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
ParagraphList paragraphs;
textclass_type textclass = 0;
} // namespace anon
bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
int start, int & end, textclass_type 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, textclass_type tc)
{
if (!startpar || (start > startpar->size()))
return false;
paragraphs.clear();
textclass = tc;
if (!endpar || startpar == endpar) {
// only within one paragraph
ParagraphList::iterator buf =
paragraphs.insert(paragraphs.begin(), 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;
while (tmppar != endpar) {
Paragraph * newpar = new Paragraph(*tmppar, false);
// reset change info
newpar->cleanChanges();
newpar->setInsetOwner(0);
paragraphs.push_back(newpar);
tmppar = tmppar->next();
}
// The first paragraph is too big.
Paragraph & front = paragraphs.front();
pos_type tmpi2 = start;
for (; tmpi2; --tmpi2)
front.erase(0);
// Now last paragraph is too big, delete all after end.
Paragraph & back = paragraphs.back();
tmpi2 = end;
while (back.size() > tmpi2) {
back.erase(back.size() - 1);
}
}
return true;
}
bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
int & pos, textclass_type tc)
{
if (!checkPastePossible())
return false;
if (pos > (*par)->size())
pos = (*par)->size();
// many paragraphs
// make a copy of the simple cut_buffer
#if 1
ParagraphList::iterator it = paragraphs.begin();
ParagraphList simple_cut_clone;
simple_cut_clone.insert(simple_cut_clone.begin(),
new Paragraph(*it, false));
ParagraphList::iterator end = paragraphs.end();
while (boost::next(it) != end) {
++it;
simple_cut_clone.insert(simple_cut_clone.end(),
new Paragraph(*it, false));
}
#else
// Later we want it done like this:
ParagraphList simple_cut_clone(paragraphs.begin(),
paragraphs.end());
#endif
// now remove all out of the buffer which is NOT allowed in the
// new environment and set also another font if that is required
ParagraphList::iterator tmpbuf = paragraphs.begin();
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 != paragraphs.end()) {
// 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 ((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
paragraphs.begin()->previous(0);
// make the buf exactly the same layout than
// the cursor paragraph
paragraphs.begin()->makeSameLayout(*par);
// find the end of the buffer
ParagraphList::iterator lastbuffer = paragraphs.begin();
while (boost::next(lastbuffer) != paragraphs.end())
++lastbuffer;
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(&*paragraphs.begin());
paragraphs.begin()->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
paragraphs = simple_cut_clone;
return true;
}
int CutAndPaste::nrOfParagraphs()
{
return paragraphs.size();
}
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()
{
return !paragraphs.empty();
}