-/* This file is part of
- * ======================================================
- *
- * LyX, The Document Processor
+/**
+ * \file undo_funcs.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
*
- * Copyright 1995-2001 The LyX Team.
+ * \author Asger Alstrup
+ * \author Lars Gullik Bjønnes
+ * \author John Levon
+ * \author André Pönitz
+ * \author Jürgen Vigna
*
- * ====================================================== */
+ * Full author contact details are available in file CREDITS.
+ */
#include <config.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;
+
/// Whether actions are not added to the undo stacks.
bool undo_frozen;
namespace {
-/// Utility to return the cursor.
-LyXCursor const & undoCursor(BufferView * bv)
-{
- 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.
- */
-ParagraphList * undoParagraphs(BufferView * bv, int inset_id)
+void recordUndo(BufferView * bv, Undo::undo_kind kind,
+ ParagraphList::iterator first, ParagraphList::iterator last,
+ limited_stack<Undo> & stack)
{
- Inset * inset = bv->buffer()->getInsetFromID(inset_id);
- if (inset) {
- ParagraphList * result = inset->getParagraphs(0);
- if (result && !result->empty())
- return result;
+ Buffer * buf = bv->buffer();
+
+ // First, record inset id, if cursor is in one
+ UpdatableInset * inset = first->inInset();
+ LyXText * text = inset ? inset->getLyXText(bv) : bv->text;
+ int const inset_id = inset ? inset->id() : -1;
+
+ // We simply record the entire outer paragraphs
+ ParagraphList * plist = &buf->paragraphs;
+ ParIterator null = buf->par_iterator_end();
+
+ // First, identify the outer paragraphs
+ for (ParIterator it = buf->par_iterator_begin(); it != null; ++it) {
+ if (it->id() == first->id())
+ first = it.outerPar();
+ if (it->id() == last->id())
+ last = it.outerPar();
}
- return &bv->text->ownerParagraphs();
-}
+ // And calculate a stable reference to them
+ int const first_offset = std::distance(plist->begin(), first);
+ int const last_offset = std::distance(last, plist->end());
-/**
- * Finish the undo operation in the case there was no entry
- * on the stack to perform.
- */
-void finishNoUndo(BufferView * bv)
-{
- freezeUndo();
- bv->unlockInset(bv->theLockingInset());
- finishUndo();
- bv->text->postPaint(0);
- unFreezeUndo();
-}
-
+ // Undo::ATOMIC are always recorded (no overlapping there).
-// 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 null = b->par_iterator_end();
-
- int const before_id = (before == null) ? -1 : before->id();
- int const behind_id = (behind == null) ? -1 : behind->id();
- int const inset_id = undo.number_of_inset_id;
-
- ParagraphList * plist = undoParagraphs(bv, inset_id);
-
- ParagraphList::iterator first;
- if (before == null) {
- // if there's no before take the beginning of parlist.
- first = plist->begin();
- LyXText * t = bv->text;
- if (inset_id >= 0)
- if (Inset * in = bv->buffer()->getInsetFromID(inset_id))
- t = in->getLyXText(bv);
- t->setCursorIntern(plist->begin(), 0);
- } else {
- first = *before;
- ++first;
- }
- int const first_id = first->id();
-
- int after_id;
- ParagraphList::iterator after;
- if (behind == null) {
- // if there's no behind take the end of parlist.
- after = plist->end();
- after_id = -1;
- } else {
- after = *behind;
- after_id = after->id();
+ // Overlapping only with insert and delete inside one paragraph:
+ // Nobody wants all removed character appear one by one when undoing.
+ if (! undo_finished && kind != Undo::ATOMIC) {
+ // Check whether storing is needed.
+ if (! buf->undostack.empty()
+ && buf->undostack.top().kind == kind
+ && buf->undostack.top().first_par_offset == first_offset
+ && buf->undostack.top().last_par_offset == last_offset) {
+ // No additonal undo recording needed -
+ // effectively, we combine undo recordings to one.
+ return;
+ }
}
- lyxerr << "\nbefore_id: " << before_id << "\n";
- lyxerr << "first_id: " << first_id << "\n";
- lyxerr << "after_id: " << after_id << "\n";
- lyxerr << "behind_id: " << behind_id << "\n";
- lyxerr << "inset_id: " << inset_id << "\n";
-
- // Set the right(new) inset-owner of the paragraph if there is any.
- if (!undo.pars.empty()) {
- Inset * in = 0;
- if (before != null)
- in = before->inInset();
- else if (inset_id >= 0)
- in = bv->buffer()->getInsetFromID(inset_id);
- for (size_t i = 0, n = undo.pars.size(); i < n; ++i)
- undo.pars[i]->setInsetOwner(in);
- }
+ // Record the cursor position in a stable way.
