/* 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 "funcrequest.h"
#include "BufferView.h"
#include "buffer.h"
-#include "insets/inset.h"
+#include "insets/updatableinset.h"
+#include "insets/insettext.h"
#include "debug.h"
#include "support/LAssert.h"
+#include "iterators.h"
+
+#include <vector>
-/// the flag used by FinishUndo();
+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->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);
+ if (bv->theLockingInset())
+ return bv->theLockingInset()->cursor(bv);
+ return bv->text->cursor;
}
-bool textRedo(BufferView * bv)
+/**
+ * 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.
+ */
+ParagraphList undoParagraphs(BufferView * bv, int inset_id)
{
- // 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)));
- }
- }
+ Inset * inset = bv->buffer()->getInsetFromID(inset_id);
+ if (inset) {
+ ParagraphList * result = inset->getParagraphs(0);
+ if (result && !result->empty())
+ return *result;
}
- return textHandleUndo(bv, undo);
+ return bv->text->ownerParagraphs();
}
-bool textHandleUndo(BufferView * bv, Undo * undo)
+/**
+ * Finish the undo operation in the case there was no entry
+ * on the stack to perform.
+ */
+void finishNoUndo(BufferView * bv)
{
- // 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);
- }
+ freezeUndo();
+ bv->unlockInset(bv->theLockingInset());
+ finishUndo();
+ bv->text->postPaint(0);
+ unFreezeUndo();
+}
- // 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();
- }
+
+// Returns false if no undo possible.
+bool textHandleUndo(BufferView * bv, Undo & undo)
+{
+ Buffer * b = bv->buffer();
+
+ ParIterator const before = b->getParFromID(undo.number_of_before_par);
+ ParIterator const behind = b->getParFromID(undo.number_of_behind_par);
+ ParIterator const end = b->par_iterator_end();
+
+ // If there's no before take the beginning
+ // of the document for redoing.
+ if (before == end) {
+ 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;
}
}
-
- // 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);
+ t->setCursorIntern(undoParagraphs(bv, num).begin(), 0);
+ }
+
+ // Set the right(new) inset-owner of the paragraph if there is any.
+ if (!undo.pars.empty()) {
+ Inset * in = 0;
+ if (before != end)
+ in = before->inInset();
+ else if (undo.number_of_inset_id >= 0)
+ in = bv->buffer()->getInsetFromID(undo.number_of_inset_id);
+ for (size_t i = 0, n = undo.pars.size(); i < n; ++i)
+ undo.pars[i]->setInsetOwner(in);
+ }
+
+ // Replace the paragraphs with the undo informations.
+ vector<Paragraph *> deletelist;
+
+ // Now add old paragraphs to be deleted.
+ if (before != behind || (behind == end && before == end)) {
+ ParagraphList::iterator deletepar;
+ if (before != end) {
+ deletepar = *before;
+ ++deletepar;
} else {
- // Do we really enter here ??? (Jug)
- if (!before)
- bv->text->ownerParagraph(behind);
- }
- if (tmppar4) {
- tmppar4->next(behind);
- if (behind)
- behind->previous(tmppar4);
+ deletepar = undoParagraphs(bv, undo.number_of_inset_id).begin();
}
-
-
- // Set the cursor for redoing
- if (before) {
- bv->text->setCursorIntern(bv, before, 0);
+ // this surprisingly fills the undo! (Andre')
+ size_t par = 0;
+ //while (deletepar && deletepar != *behind)
+ while (deletepar != *behind) {
+ deletelist.push_back(&*deletepar);
+ ++deletepar;
+
+ // A memory optimization for edit:
+ // Only layout information
+ // is stored in the undo. So restore
+ // the text informations.
+ if (undo.kind == Undo::EDIT) {
+ undo.pars[par]->setContentsFromPar(*deletelist.back());
+ ++par;
+ }
}
+ }
- // 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
+ // 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 (!undo.pars.empty()) {
+#warning FIXME
+ //undo.pars.back()->next(&**behind);
+ //if (behind != end)
+ //(&**behind)->previous(undo.pars.back());
+ }
+
+ // Put the new stuff in the list if there is one.
