lyx_mirror/src/CutAndPaste.C

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/* This file is part of
* ======================================================
*
* LyX, The Document Processor
*
* Copyright 1995-2001 The LyX Team.
*
* ====================================================== */
#include <config.h>
#include "CutAndPaste.h"
#include "BufferView.h"
#include "buffer.h"
#include "paragraph.h"
#include "ParagraphParameters.h"
#include "lyxtext.h"
#include "lyxcursor.h"
#include "gettext.h"
#include "iterators.h"
#include "lyxtextclasslist.h"
#include "undo_funcs.h"
#include "paragraph_funcs.h"
#include "debug.h"
#include "insets/inseterror.h"
#include "BoostFormat.h"
using std::endl;
using std::pair;
using lyx::pos_type;
using lyx::textclass_type;
extern BufferView * current_view;
// J<>rgen, note that this means that you cannot currently have a list
// of selections cut/copied. So IMHO later we should have a
// list/vector/deque that we could store
// struct selection_item {
// Paragraph * buf;
// LyXTextClassList::size_type textclass;
// };
// in and some method of choosing beween them (based on the first few chars
// in the selection probably.) This would be a nice feature and quite
// easy to implement. (Lgb)
//
// Sure but I just cleaned up this code for now with the same functionality
// as before. I also want to add a XClipboard function so that we can copy
// text from LyX to some other X-application in the form of ASCII or in the
// form of LaTeX (or Docbook depending on the document-class!). Think how nice
// it could be to select a math-inset do a "Copy to X-Clipboard as LaTeX" and
// then do a middle mouse button click in the application you want and have
// the whole formula there in LaTeX-Code. (Jug)
namespace {
// FIXME: stupid name
Paragraph * buf = 0;
textclass_type textclass = 0;
// for now here this should be in another Cut&Paste Class!
// J<>rgen, I moved this out of CutAndPaste since it does not operate on any
// member of the CutAndPaste class and in addition it was private.
// Perhaps it even should take a parameter? (Lgb)
void DeleteBuffer()
{
if (!buf)
return;
Paragraph * tmppar;
while (buf) {
tmppar = buf;
buf = buf->next();
delete tmppar;
}
buf = 0;
}
} // namespace anon
bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
int start, int & end, char tc, bool doclear,
bool realcut)
{
if (!startpar || (start > startpar->size()))
return false;
if (realcut) {
copySelection(startpar, *endpar, start, end, tc);
}
if (!endpar || startpar == *endpar) {
if (startpar->erase(start, end)) {
// Some chars were erased, go to start to be safe
end = start;
}
return true;
}
bool actually_erased = false;
// clear end/begin fragments of the first/last par in selection
actually_erased |= (startpar)->erase(start, startpar->size());
if ((*endpar)->erase(0, end)) {
actually_erased = true;
end = 0;
}
// Loop through the deleted pars if any, erasing as needed
Paragraph * pit = startpar->next();
while (true) {
// *endpar can be 0
if (!pit)
break;
Paragraph * next = pit->next();
// "erase" the contents of the par
if (pit != *endpar) {
actually_erased |= pit->erase(0, pit->size());
// remove the par if it's now empty
if (actually_erased) {
pit->previous()->next(pit->next());
if (next) {
next->previous(pit->previous());
}
delete pit;
}
}
if (pit == *endpar)
break;
pit = next;
}
#if 0 // FIXME: why for cut but not copy ?
// the cut selection should begin with standard layout
if (realcut) {
buf->params().clear();
buf->bibkey = 0;
buf->layout(textclasslist[buffer->params.textclass].defaultLayoutName());
}
#endif
if (!startpar->next())
return true;
Buffer * buffer = current_view->buffer();
if (doclear) {
startpar->next()->stripLeadingSpaces();
}
if (!actually_erased)
return true;
// paste the paragraphs again, if possible
if (startpar->hasSameLayout(startpar->next()) ||
startpar->next()->empty()) {
#warning This is suspect. (Lgb)
// When doing this merge we must know if the par really
// belongs to an inset, and if it does then we have to use
// the insets paragraphs, and not the buffers. (Lgb)
mergeParagraph(buffer->params, buffer->paragraphs, startpar);
// this because endpar gets deleted here!
