/* 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 "insets/updatableinset.h"
#include "debug.h"
+#include "support/LAssert.h"
+
+#include "iterators.h"
+
+#include <vector>
+
+using std::vector;
+using boost::shared_ptr;
+
/// the flag used by FinishUndo();
bool undo_finished;
-/// a flag
+/// whether actions are not added to the undo stacks
bool undo_frozen;
-bool textUndo(BufferView * bv)
+namespace {
+
+/// utility to return the cursor
+LyXCursor const & undoCursor(BufferView * bv)
{
- // returns false if no undo possible
- Undo * undo = bv->buffer()->undostack.pop();
- if (undo) {
- finishUndo();
- if (!undo_frozen) {
- Paragraph * first = bv->text->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->text->getParFromID(undo->number_of_behind_par)));
- }
- }
+ if (bv->theLockingInset())
+ return bv->theLockingInset()->cursor(bv);
+ return bv->text->cursor;
+}
+
+/**
+ * returns a pointer to the very first Paragraph depending of where we are
+ * so it will return the first paragraph of the buffer or the first paragraph
+ * of the textinset we're in.
+ */
+Paragraph * firstUndoParagraph(BufferView * bv, int inset_id)
+{
+ Inset * inset = bv->buffer()->getInsetFromID(inset_id);
+ if (inset) {
+ Paragraph * result = inset->getFirstParagraph(0);
+ if (result)
+ return result;
}
- return textHandleUndo(bv, undo);
+ return &*bv->text->ownerParagraphs().begin();
}
-bool textRedo(BufferView * bv)
+/**
+ * Finish the undo operation in the case there was no entry
+ * on the stack to perform.
+ */
+void finishNoUndo(BufferView * bv)
{
- // returns false if no redo possible
- Undo * undo = bv->buffer()->redostack.pop();
- if (undo) {
- finishUndo();
- if (!undo_frozen) {
- Paragraph * first = bv->text->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->text->getParFromID(undo->number_of_behind_par)));
- }
- }
- }
- return textHandleUndo(bv, undo);
+ freezeUndo();
+ bv->unlockInset(bv->theLockingInset());
+ finishUndo();
+ bv->text->postPaint(0);
+ unFreezeUndo();
}
-bool textHandleUndo(BufferView * bv, Undo * undo)
+// returns false if no undo possible
+bool textHandleUndo(BufferView * bv, Undo & undo)
{
- // returns false if no undo possible
- bool result = false;
- if (undo) {
- Paragraph * before =
- bv->text->getParFromID(undo->number_of_before_par);
- Paragraph * behind =
- bv->text->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;
- }
+ Buffer * b = bv->buffer();
+
+ Paragraph * before =
+ b->getParFromID(undo.number_of_before_par);
+ Paragraph * behind =
+ b->getParFromID(undo.number_of_behind_par);
+ Paragraph * tmppar;
+ Paragraph * tmppar2;
+
+ // 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);
}
+ t->setCursorIntern(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);
+ // replace the paragraphs with the undo informations
+
+ Paragraph * undopar = undo.par;
+ undo.par = 0; /* otherwise the undo destructor would
+ delete the paragraph */
+
+ // get last undo par and set the right(new) inset-owner of the
+ // paragraph if there is any. This is not needed if we don't have
+ // a paragraph before because then in is automatically done in the
+ // function which assigns the first paragraph to an InsetText. (Jug)
+ Paragraph * lastundopar = undopar;
+ if (lastundopar) {
+ Inset * in = 0;
+ if (before)
+ in = before->inInset();
+ else if (undo.number_of_inset_id >= 0)
+ in = bv->buffer()->getInsetFromID(undo.number_of_inset_id);
+ lastundopar->setInsetOwner(in);
+ while (lastundopar->next()) {
+ lastundopar = lastundopar->next();
+ lastundopar->setInsetOwner(in);
}
+ }
- // calculate the endpar for redoing the paragraphs.
- if (behind) {
- endpar = behind->next();
- } else
- endpar = behind;
-
- tmppar = bv->text->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());
+ vector<Paragraph *> deletelist;
+
+ Paragraph * deletepar;
+
+ // now add old paragraphs to be deleted
+ if (before != behind || (!behind && !before)) {
+ if (before)
+ deletepar = before->next();
+ else
+ deletepar = firstUndoParagraph(bv, undo.number_of_inset_id);
+ tmppar2 = undopar;
+ while (deletepar && deletepar != behind) {
+ deletelist.push_back(deletepar);
+ tmppar = deletepar;
+ deletepar = deletepar->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);
+ tmppar2 = tmppar2->next();
}
}
- 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;
-}
+ // The order here is VERY IMPORTANT. We have to set the right
+ // next/prev pointer in the paragraphs so that a rebuild of
+ // the LyXText works!!!
