void GuiChanges::previousChange()
+{
+	dispatch(FuncRequest(LFUN_CHANGE_PREVIOUS));
+}
+
+
 docstring GuiChanges::changeDate() const
 {
 	Change const & c = bufferview()->getCurrentChange();

src/frontends/qt4/GuiChanges.h

@@ -35,6 +35,8 @@ protected Q_SLOTS:
 	void rejectChange();
 	/// find the next change and highlight it
 	void nextChange();
+	/// find the previous change and highlight it
+	void previousChange();
 
 private:
 	///

src/frontends/qt4/ui/ChangesUi.ui

@@ -43,6 +43,19 @@
      <property name="spacing" >
       <number>6</number>
      </property>
+     <item>
+      <widget class="QPushButton" name="previousPB" >
+       <property name="toolTip" >
+        <string>Go to previous change</string>
+       </property>
+       <property name="text" >
+        <string>&amp;Previous change</string>
+       </property>
+       <property name="default" >
+        <bool>false</bool>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="QPushButton" name="nextPB" >
        <property name="toolTip" >

src/lyxfind.cpp

@@ -100,11 +100,19 @@ bool findBackwards(DocIterator & cur, MatchString const & match,
 }
 
 
-bool findChange(DocIterator & cur)
+bool findChange(DocIterator & cur, bool next)
 {
-	for (; cur; cur.forwardPos())
-		if (cur.inTexted() && !cur.paragraph().isUnchanged(cur.pos()))
+	if (!next) 
+		cur.backwardPos();
+	for (; cur; next ? cur.forwardPos() : cur.backwardPos())
+		if (cur.inTexted() && !cur.paragraph().isUnchanged(cur.pos())) {
+			if (!next)
+				// if we search backwards, take a step forward
+				// to correctly set the anchor
+				cur.forwardPos();
 			return true;
+		}
+
 	return false;
 }
 
@@ -317,21 +325,54 @@ void replace(BufferView * bv, FuncRequest const & ev, bool has_deleted)
 
 bool findNextChange(BufferView * bv)
 {
-	DocIterator cur = bv->cursor();
+	return findChange(bv, true);
+}
 
-	if (!findChange(cur))
+
+bool findPreviousChange(BufferView * bv)
+{
+	return findChange(bv, false);
+}
+
+
+bool findChange(BufferView * bv, bool next)
+{
+	if (bv->cursor().selection()) {
+		// set the cursor at the beginning or at the end of the selection
+		// before searching. Otherwise, the current change will be found.
+		if (next != bv->cursor().top() > bv->cursor().anchor())
+			bv->cursor().setCursorToAnchor();
+	}
+
+	DocIterator cur = bv->cursor();
+	if (!findChange(cur, next))
 		return false;
 
 	bv->cursor().setCursor(cur);
 	bv->cursor().resetAnchor();
 
+	if (!next)
+		// take a step into the change
+		cur.backwardPos();
+
 	Change orig_change = cur.paragraph().lookupChange(cur.pos());
 
 	CursorSlice & tip = cur.top();
-	for (; !tip.at_end(); tip.forwardPos()) {
-		Change change = tip.paragraph().lookupChange(tip.pos());
-		if (change != orig_change)
-			break;
+	if (next) {
+		for (; !tip.at_end(); tip.forwardPos()) {
+			Change change = tip.paragraph().lookupChange(tip.pos());
+			if (change != orig_change)
+				break;
+		}
+	} else {
+		for (; !tip.at_begin(); tip.backwardPos()) {
+			Change change = tip.paragraph().lookupChange(tip.pos());
+			if (change != orig_change) {
+				// take a step forward to correctly set the selection
+				tip.forwardPos();
+				break;
+			}
+		}
 	}
 
 	// Now put cursor to end of selection:

src/lyxfind.h

@@ -58,6 +58,14 @@ void replace(BufferView * bv, FuncRequest const &, bool has_deleted = false);
 /// find the next change in the buffer
 bool findNextChange(BufferView * bv);
 
+/// find the previous change in the buffer
+bool findPreviousChange(BufferView * bv);
+
+/// find the change in the buffer
+/// \param next true to find the next change, otherwise the previous
+bool findChange(BufferView * bv, bool next);
+
+
 } // namespace lyx
 
 #endif // LYXFIND_H

status.16x

@@ -70,6 +70,7 @@ What's new
 
 - Make it possible to copy from a deleted section (bug 5390).
 
+- Reverse searching added to the merge changes dialog (bug 2213).
 
 
 * DOCUMENTATION AND LOCALIZATION
@@ -223,8 +224,9 @@ What's new
 
 - Fix selection of math insets on some archs.
 
-- Fix unitialized variable in Math, Dialog and inset painting code
-  (bugs 6082, 6081, 6077).
+- Fix of painter glitches caused by unitialized variables (bug 6077).
+
+- Fix unitialized variable in Dialog code (bug 6081).
 
 
 * DOCUMENTATION AND LOCALIZATION