(*endpar) = startpar;
}
return true;
}
bool CutAndPaste::copySelection(Paragraph * startpar, Paragraph * endpar,
int start, int end, char tc)
{
if (!startpar || (start > startpar->size()))
return false;
DeleteBuffer();
textclass = tc;
if (!endpar || startpar == endpar) {
// only within one paragraph
buf = new Paragraph;
buf->layout(startpar->layout());
pos_type i = start;
if (end > startpar->size())
end = startpar->size();
for (; i < end; ++i) {
startpar->copyIntoMinibuffer(*current_view->buffer(), i);
buf->insertFromMinibuffer(buf->size());
}
} else {
// copy more than one paragraph
// clone the paragraphs within the selection
Paragraph * tmppar = startpar;
buf = new Paragraph(*tmppar, false);
Paragraph * tmppar2 = buf;
tmppar2->cleanChanges();
while (tmppar != endpar
&& tmppar->next()) {
tmppar = tmppar->next();
tmppar2->next(new Paragraph(*tmppar, false));
tmppar2->next()->previous(tmppar2);
tmppar2 = tmppar2->next();
// reset change info
tmppar2->cleanChanges();
}
tmppar2->next(0);
// the buf paragraph is too big
pos_type tmpi2 = start;
for (; tmpi2; --tmpi2)
buf->erase(0);
// now tmppar 2 is too big, delete all after end
tmpi2 = end;
while (tmppar2->size() > tmpi2) {
tmppar2->erase(tmppar2->size() - 1);
}
// this paragraph's are of noone's owner!
tmppar = buf;
while (tmppar) {
tmppar->setInsetOwner(0);
tmppar = tmppar->next();
}
}
return true;
}
bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
int & pos, char tc)
{
if (!checkPastePossible(*par))
return false;
if (pos > (*par)->size())
pos = (*par)->size();
#if 0
// Paragraph * tmpbuf;
Paragraph * tmppar = *par;
int tmppos = pos;
// There are two cases: cutbuffer only one paragraph or many
if (!buf->next()) {
// only within a paragraph
Paragraph * tmpbuf = new Paragraph(*buf, false);
// Some provisions should be done here for checking
// if we are inserting at the beginning of a
// paragraph. If there are a space at the beginning
// of the text to insert and we are inserting at
// the beginning of the paragraph the space should
// be removed.
while (buf->size()) {
// This is an attempt to fix the
// "never insert a space at the
// beginning of a paragraph" problem.
if (!tmppos && buf->isLineSeparator(0)) {
buf->erase(0);
} else {
buf->cutIntoMinibuffer(current_view->buffer()->params, 0);
buf->erase(0);
if (tmppar->insertFromMinibuffer(tmppos))
++tmppos;
}
}
delete buf;
buf = tmpbuf;
*endpar = tmppar->next();
pos = tmppos;
} else
#endif
{
// many paragraphs
// make a copy of the simple cut_buffer
Paragraph * tmpbuf = buf;
Paragraph * simple_cut_clone = new Paragraph(*tmpbuf, false);
Paragraph * tmpbuf2 = simple_cut_clone;
while (tmpbuf->next()) {
tmpbuf = tmpbuf->next();
tmpbuf2->next(new Paragraph(*tmpbuf, false));
tmpbuf2->next()->previous(tmpbuf2);
tmpbuf2 = tmpbuf2->next();
}
// now remove all out of the buffer which is NOT allowed in the
// new environment and set also another font if that is required
tmpbuf = buf;
int depth_delta = (*par)->params().depth() - tmpbuf->params().depth();
// temporary set *par as previous of tmpbuf as we might have to realize
// the font.
tmpbuf->previous(*par);
// make sure there is no class difference
SwitchLayoutsBetweenClasses(textclass, tc, tmpbuf,
current_view->buffer()->params);
Paragraph::depth_type max_depth = (*par)->getMaxDepthAfter();
while(tmpbuf) {
// if we have a negative jump so that the depth would go below
// 0 depth then we have to redo the delta to this new max depth
// level so that subsequent paragraphs are aligned correctly to
// this paragraph at level 0.
if ((static_cast<int>(tmpbuf->params().depth()) + depth_delta) < 0)
depth_delta = 0;
// set the right depth so that we are not too deep or shallow.
tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
if (tmpbuf->params().depth() > max_depth)
tmpbuf->params().depth(max_depth);
// only set this from the 2nd on as the 2nd depends for maxDepth
// still on *par
if (tmpbuf->previous() != (*par))
max_depth = tmpbuf->getMaxDepthAfter();
// set the inset owner of this paragraph
tmpbuf->setInsetOwner((*par)->inInset());
for(pos_type i = 0; i < tmpbuf->size(); ++i) {
if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
if (!(*par)->insetAllowed(tmpbuf->getInset(i)->lyxCode()))
{
tmpbuf->erase(i--);
}
} else {
LyXFont f1 = tmpbuf->getFont(current_view->buffer()->params,i);
LyXFont f2 = f1;
if (!(*par)->checkInsertChar(f1)) {
tmpbuf->erase(i--);
} else if (f1 != f2) {
tmpbuf->setFont(i, f1);
}
}
}
tmpbuf = tmpbuf->next();
}
// now reset it to 0
buf->previous(0);
// make the buf exactly the same layout than
// the cursor paragraph
buf->makeSameLayout(*par);
// find the end of the buffer
Paragraph * lastbuffer = buf;
while (lastbuffer->next())
lastbuffer = lastbuffer->next();
bool paste_the_end = false;
// open the paragraph for inserting the buf
// if necessary
if (((*par)->size() > pos) || !(*par)->next()) {
breakParagraphConservative(
current_view->buffer()->params, current_view->buffer()->paragraphs, *par, pos);
paste_the_end = true;
}
// set the end for redoing later
*endpar = (*par)->next()->next();
// paste it!
lastbuffer->next((*par)->next());
(*par)->next()->previous(lastbuffer);
(*par)->next(buf);
buf->previous(*par);
if ((*par)->next() == lastbuffer)
lastbuffer = *par;
mergeParagraph(current_view->buffer()->params,
current_view->buffer()->paragraphs, *par);
// store the new cursor position
*par = lastbuffer;
pos = lastbuffer->size();
// maybe some pasting
if (lastbuffer->next() && paste_the_end) {
if (lastbuffer->next()->hasSameLayout(lastbuffer)) {
mergeParagraph(current_view->buffer()->params,
current_view->buffer()->paragraphs, lastbuffer);
} else if (!lastbuffer->next()->size()) {
lastbuffer->next()->makeSameLayout(lastbuffer);
mergeParagraph(current_view->buffer()->params, current_view->buffer()->paragraphs, lastbuffer);
} else if (!lastbuffer->size()) {
lastbuffer->makeSameLayout(lastbuffer->next());
mergeParagraph(current_view->buffer()->params,
current_view->buffer()->paragraphs, lastbuffer);
} else
lastbuffer->next()->stripLeadingSpaces();
}
// restore the simple cut buffer
buf = simple_cut_clone;
}
return true;
}
int CutAndPaste::nrOfParagraphs()
{
if (!buf)
return 0;
int n = 1;
Paragraph * tmppar = buf;
while (tmppar->next()) {
++n;
tmppar = tmppar->next();
}
return n;
}
int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
textclass_type c2,
Paragraph * par,
BufferParams const & /*bparams*/)
{
int ret = 0;
if (!par || c1 == c2)
return ret;
LyXTextClass const & tclass1 = textclasslist[c1];
LyXTextClass const & tclass2 = textclasslist[c2];
ParIterator end = ParIterator();
for (ParIterator it = ParIterator(par); it != end; ++it) {
par = *it;
string const name = par->layout()->name();
bool hasLayout = tclass2.hasLayout(name);
if (hasLayout)
par->layout(tclass2[name]);
else
par->layout(tclass2.defaultLayout());
if (!hasLayout && name != tclass1.defaultLayoutName()) {
++ret;
#if USE_BOOST_FORMAT
boost::format fmt(_("Layout had to be changed from\n"
"%1$s to %2$s\n"
"because of class conversion from\n"
"%3$s to %4$s"));
fmt % name
% par->layout()->name()
% tclass1.name()
% tclass2.name();
string const s = fmt.str();
#else
string const s = _("Layout had to be changed from\n")
+ name + _(" to ")
+ par->layout()->name()
+ _("\nbecause of class conversion from\n")
+ tclass1.name() + _(" to ")
+ tclass2.name();
#endif
freezeUndo();
InsetError * new_inset = new InsetError(s);
LyXText * txt = current_view->getLyXText();
LyXCursor cur = txt->cursor;
txt->setCursorIntern(current_view, par, 0);
txt->insertInset(current_view, new_inset);
txt->fullRebreak(current_view);
txt->setCursorIntern(current_view, cur.par(), cur.pos());
unFreezeUndo();
}
}
return ret;
}
bool CutAndPaste::checkPastePossible(Paragraph *)
{
if (!buf) return false;
return true;
}