+ // thread the end of the undo onto the par in front if any
+ if (lastundopar) {
+ lastundopar->next(behind);
+ if (behind)
+ behind->previous(lastundopar);
+ }
-void freezeUndo()
-{
- // this is dangerous and for internal use only
- undo_frozen = true;
-}
+ // put the new stuff in the list if there is one
+ if (undopar) {
+ undopar->previous(before);
+ if (before)
+ before->next(undopar);
+ else
+ bv->text->ownerParagraph(firstUndoParagraph(bv, undo.number_of_inset_id)->id(),
+ undopar);
+
+ } else {
+ // We enter here on DELETE undo operations where we have to
+ // substitue the second paragraph with the first if the removed
+ // one is the first!
+ if (!before && behind) {
+ bv->text->ownerParagraph(firstUndoParagraph(bv, undo.number_of_inset_id)->id(),
+ behind);
+ undopar = behind;
+ }
+ }
-void unFreezeUndo()
-{
- // this is dangerous and for internal use only
- undo_frozen = false;
-}
-
+ // Set the cursor for redoing
+ if (before) { // if we have a par before the undopar
+ Inset * it = before->inInset();
+ if (it)
+ it->getLyXText(bv)->setCursorIntern(before, 0);
+ else
+ bv->text->setCursorIntern(before, 0);
+ }
+// we are not ready for this we cannot set the cursor for a paragraph
+// which is not already in a row of LyXText!!!
+#if 0
+ else { // otherwise this is the first one and we start here
+ Inset * it = undopar->inInset();
+ if (it)
+ it->getLyXText(bv)->setCursorIntern(bv, undopar, 0);
+ else
+ bv->text->setCursorIntern(bv, undopar, 0);
+ }
+#endif
-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();
-}
+ Paragraph * endpar = 0;
+ // calculate the endpar for redoing the paragraphs.
+ if (behind)
+ endpar = behind->next();
+
+ tmppar = bv->buffer()->getParFromID(undo.number_of_cursor_par);
+ UpdatableInset* it = 0;
+ if (undopar)
+ it = static_cast<UpdatableInset*>(undopar->inInset());
+ if (it) {
+ it->getLyXText(bv)->redoParagraphs(
+ it->getLyXText(bv)->cursor,
+ endpar);
+ if (tmppar) {
+ it = static_cast<UpdatableInset*>(tmppar->inInset());
+ LyXText * t;
+ if (it) {
+ it->edit(bv);
+ t = it->getLyXText(bv);
+ } else {
+ t = bv->text;
+ }
+ t->setCursorIntern(tmppar, undo.cursor_pos);
+ // clear any selection and set the selection cursor
+ // for an evt. new selection.
+ t->clearSelection();
+ t->selection.cursor = t->cursor;
+ t->updateCounters();
+ bv->fitCursor();
+ }
+ bv->updateInset(it);
+ bv->text->setCursorIntern(bv->text->cursor.par(),
+ bv->text->cursor.pos());
+ } else {
+ bv->text->redoParagraphs(bv->text->cursor, endpar);
+ if (tmppar) {
+ LyXText * t;
+ Inset * it = tmppar->inInset();
+ if (it) {
+ it->edit(bv);
+ t = it->getLyXText(bv);
+ } else {
+ t = bv->text;
+ }
+ t->setCursorIntern(tmppar, undo.cursor_pos);
+ // clear any selection and set the selection cursor
+ // for an evt. new selection.
+ t->clearSelection();
+ t->selection.cursor = t->cursor;
+ t->updateCounters();
+ }
+ }
+ // And here it's safe enough to delete all removed paragraphs
+ vector<Paragraph *>::iterator pit = deletelist.begin();
+ if (pit != deletelist.end()) {
+ for(;pit != deletelist.end(); ++pit) {
+ (*pit)->previous(0);
+ (*pit)->next(0);
+ delete (*pit);
+ }
+ }
-void setRedo(BufferView * bv, Undo::undo_kind kind,
- Paragraph const * first, Paragraph const * behind)
-{
- bv->buffer()->redostack.push(createUndo(bv, kind, first, behind));
+ finishUndo();
+ bv->text->postPaint(0);
+ return true;
}
-Undo * createUndo(BufferView * bv, Undo::undo_kind kind,
- Paragraph const * first, Paragraph const * behind)
+bool createUndo(BufferView * bv, Undo::undo_kind kind,
+ Paragraph const * first, Paragraph const * behind, shared_ptr<Undo> & u)
{
lyx::Assert(first);
before_number = first->previous()->id();
if (behind)
behind_number = behind->id();
- if (first->InInset())
- inset_id = first->InInset()->id();
+ if (first->inInset())
+ inset_id = first->inInset()->id();
+
+ Buffer * b = bv->buffer();
// Undo::EDIT and Undo::FINISH are
// always finished. (no overlapping there)
- // overlapping only with insert and delete inside one paragraph:
+ // overlapping only with insert and delete inside one paragraph:
// Nobody wants all removed character
- // appear one by one when undoing.