+ Paragraph * undopar = undo.pars.empty() ? 0 : undo.pars.front();
+ if (!undo.pars.empty()) {
+#warning FIXME
+ //undo.pars.front()->previous(&**before);
+ if (before != end) {
+#warning FIXME
+ //(&**before)->next(undopar);
} 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());
+ int id = undoParagraphs(bv, undo.number_of_inset_id).front().id();
+ ParIterator op = bv->buffer()->getParFromID(id);
+ if (op != end && op->inInset()) {
+#warning FIXME reimplementaion needed here
+ //static_cast<InsetText*>(op->inInset())->paragraph(undopar);
+ } else {
+#warning FIXME reimplementation needed here
+ //bv->buffer()->paragraphs.set(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 == end && behind != end) {
+ int id = undoParagraphs(bv, undo.number_of_inset_id).front().id();
+ ParIterator op = bv->buffer()->getParFromID(id);
+ if (op != end && op->inInset()) {
+#warning FIXME reimplementation needed here
+ //static_cast<InsetText*>(op->inInset())->paragraph(&**behind);
+ } else {
+#warning FIXME reimplementation needed here
+ //bv->buffer()->paragraphs.set(&**behind);
}
+ undopar = &**behind;
}
- 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;
-}
+ // Set the cursor for redoing.
+ // If we have a par before the undopar.
+ if (before != end) {
+ 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 freezeUndo()
-{
- // this is dangerous and for internal use only
- undo_frozen = true;
-}
+ UpdatableInset * it = 0;
+ if (undopar)
+ it = static_cast<UpdatableInset*>(undopar->inInset());
+ LyXText * text = it ? it->getLyXText(bv) : bv->text;
-void unFreezeUndo()
-{
- // this is dangerous and for internal use only
- undo_frozen = false;
-}
+ ParagraphList::iterator endpar = text->ownerParagraphs().end();
+ // Calculate the endpar for redoing the paragraphs.
+ if (behind != end) {
+ endpar = *behind;
+ ++endpar;
+ }
-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();
-}
+ text->redoParagraphs(text->cursor, endpar);
+ ParIterator tmppar =
+ bv->buffer()->getParFromID(undo.number_of_cursor_par);
+ if (tmppar != end) {
+ LyXText * t;
+ Inset * it = tmppar->inInset();
+ if (it) {
+ FuncRequest cmd(bv, LFUN_INSET_EDIT, "left");
+ it->localDispatch(cmd);
+ 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();
+ }
-void setRedo(BufferView * bv, Undo::undo_kind kind,
- Paragraph const * first, Paragraph const * behind)
-{
- bv->buffer()->redostack.push(createUndo(bv, kind, first, behind));
+ if (it) {
+ bv->fitCursor();
+ bv->updateInset(it);
+ bv->text->setCursorIntern(bv->text->cursor.par(),
+ bv->text->cursor.pos());
+ }
+
+ // And here it's safe enough to delete all removed paragraphs.
+ vector<Paragraph *>::iterator pit = deletelist.begin();
+ for(; pit != deletelist.end(); ++pit) {
+#warning FIXME
+ //(*pit)->previous(0);
+ //(*pit)->next(0);
+ delete (*pit);
+ }
+
+ // Otherwise the undo destructor would delete the paragraphs
+ undo.pars.resize(0);
+
+ finishUndo();
+ bv->text->postPaint(0);
+ return true;
}
-using lyx::pos_type;
-Undo * createUndo(BufferView * bv, Undo::undo_kind kind,
- Paragraph const * first, Paragraph const * behind)
+bool createUndo(BufferView * bv, Undo::undo_kind kind,
+ ParagraphList::iterator itfirst, ParagraphList::iterator itbehind,
+ shared_ptr<Undo> & u)
{
+ Paragraph * const first = &*itfirst;
+ Paragraph * const behind = &*itbehind;
lyx::Assert(first);
int before_number = -1;
int behind_number = -1;
int inset_id = -1;
- if (first->previous())
- before_number = first->previous()->id();
+#warning FIXME
+ //if (first->previous())
+ // before_number = first->previous()->id();
if (behind)
behind_number = behind->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 ){
- // no undo needed
- return 0;
+ 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 false;
}
}
- // create a new Undo
- Paragraph * undopar;
- Paragraph * start = const_cast<Paragraph *>(first);
- Paragraph * end = 0;
+ // Create a new Undo.
