src/buffer_funcs.cpp

   1 /**
   2  * \file buffer_funcs.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Alfredo Braunstein
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  *
  11  */
  12
  13 #include <config.h>
  14
  15 #include "buffer_funcs.h"
  16 #include "Buffer.h"
  17 #include "BufferList.h"
  18 #include "BufferParams.h"
  19 #include "DocIterator.h"
  20 #include "Counters.h"
  21 #include "ErrorList.h"
  22 #include "Floating.h"
  23 #include "FloatList.h"
  24 #include "InsetList.h"
  25 #include "Language.h"
  26 #include "LaTeX.h"
  27 #include "Layout.h"
  28 #include "LyX.h"
  29 #include "TextClass.h"
  30 #include "Paragraph.h"
  31 #include "ParagraphList.h"
  32 #include "ParagraphParameters.h"
  33 #include "ParIterator.h"
  34 #include "TexRow.h"
  35 #include "Text.h"
  36 #include "TocBackend.h"
  37
  38 #include "frontends/alert.h"
  39
  40 #include "insets/InsetBibitem.h"
  41 #include "insets/InsetInclude.h"
  42
  43 #include "support/lassert.h"
  44 #include "support/convert.h"
  45 #include "support/debug.h"
  46 #include "support/filetools.h"
  47 #include "support/gettext.h"
  48 #include "support/lstrings.h"
  49 #include "support/textutils.h"
  50
  51 using namespace std;
  52 using namespace lyx::support;
  53
  54 namespace lyx {
  55
  56 namespace Alert = frontend::Alert;
  57
  58
  59 Buffer * checkAndLoadLyXFile(FileName const & filename, bool const acceptDirty)
  60 {
  61         // File already open?
  62         Buffer * checkBuffer = theBufferList().getBuffer(filename);
  63         if (checkBuffer) {
  64                 // Sometimes (when setting the master buffer from a child)
  65                 // we accept a dirty buffer right away (otherwise we'd get
  66                 // an infinite loop (bug 5514).
  67                 // We also accept a dirty buffer when the document has not
  68                 // yet been saved to disk.
  69                 if (checkBuffer->isClean() || acceptDirty || !filename.exists())
  70                         return checkBuffer;
  71                 docstring const file = makeDisplayPath(filename.absFileName(), 20);
  72                 docstring const text = bformat(_(
  73                                 "The document %1$s is already loaded and has unsaved changes.\n"
  74                                 "Do you want to abandon your changes and reload the version on disk?"), file);
  75                 if (!Alert::prompt(_("Reload saved document?"),
  76                           text, 0, 1,  _("&Reload"), _("&Keep Changes"))) {
  77                         // reload the document
  78                         if (checkBuffer->reload() != Buffer::ReadSuccess)
  79                                 return 0;
  80                 }
  81                 return checkBuffer;
  82         }
  83
  84         if (filename.exists()) {
  85                 if (!filename.isReadableFile()) {
  86                         docstring text = bformat(_("The file %1$s exists but is not "
  87                                 "readable by the current user."),
  88                                 from_utf8(filename.absFileName()));
  89                         Alert::error(_("File not readable!"), text);
  90                         return 0;
  91                 }
  92                 Buffer * b = theBufferList().newBuffer(filename.absFileName());
  93                 if (!b) {
  94                         // Buffer creation is not possible.
  95                         return 0;
  96                 }
  97                 if (b->loadLyXFile() != Buffer::ReadSuccess) {
  98                         // do not save an emergency file when releasing the buffer
  99                         b->markClean();
 100                         theBufferList().release(b);
 101                         return 0;
 102                 }
 103                 return b;
 104         }
 105
 106         docstring text = bformat(_("The document %1$s does not yet "
 107                 "exist.\n\nDo you want to create a new document?"),
 108                 from_utf8(filename.absFileName()));
 109         if (!Alert::prompt(_("Create new document?"),
 110                         text, 0, 1, _("&Create"), _("Cancel")))
 111                 return newFile(filename.absFileName(), string(), true);
 112
 113         return 0;
 114 }
 115
 116
 117 // FIXME newFile() should probably be a member method of Application...
 118 Buffer * newFile(string const & filename, string const & templatename,
 119                  bool is_named)
 120 {
 121         // get a free buffer
 122         Buffer * b = theBufferList().newBuffer(filename);
 123         if (!b)
 124                 // Buffer creation is not possible.
 125                 return 0;
 126
 127         FileName tname;
 128         // use defaults.lyx as a default template if it exists.