+ int const cursor_offset = std::distance
+ (text->ownerParagraphs().begin(), text->cursor.par());
+ // Make and push the Undo entry
+ stack.push(Undo(kind, inset_id,
+ first_offset, last_offset,
+ cursor_offset, text->cursor.pos(),
+ ParagraphList()));
- // quick hack to make the common case work
- if (undo.pars.size() == 1 && boost::next(first) == after) {
- // first = *undo.pars[0];
- lyxerr << "could use special case...\n";
- }
+ // Record the relevant paragraphs
+ ParagraphList & undo_pars = stack.top().pars;
-#if 0
- // remove stuff between first and after
- plist->erase(first, after);
- // re-create first
- if (before == null) {
- // if there's no before take the beginning of parlist.
- first = plist->begin();
- } else {
- first = *before;
- ++first;
+ for (ParagraphList::iterator it = first; it != last; ++it) {
+ undo_pars.push_back(*it);
+ undo_pars.back().id(it->id());
}
+ undo_pars.push_back(*last);
+ undo_pars.back().id(last->id());
-#endif
-
- // inset saved paragraphs
- for (size_t i = 0, n = undo.pars.size(); i < n; ++i) {
- lyxerr << " inserting par " << undo.pars[i]->id() << "\n";
- lyxerr << " inserting plist: " << plist << "\n";
- //plist->insert(first, new Paragraph(*undo.pars[i], true));
- /*
- // 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;
- }
- */
- }
-
- // Set the cursor for redoing
- // if we have a par before the first.
- if (before != null) {
- Inset * it = before->inInset();
- if (it)
- it->getLyXText(bv)->setCursorIntern(*before, 0);
- else
- bv->text->setCursorIntern(*before, 0);
- }
-
- UpdatableInset * it = 0;
- if (first != plist->begin())
- it = static_cast<UpdatableInset*>(first->inInset());
-
- LyXText * text = it ? it->getLyXText(bv) : bv->text;
-
- text->redoParagraphs(text->cursor, plist->end());
+ // And make sure that next time, we should be combining if possible
+ undo_finished = false;
+}
- ParIterator tmppar = bv->buffer()->getParFromID(inset_id);
- if (tmppar != null) {
- LyXText * t;
- Inset * it = tmppar->inInset();
- if (it) {
- FuncRequest cmd(bv, LFUN_INSET_EDIT, "left");
- it->localDispatch(cmd);
- t = it->getLyXText(bv);
+// Returns false if no undo possible.
+bool performUndoOrRedo(BufferView * bv, Undo & undo)
+{
+ Buffer * buf = bv->buffer();
+ ParagraphList * plist = &buf->paragraphs;
+
+ // Remove new stuff between first and last
+ {
+ ParagraphList::iterator first = plist->begin();
+ advance(first, undo.first_par_offset);
+ ParagraphList::iterator last = plist->begin();
+ advance(last, plist->size() - undo.last_par_offset);
+ plist->erase(first, ++last);
+ }
+
+ // Re-insert old stuff instead
+ {
+ if (plist->empty()) {
+ plist->assign(undo.pars.begin(), undo.pars.end());
} else {
- t = bv->text;
+ ParagraphList::iterator first = plist->begin();
+ advance(first, undo.first_par_offset);
+ plist->insert(first, undo.pars.begin(), undo.pars.end());
}
- 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();
}
- if (it) {
- bv->fitCursor();
- bv->updateInset(it);
- bv->text->setCursorIntern(bv->text->cursor.par(),
- bv->text->cursor.pos());
- }
-
-
- finishUndo();
- bv->text->postPaint(0);
+ // Rebreak the entire document
+ bv->text->fullRebreak();
- return true;
-}
+ // set cursor
+ {
+ // Get a hold of the inset for the cursor, if relevant
+ UpdatableInset * inset =
+ static_cast<UpdatableInset *>(
+ buf->getInsetFromID(undo.inset_id));
+ LyXText * text = inset ? inset->getLyXText(bv) : bv->text;
+ ParagraphList::iterator cursor = text->ownerParagraphs().begin();
+ advance(cursor, undo.cursor_par_offset);
+ text->setCursorIntern(cursor, undo.cursor_pos);
-bool createUndo(BufferView * bv, Undo::undo_kind kind,
- ParagraphList::iterator itfirst, ParagraphList::iterator itlast,
- shared_ptr<Undo> & u)
-{
- Buffer * b = bv->buffer();
-
- ParIterator null = b->par_iterator_end();
- ParIterator prev = null;
- ParIterator before = null;
- ParIterator first = null;
- ParIterator last = null;
- ParIterator behind = null;
-
- int const first_id = itfirst->id();
- int const last_id = itlast->id();
-
- for (ParIterator it = b->par_iterator_begin(); it != null; ++it) {
- if ((*it)->id() == first_id) {
- first = it;
- before = prev;
- }
- if ((*it)->id() == last_id) {
- last = it;
- behind = last;
- ++behind;
+ if (inset) {
+ // Magic needed to update inset internal state
+ FuncRequest cmd(bv, LFUN_INSET_EDIT, "left");
+ inset->localDispatch(cmd);
}
- prev = it;
- }
- if (last == null)
- last = first;
-
- int const before_id = (before == null) ? -1 : before->id();
- int const behind_id = (behind == null) ? -1 : behind->id();
- int inset_id = (first->inInset()) ? first->inInset()->id() : -1;
-
- lyxerr << "\nbefore_id: " << before_id << "\n";
- lyxerr << "first_id: " << first_id << "\n";
- lyxerr << "last_id: " << last_id << "\n";
- lyxerr << "behind_id: " << behind_id << "\n";
- lyxerr << "inset_id: " << inset_id << "\n";
-
- ParagraphList * plist = 0;
- if (first != null)
- plist = &first.plist();
- else if (behind != null)
- plist = &behind.plist();
- else if (!plist) {
- lyxerr << "plist from buffer (should this happen?)\n";
- plist = &b->paragraphs;
- }
+ // set cursor again to force the position to be the right one
+ text->setCursorIntern(cursor, undo.cursor_pos);
- // 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 whether storing is needed.
