mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-09-20 23:07:43 +00:00
271f8d7eec
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2713 a592a061-630c-0410-9148-cb99ea01b6c8
349 lines
8.7 KiB
C
349 lines
8.7 KiB
C
/* This file is part of
|
|
* ======================================================
|
|
*
|
|
* LyX, The Document Processor
|
|
*
|
|
* Copyright 1995-2001 The LyX Team.
|
|
*
|
|
* ====================================================== */
|
|
|
|
#include <config.h>
|
|
|
|
#ifdef __GNUG__
|
|
#pragma implementation
|
|
#endif
|
|
|
|
#include "undo_funcs.h"
|
|
#include "lyxtext.h"
|
|
#include "BufferView.h"
|
|
#include "buffer.h"
|
|
#include "insets/inset.h"
|
|
#include "debug.h"
|
|
#include "support/LAssert.h"
|
|
|
|
/// the flag used by FinishUndo();
|
|
bool undo_finished;
|
|
/// a flag
|
|
bool undo_frozen;
|
|
|
|
bool textUndo(BufferView * bv)
|
|
{
|
|
// returns false if no undo possible
|
|
Undo * undo = bv->buffer()->undostack.pop();
|
|
if (undo) {
|
|
finishUndo();
|
|
if (!undo_frozen) {
|
|
Paragraph * first = bv->buffer()->getParFromID(undo->number_of_before_par);
|
|
if (!first)
|
|
first = firstUndoParagraph(bv, undo->number_of_inset_id);
|
|
if (first) {
|
|
bv->buffer()->redostack.push(
|
|
createUndo(bv, undo->kind, first,
|
|
bv->buffer()->getParFromID(undo->number_of_behind_par)));
|
|
}
|
|
}
|
|
}
|
|
return textHandleUndo(bv, undo);
|
|
}
|
|
|
|
|
|
bool textRedo(BufferView * bv)
|
|
{
|
|
// returns false if no redo possible
|
|
Undo * undo = bv->buffer()->redostack.pop();
|
|
if (undo) {
|
|
finishUndo();
|
|
if (!undo_frozen) {
|
|
Paragraph * first = bv->buffer()->getParFromID(undo->number_of_before_par);
|
|
if (!first)
|
|
first = firstUndoParagraph(bv, undo->number_of_inset_id);
|
|
if (first) {
|
|
bv->buffer()->undostack.push(
|
|
createUndo(bv, undo->kind, first,
|
|
bv->buffer()->getParFromID(undo->number_of_behind_par)));
|
|
}
|
|
}
|
|
}
|
|
return textHandleUndo(bv, undo);
|
|
}
|
|
|
|
|
|
bool textHandleUndo(BufferView * bv, Undo * undo)
|
|
{
|
|
// returns false if no undo possible
|
|
bool result = false;
|
|
if (undo) {
|
|
Paragraph * before =
|
|
bv->buffer()->getParFromID(undo->number_of_before_par);
|
|
Paragraph * behind =
|
|
bv->buffer()->getParFromID(undo->number_of_behind_par);
|
|
Paragraph * tmppar;
|
|
Paragraph * tmppar2;
|
|
Paragraph * endpar;
|
|
Paragraph * tmppar5;
|
|
|
|
// if there's no before take the beginning
|
|
// of the document for redoing
|
|
if (!before) {
|
|
LyXText * t = bv->text;
|
|
int num = undo->number_of_inset_id;
|
|
if (undo->number_of_inset_id >= 0) {
|
|
Inset * in = bv->buffer()->getInsetFromID(num);
|
|
if (in) {
|
|
t = in->getLyXText(bv);
|
|
} else {
|
|
num = -1;
|
|
}
|
|
}
|
|
t->setCursorIntern(bv, firstUndoParagraph(bv, num), 0);
|
|
}
|
|
|
|
// replace the paragraphs with the undo informations
|
|
|
|
Paragraph * tmppar3 = undo->par;
|
|
undo->par = 0; // otherwise the undo destructor would delete the paragraph
|
|
Paragraph * tmppar4 = tmppar3;
|
|
|
|
if (tmppar4) {
|
|
while (tmppar4->next())
|
|
tmppar4 = tmppar4->next();
|
|
} // get last undo par
|
|
|
|
// now remove the old text if there is any
|
|
if (before != behind || (!behind && !before)) {
|
|
if (before)
|
|
tmppar5 = before->next();
|
|
else
|
|
tmppar5 = firstUndoParagraph(bv, undo->number_of_inset_id);
|
|
tmppar2 = tmppar3;
|
|
while (tmppar5 && tmppar5 != behind) {
|
|
tmppar = tmppar5;
|
|
tmppar5 = tmppar5->next();
|
|
// a memory optimization for edit: Only layout information
|
|
// is stored in the undo. So restore the text informations.