+ std::vector<Paragraph *> undo_pars;
- if (behind)
- end = const_cast<Paragraph*>(behind->previous());
- else {
- end = start;
- while (end->next())
- end = end->next();
+ Paragraph const * end = 0;
+
+ if (behind) {
+#warning FIXME
+ //end = behind->previous();
+ }else {
+ end = first;
+#warning FIXME
+ //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)
+#warning FIXME
+// if (first && end && (first != end->next()) &&
+// ((before_number != behind_number) ||
+// ((before_number < 0) && (behind_number < 0))))
+// {
+// undo_pars.push_back(new Paragraph(*first, true));
+// for (Paragraph * tmppar = first; tmppar != end && tmppar->next(); ) {
+// tmppar = tmppar->next();
+// undo_pars.push_back(new Paragraph(*tmppar, true));
+// size_t const n = undo_pars.size();
+// undo_pars[n - 2]->next(undo_pars[n - 1]);
+// undo_pars[n - 1]->previous(undo_pars[n - 2]);
+// }
+// undo_pars.back()->next(0);
+// }
+
+ // A memory optimization: Just store the layout
+ // information when only edit.
+ if (kind == Undo::EDIT) {
+ for (size_t i = 0, n = undo_pars.size(); i < n; ++i)
+ undo_pars[i]->clearContents();
+ }
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);
-
+ int cursor_pos = undoCursor(bv).pos();
+
+ //lyxerr << "createUndo: inset_id: " << inset_id << " before_number: "
+ // << before_number << " behind_number: " << behind_number << "\n";
+ u.reset(new Undo(kind, inset_id,
+ before_number, behind_number,
+ cursor_par, cursor_pos, undo_pars));
+
undo_finished = false;
- return undo;
+ return true;
}
-void setCursorParUndo(BufferView * bv)
+// Returns false if no undo possible.
+bool textUndoOrRedo(BufferView * bv,
+ limited_stack<boost::shared_ptr<Undo> > & stack,
+ limited_stack<boost::shared_ptr<Undo> > & /*otherstack*/)
{
- setUndo(bv, Undo::FINISH,
- bv->text->cursor.par(),
- bv->text->cursor.par()->next());
+ //Buffer * b = bv->buffer();
+
+ if (stack.empty()) {
+ finishNoUndo(bv);
+ return false;
+ }
+
+ shared_ptr<Undo> undo = stack.top();
+ stack.pop();
+ finishUndo();
+
+ if (!undo_frozen) {
+/*
+ ParIterator p = b->getParFromID(undo->number_of_before_par);
+ bool ok = false;
+ ParagraphList::iterator first;
+ // default constructed?
+ ParIterator const end = b->par_iterator_end();
+ if (p != end) {
+ first = p.par();
+ if (first->next())
+ first = first->next();
+ } else
+ first = undoParagraphs(bv, undo->number_of_inset_id).begin();
+ if (first) {
+ shared_ptr<Undo> u;
+ ParIterator behind = b->getParFromID(undo->number_of_behind_par);
+ if (createUndo(bv, undo->kind, first, behind.par(), u))
+ otherstack.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 const ret = textHandleUndo(bv, *undo.get());
+ unFreezeUndo();
+ return ret;
}
-Paragraph * firstUndoParagraph(BufferView * bv, int inset_id)
+} // namespace anon
+
+
+void finishUndo()
{
- Inset * inset = bv->buffer()->getInsetFromID(inset_id);
- if (inset) {
- Paragraph * result = inset->firstParagraph();
- if (result)
- return result;
+ // 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;
+}
+
+
+bool textUndo(BufferView * bv)
+{
+ return textUndoOrRedo(bv, bv->buffer()->undostack,
+ bv->buffer()->redostack);
+}
+
+
+bool textRedo(BufferView * bv)
+{
+ return textUndoOrRedo(bv, bv->buffer()->redostack,
+ bv->buffer()->undostack);
+}
+
+
+void setUndo(BufferView * bv, Undo::undo_kind kind,
+ ParagraphList::iterator first, ParagraphList::iterator behind)
+{
+ if (!undo_frozen) {
+ shared_ptr<Undo> u;
+ if (createUndo(bv, kind, first, behind, u))
+ bv->buffer()->undostack.push(u);
+ bv->buffer()->redostack.clear();
}
- return bv->text->ownerParagraph();
}
-LyXCursor const & undoCursor(BufferView * bv)
+
+void setRedo(BufferView * bv, Undo::undo_kind kind,
+ ParagraphList::iterator first, ParagraphList::iterator behind)
{
- if (bv->theLockingInset())
- return bv->theLockingInset()->cursor(bv);
- return bv->text->cursor;
+ 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(),
+ boost::next(bv->text->cursor.par()));
}