 129         if (templatename.empty())
 130                 tname = libFileSearch("templates", "defaults.lyx");
 131         else
 132                 tname = makeAbsPath(templatename);
 133
 134         if (!tname.empty()) {
 135                 if (b->loadThisLyXFile(tname) != Buffer::ReadSuccess) {
 136                         docstring const file = makeDisplayPath(tname.absFileName(), 50);
 137                         docstring const text  = bformat(
 138                                 _("The specified document template\n%1$s\ncould not be read."),
 139                                 file);
 140                         Alert::error(_("Could not read template"), text);
 141                         theBufferList().release(b);
 142                         return 0;
 143                 }
 144         }
 145
 146         if (is_named)
 147                 // in this case, the user chose the filename, so we
 148                 // assume that she really does want this file.
 149                 b->markDirty();
 150         else
 151                 b->setUnnamed();
 152
 153         b->setReadonly(false);
 154         b->setFullyLoaded(true);
 155
 156         return b;
 157 }
 158
 159
 160 Buffer * newUnnamedFile(FileName const & path, string const & prefix,
 161                                                 string const & templatename)
 162 {
 163         static map<string, int> file_number;
 164
 165         FileName filename;
 166
 167         do {
 168                 filename.set(path,
 169                         prefix + convert<string>(++file_number[prefix]) + ".lyx");
 170         }
 171         while (theBufferList().exists(filename) || filename.isReadableFile());
 172
 173         return newFile(filename.absFileName(), templatename, false);
 174 }
 175
 176
 177 /*
 178  * FIXME : merge with countChars. The structures of the two functions
 179  * are similar but, unfortunately, they seem to have a different
 180  * notion of what to count. Since nobody ever complained about that,
 181  * this proves (again) that any number beats no number ! (JMarc)
 182  */
 183 int countWords(DocIterator const & from, DocIterator const & to)
 184 {
 185         int count = 0;
 186         bool inword = false;
 187         for (DocIterator dit = from ; dit != to ; ) {
 188                 if (!dit.inTexted()) {
 189                         dit.forwardPos();
 190                         continue;
 191                 }
 192
 193                 Paragraph const & par = dit.paragraph();
 194                 pos_type const pos = dit.pos();
 195
 196                 // Copied and adapted from isWordSeparator() in Paragraph
 197                 if (pos != dit.lastpos() && !par.isDeleted(pos)) {
 198                         Inset const * ins = par.getInset(pos);
 199                         if (ins && !ins->producesOutput()) {
 200                                 //skip this inset
 201                                 ++dit.top().pos();
 202                                 continue;
 203                         }
 204                         if (par.isWordSeparator(pos))
 205                                 inword = false;
 206                         else if (!inword) {
 207                                 ++count;
 208                                 inword = true;
 209                         }
 210                 }
 211                 dit.forwardPos();
 212         }
 213
 214         return count;
 215 }
 216
 217
 218 int countChars(DocIterator const & from, DocIterator const & to,
 219                bool with_blanks)
 220 {
 221         int chars = 0;
 222         int blanks = 0;
 223         for (DocIterator dit = from ; dit != to ; ) {
 224                 if (!dit.inTexted()) {
 225                         dit.forwardPos();
 226                         continue;
 227                 }
 228
 229                 Paragraph const & par = dit.paragraph();
 230                 pos_type const pos = dit.pos();
 231
 232                 if (pos != dit.lastpos() && !par.isDeleted(pos)) {
 233                         if (Inset const * ins = par.getInset(pos)) {
 234                                 if (!ins->producesOutput()) {
 235                                         //skip this inset
 236                                         ++dit.top().pos();
 237                                         continue;
 238                                 }
 239                                 if (ins->isLetter())
 240                                         ++chars;
 241                                 else if (with_blanks && ins->isSpace())
 242                                         ++blanks;
 243                         } else {
 244                                 char_type const c = par.getChar(pos);
 245                                 if (isPrintableNonspace(c))
 246                                         ++chars;
 247                                 else if (isSpace(c) && with_blanks)
 248                                         ++blanks;
 249                         }
 250                 }
 251                 dit.forwardPos();
 252         }
 253
 254         return chars + blanks;
 255 }
 256
 257
 258 Buffer * loadIfNeeded(FileName const & fname)
 259 {
 260         Buffer * buffer = theBufferList().getBuffer(fname);
 261         if (!buffer) {
 262                 if (!fname.exists())
 263                         return 0;
 264
 265                 buffer = theBufferList().newBuffer(fname.absFileName());
 266                 if (!buffer)
 267                         // Buffer creation is not possible.
 268                         return 0;
 269
 270                 if (buffer->loadLyXFile() != Buffer::ReadSuccess) {
 271                         //close the buffer we just opened
 272                         theBufferList().release(buffer);
 273                         return 0;
 274                 }
 275         }
 276         return buffer;
 277 }
 278
 279
 280 } // namespace lyx