|
|
if (undo->kind == Undo::EDIT) {
|
|
tmppar2->setContentsFromPar(tmppar);
|
|
tmppar->clearContents();
|
|
tmppar2 = tmppar2->next();
|
|
}
|
|
}
|
|
}
|
|
|
|
// put the new stuff in the list if there is one
|
|
if (tmppar3){
|
|
if (before)
|
|
before->next(tmppar3);
|
|
else
|
|
bv->text->ownerParagraph(tmppar3->id(), tmppar3);
|
|
tmppar3->previous(before);
|
|
} else {
|
|
// Do we really enter here ??? (Jug)
|
|
if (!before)
|
|
bv->text->ownerParagraph(behind);
|
|
}
|
|
if (tmppar4) {
|
|
tmppar4->next(behind);
|
|
if (behind)
|
|
behind->previous(tmppar4);
|
|
}
|
|
|
|
|
|
// Set the cursor for redoing
|
|
if (before) {
|
|
bv->text->setCursorIntern(bv, before, 0);
|
|
}
|
|
|
|
// calculate the endpar for redoing the paragraphs.
|
|
if (behind) {
|
|
endpar = behind->next();
|
|
} else
|
|
endpar = behind;
|
|
|
|
tmppar = bv->buffer()->getParFromID(undo->number_of_cursor_par);
|
|
UpdatableInset* it = static_cast<UpdatableInset*>(tmppar3->inInset());
|
|
if (it) {
|
|
it->getLyXText(bv)->redoParagraphs(bv, it->getLyXText(bv)->cursor,
|
|
endpar);
|
|
if (tmppar){
|
|
it->getLyXText(bv)->setCursorIntern(bv, tmppar, undo->cursor_pos);
|
|
it->getLyXText(bv)->updateCounters(bv, it->getLyXText(bv)->cursor.row());
|
|
}
|
|
#ifdef THIS_DOES_NOT_WORK
|
|
// we need this anyway as also if the undo was inside an inset
|
|
// we have to redo the paragraph breaking
|
|
bv->text->redoParagraphs(bv, bv->text->cursor,
|
|
bv->text->cursor.par());
|
|
#endif
|
|
} else {
|
|
bv->text->redoParagraphs(bv, bv->text->cursor, endpar);
|
|
if (tmppar) {
|
|
bv->text->setCursorIntern(bv, tmppar, undo->cursor_pos);
|
|
bv->text->updateCounters(bv, bv->text->cursor.row());
|
|
}
|
|
}
|
|
result = true;
|
|
delete undo;
|
|
}
|
|
finishUndo();
|
|
bv->text->status(bv, LyXText::NEED_MORE_REFRESH);
|
|
return result;
|
|
}
|
|
|
|
|
|
void finishUndo()
|
|
{
|
|
// makes sure the next operation will be stored
|
|
undo_finished = true;
|
|
}
|
|
|
|
|
|
void freezeUndo()
|
|
{
|
|
// this is dangerous and for internal use only
|
|
undo_frozen = true;
|
|
}
|
|
|
|
|
|
void unFreezeUndo()
|
|
{
|
|
// this is dangerous and for internal use only
|
|
undo_frozen = false;
|
|
}
|
|
|
|
|
|
void setUndo(BufferView * bv, Undo::undo_kind kind,
|
|
Paragraph const * first, Paragraph const * behind)
|
|
{
|
|
if (!undo_frozen)
|
|
bv->buffer()->undostack.push(createUndo(bv, kind, first, behind));
|
|
bv->buffer()->redostack.clear();
|
|
}
|
|
|
|
|
|
void setRedo(BufferView * bv, Undo::undo_kind kind,
|
|
Paragraph const * first, Paragraph const * behind)
|
|
{
|
|
bv->buffer()->redostack.push(createUndo(bv, kind, first, behind));
|
|
}
|
|
|
|
|
|
Undo * createUndo(BufferView * bv, Undo::undo_kind kind,
|
|
Paragraph const * first, Paragraph const * behind)
|
|
{
|
|
lyx::Assert(first);
|
|
|
|
int before_number = -1;
|
|
int behind_number = -1;
|
|
int inset_id = -1;
|
|
|
|
if (first->previous())
|
|
before_number = first->previous()->id();
|
|
if (behind)
|
|
behind_number = behind->id();
|
|
if (first->inInset())
|
|
inset_id = first->inInset()->id();
|
|
|
|
// Undo::EDIT and Undo::FINISH are
|
|
// always finished. (no overlapping there)
|
|
// overlapping only with insert and delete inside one paragraph:
|
|
// Nobody wants all removed character
|
|
// appear one by one when undoing.