+ // 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 ){
+ if (!undo_finished && (kind != Undo::EDIT) && (kind != Undo::FINISH)) {
+ // check whether storing is needed
+ if (!b->undostack.empty() &&
+ b->undostack.top()->kind == kind &&
+ b->undostack.top()->number_of_before_par == before_number &&
+ b->undostack.top()->number_of_behind_par == behind_number) {
// no undo needed
- return 0;
+ return false;
}
}
+
// 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 {
}
if (start && end && (start != end->next()) &&
((before_number != behind_number) ||
- ((before_number < 0) && (behind_number < 0)))) {
+ ((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) {
}
undopar = tmppar2;
-
+
while (tmppar != end && tmppar->next()) {
tmppar = tmppar->next();
- tmppar2->next(new Paragraph(*tmppar));
- tmppar2->next()->id(tmppar->id());
+ tmppar2->next(new Paragraph(*tmppar, true));
// 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);
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);
-
+
+ u.reset(new Undo(kind, inset_id,
+ before_number, behind_number,
+ cursor_par, cursor_pos, undopar));
+
undo_finished = false;
- return undo;
+ return true;
}
+} // namespace anon
-void setCursorParUndo(BufferView * bv)
+void finishUndo()
{
- setUndo(bv, Undo::FINISH,
- bv->text->cursor.par(),
- bv->text->cursor.par()->next());
+ // makes sure the next operation will be stored
+ undo_finished = true;
}
-Paragraph * firstUndoParagraph(BufferView * bv, int inset_id)
+
+void freezeUndo()
{
- Inset * inset = bv->buffer()->getInsetFromID(inset_id);
- if (inset) {
- Paragraph * result = inset->firstParagraph();
- if (result)
- return result;
+ // this is dangerous and for internal use only
+ undo_frozen = true;
+}
+
+
+void unFreezeUndo()
+{
+ // this is dangerous and for internal use only
+ undo_frozen = false;
+}
+
+
+// returns false if no undo possible
+bool textUndo(BufferView * bv)
+{
+ Buffer * b = bv->buffer();
+
+ if (b->undostack.empty()) {
+ finishNoUndo(bv);
+ return false;
+ }
+
+ shared_ptr<Undo> undo = b->undostack.top();
+ b->undostack.pop();
+ finishUndo();
+
+ if (!undo_frozen) {
+ Paragraph * first = b->getParFromID(undo->number_of_before_par);
+ if (first && first->next())
+ first = first->next();
+ else if (!first)
+ first = firstUndoParagraph(bv, undo->number_of_inset_id);
+ if (first) {
+ shared_ptr<Undo> u;
+ if (createUndo(bv, undo->kind, first,
+ b->getParFromID(undo->number_of_behind_par), u))
+ b->redostack.push(u);
+ }
}
- return bv->text->ownerParagraph();
+
+ // now we can unlock the inset for saftey because the inset pointer could
+ // be changed during the undo-function. Anyway if needed we have to lock
+ // the right inset/position if this is requested.
+ freezeUndo();
+ bv->unlockInset(bv->theLockingInset());
+ bool const ret = textHandleUndo(bv, *undo.get());
+ unFreezeUndo();
+ return ret;
}
-LyXCursor const & undoCursor(BufferView * bv)
+
+// returns false if no redo possible
+bool textRedo(BufferView * bv)
{
- if (bv->theLockingInset())
- return bv->theLockingInset()->cursor(bv);
- return bv->text->cursor;
+ Buffer * b = bv->buffer();
+
+ if (b->redostack.empty()) {
+ finishNoUndo(bv);
+ return false;
+ }
+
+ shared_ptr<Undo> undo = b->redostack.top();
+ b->redostack.pop();
+ finishUndo();
+
+ if (!undo_frozen) {
+ Paragraph * first = bv->buffer()->getParFromID(undo->number_of_before_par);
+ if (first && first->next())
+ first = first->next();
+ else if (!first)
+ first = firstUndoParagraph(bv, undo->number_of_inset_id);
+ if (first) {
+ shared_ptr<Undo> u;
+ if (createUndo(bv, undo->kind, first,
+ bv->buffer()->getParFromID(undo->number_of_behind_par), u))
+ bv->buffer()->undostack.push(u);
+ }
+ }
+
+ // now we can unlock the inset for saftey because the inset pointer could
+ // be changed during the undo-function. Anyway if needed we have to lock
+ // the right inset/position if this is requested.
+ freezeUndo();
+ bv->unlockInset(bv->theLockingInset());
+ bool ret = textHandleUndo(bv, *undo.get());
+ unFreezeUndo();
+ return ret;
+}
+
+
+void setUndo(BufferView * bv, Undo::undo_kind kind,
+ Paragraph const * first, Paragraph const * behind)
+{
+ if (!undo_frozen) {
+ shared_ptr<Undo> u;
+ if (createUndo(bv, kind, first, behind, u))
+ bv->buffer()->undostack.push(u);
+ bv->buffer()->redostack.clear();
+ }
+}
+
+
+void setRedo(BufferView * bv, Undo::undo_kind kind,
+ Paragraph const * first, Paragraph const * behind)
+{
+ shared_ptr<Undo> u;
+ if (createUndo(bv, kind, first, behind, u))
+ bv->buffer()->redostack.push(u);
+}
+
+
+void setCursorParUndo(BufferView * bv)
+{
+ setUndo(bv, Undo::FINISH, bv->text->cursor.par(),
+ bv->text->cursor.par()->next());
}
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