- if (!b->undostack.empty() &&
- b->undostack.top()->kind == kind &&
- b->undostack.top()->number_of_before_par == before_id &&
- b->undostack.top()->number_of_behind_par == behind_id) {
- // No undo needed.
- return false;
- }
+ // Clear any selection and set the selection
+ // cursor for any new selection.
+ text->clearSelection();
+ text->selection.cursor = text->cursor;
+ text->updateCounters();
}
- // Create a new Undo.
- std::vector<Paragraph *> undo_pars;
-
- for (ParagraphList::iterator it = *first; it != *last; ++it)
- undo_pars.push_back(new Paragraph(*it, true));
- undo_pars.push_back(new Paragraph(**last, true));
-
- // A memory optimization: Just store the layout
- // information when only edit.
-#warning Waste...
- //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();
-
- u.reset(new Undo(kind, inset_id,
- before_id, behind_id, cursor_par, cursor_pos, undo_pars));
-
- undo_finished = false;
+ finishUndo();
return true;
}
// Returns false if no undo possible.
bool textUndoOrRedo(BufferView * bv,
- limited_stack<boost::shared_ptr<Undo> > & stack,
- limited_stack<boost::shared_ptr<Undo> > & /*otherstack*/)
+ limited_stack<Undo> & stack,
+ limited_stack<Undo> & otherstack)
{
- //Buffer * b = bv->buffer();
-
if (stack.empty()) {
- finishNoUndo(bv);
+ /*
+ * Finish the undo operation in the case there was no entry
+ * on the stack to perform.
+ */
+ freezeUndo();
+ bv->unlockInset(bv->theLockingInset());
+ finishUndo();
+ unFreezeUndo();
return false;
}
- shared_ptr<Undo> undo = stack.top();
+ 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);
+ otherstack.push(undo);
+ otherstack.top().pars.clear();
+ Buffer * buf = bv->buffer();
+ ParagraphList & plist = buf->paragraphs;
+ if (undo.first_par_offset + undo.last_par_offset <= int(plist.size())) {
+ ParagraphList::iterator first = plist.begin();
+ advance(first, undo.first_par_offset);
+ ParagraphList::iterator last = plist.begin();
+ advance(last, plist.size() - undo.last_par_offset + 1);
+ otherstack.top().pars.insert(otherstack.top().pars.begin(), first, last);
}
-*/
}
- // Now we can unlock the inset for saftey because the inset
+ // Now we can unlock the inset for safety 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());
+ bool const ret = performUndoOrRedo(bv, undo);
unFreezeUndo();
return ret;
}
} // namespace anon
-void finishUndo()
-{
- // Makes sure the next operation will be stored.
- undo_finished = true;
-}
-
-
void freezeUndo()
{
// This is dangerous and for internal use only.
}
+void finishUndo()
+{
+ // Makes sure the next operation will be stored.
+ undo_finished = true;
+}
+
+
bool textUndo(BufferView * bv)
{
return textUndoOrRedo(bv, bv->buffer()->undostack,
}
-void setUndo(BufferView * bv, Undo::undo_kind kind,
- ParagraphList::iterator first)
-{
- setUndo(bv, kind, first, first);
-}
-
-
-void setUndo(BufferView * bv, Undo::undo_kind kind,
+void recordUndo(BufferView * bv, Undo::undo_kind kind,
ParagraphList::iterator first, ParagraphList::iterator last)
{
-#warning DISABLED
- //return;
if (!undo_frozen) {
- shared_ptr<Undo> u;
- if (createUndo(bv, kind, first, last, u))
- bv->buffer()->undostack.push(u);
+ recordUndo(bv, kind, first, last, bv->buffer()->undostack);
bv->buffer()->redostack.clear();
}
}
-void setCursorParUndo(BufferView * bv)
+void recordUndo(BufferView * bv, Undo::undo_kind kind,
+ ParagraphList::iterator first)
{
- setUndo(bv, Undo::FINISH, bv->text->cursor.par());
+ recordUndo(bv, kind, first, first);
}
+
+
+void recordUndo(BufferView * bv, Undo::undo_kind kind)
+{
+ recordUndo(bv, kind, bv->text->cursor.par());
+}
+
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