|
|
// EDIT is special since only layout information, not the
|
|
// contents of a paragaph are stored.
|
|
if (!undo_finished && (kind != Undo::EDIT) && (kind != Undo::FINISH)){
|
|
// check wether storing is needed
|
|
if (!bv->buffer()->undostack.empty() &&
|
|
bv->buffer()->undostack.top()->kind == kind &&
|
|
bv->buffer()->undostack.top()->number_of_before_par == before_number &&
|
|
bv->buffer()->undostack.top()->number_of_behind_par == behind_number ){
|
|
// no undo needed
|
|
return 0;
|
|
}
|
|
}
|
|
// create a new Undo
|
|
Paragraph * undopar;
|
|
|
|
Paragraph * start = const_cast<Paragraph *>(first);
|
|
Paragraph * end = 0;
|
|
|
|
#if 0
|
|
if (first)
|
|
start = const_cast<Paragraph*>(before->next());
|
|
else
|
|
start = firstUndoParagraph(bv);
|
|
#endif
|
|
if (behind)
|
|
end = const_cast<Paragraph*>(behind->previous());
|
|
else {
|
|
end = start;
|
|
while (end->next())
|
|
end = end->next();
|
|
}
|
|
if (start && end && (start != end->next()) &&
|
|
((before_number != behind_number) ||
|
|
((before_number < 0) && (behind_number < 0)))) {
|
|
Paragraph * tmppar = start;
|
|
Paragraph * tmppar2 = new Paragraph(*tmppar, true);
|
|
tmppar2->id(tmppar->id());
|
|
|
|
// a memory optimization: Just store the layout information
|
|
// when only edit
|
|
if (kind == Undo::EDIT) {
|
|
tmppar2->clearContents();
|
|
}
|
|
|
|
undopar = tmppar2;
|
|
|
|
while (tmppar != end && tmppar->next()) {
|
|
tmppar = tmppar->next();
|
|
tmppar2->next(new Paragraph(*tmppar, false));
|
|
tmppar2->next()->id(tmppar->id());
|
|
// a memory optimization: Just store the layout
|
|
// information when only edit
|
|
if (kind == Undo::EDIT) {
|
|
tmppar2->clearContents();
|
|
}
|
|
tmppar2->next()->previous(tmppar2);
|
|
tmppar2 = tmppar2->next();
|
|
}
|
|
tmppar2->next(0);
|
|
} else
|
|
undopar = 0; // nothing to replace (undo of delete maybe)
|
|
|
|
int cursor_par = undoCursor(bv).par()->id();
|
|
int cursor_pos = undoCursor(bv).pos();
|
|
|
|
Undo * undo = new Undo(kind, inset_id,
|
|
before_number, behind_number,
|
|
cursor_par, cursor_pos, undopar);
|
|
|
|
undo_finished = false;
|
|
return undo;
|
|
}
|
|
|
|
|
|
void setCursorParUndo(BufferView * bv)
|
|
{
|
|
setUndo(bv, Undo::FINISH,
|
|
bv->text->cursor.par(),
|
|
bv->text->cursor.par()->next());
|
|
}
|
|
|
|
Paragraph * firstUndoParagraph(BufferView * bv, int inset_id)
|
|
{
|
|
Inset * inset = bv->buffer()->getInsetFromID(inset_id);
|
|
if (inset) {
|
|
Paragraph * result = inset->firstParagraph();
|
|
if (result)
|
|
return result;
|
|
}
|
|
return bv->text->ownerParagraph();
|
|
}
|
|
|
|
LyXCursor const & undoCursor(BufferView * bv)
|
|
{
|
|
if (bv->theLockingInset())
|
|
return bv->theLockingInset()->cursor(bv);
|
|
return bv->text->cursor;
|
|
}
|