lyx_mirror/src/frontends/qt4/GuiSpellchecker.cpp

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/**
* \file GuiSpellchecker.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Edwin Leuven
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "GuiSpellchecker.h"
#include "qt_helpers.h"
#include "Buffer.h"
#include "BufferParams.h"
#include "BufferView.h"
#include "Cursor.h"
#include "CutAndPaste.h"
#include "Language.h"
#include "LyXRC.h"
#include "Paragraph.h"
#include "support/debug.h"
#include "support/docstring.h"
#include "support/gettext.h"
#include "support/lstrings.h"
#include "support/textutils.h"
#include <QListWidgetItem>
#if defined(USE_ASPELL)
# include "ASpell_local.h"
#elif defined(USE_PSPELL)
# include "PSpell.h"
#endif
#if defined(USE_ISPELL)
# include "ISpell.h"
#else
# include "SpellBase.h"
#endif
#include "frontends/alert.h"
using namespace std;
using namespace lyx::support;
namespace lyx {
namespace frontend {
GuiSpellchecker::GuiSpellchecker(GuiView & lv)
: GuiDialog(lv, "spellchecker", qt_("Spellchecker")), exitEarly_(false),
oldval_(0), newvalue_(0), count_(0), speller_(0)
{
setupUi(this);
connect(closePB, SIGNAL(clicked()), this, SLOT(slotClose()));
connect(replacePB, SIGNAL(clicked()), this, SLOT(replace()));
connect(ignorePB, SIGNAL(clicked()), this, SLOT(ignore()));
connect(replacePB_3, SIGNAL(clicked()), this, SLOT(accept()));
connect(addPB, SIGNAL(clicked()), this, SLOT(add()));
connect(replaceCO, SIGNAL(highlighted(QString)),
this, SLOT(replaceChanged(QString)));
connect(suggestionsLW, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
this, SLOT(replace()));
connect(suggestionsLW, SIGNAL(itemClicked(QListWidgetItem*)),
this, SLOT(suggestionChanged(QListWidgetItem*)));
wordED->setReadOnly(true);
bc().setPolicy(ButtonPolicy::NoRepeatedApplyReadOnlyPolicy);
bc().setCancel(closePB);
}
GuiSpellchecker::~GuiSpellchecker()
{
delete speller_;
}
void GuiSpellchecker::suggestionChanged(QListWidgetItem * item)
{
if (replaceCO->count() != 0)
replaceCO->setItemText(0, item->text());
else
replaceCO->addItem(item->text());
replaceCO->setCurrentIndex(0);
}
void GuiSpellchecker::replaceChanged(const QString & str)
{
if (suggestionsLW->currentItem()->text() == str)
return;
for (int i = 0; i != suggestionsLW->count(); ++i) {
if (suggestionsLW->item(i)->text() == str) {
suggestionsLW->setCurrentRow(i);
break;
}
}
}
void GuiSpellchecker::reject()
{
slotClose();
QDialog::reject();
}
void GuiSpellchecker::updateContents()
{
// The clauses below are needed because the spellchecker
// has many flaws (see bugs 1950, 2218).
// Basically, we have to distinguish the case where a
// spellcheck has already been performed for the whole
// document (exitEarly() == true, isVisible() == false)
// from the rest (exitEarly() == false, isVisible() == true).
// FIXME: rewrite the whole beast!
static bool check_after_early_exit;
if (exitEarly()) {
// a spellcheck has already been performed,
check();
check_after_early_exit = true;
}
else if (isVisible()) {
// the above check triggers a second update,
// and isVisible() is true then. Prevent a
// second check that skips the first word
if (check_after_early_exit)
// don't check, but reset the bool.
// business as usual after this.
check_after_early_exit = false;
else
// perform spellcheck (default case)
check();
}
}
void GuiSpellchecker::accept()
{
ignoreAll();
}
void GuiSpellchecker::add()
{
insert();
}
void GuiSpellchecker::ignore()
{
check();
}
void GuiSpellchecker::replace()
{
replace(qstring_to_ucs4(replaceCO->currentText()));
}
void GuiSpellchecker::partialUpdate(int state)
{
switch (state) {
case SPELL_PROGRESSED:
spellcheckPR->setValue(getProgress());
break;
case SPELL_FOUND_WORD: {
wordED->setText(toqstr(getWord()));
suggestionsLW->clear();
docstring w;
while (!(w = getSuggestion()).empty())
suggestionsLW->addItem(toqstr(w));
if (suggestionsLW->count() == 0)
suggestionChanged(new QListWidgetItem(wordED->text()));
else
suggestionChanged(suggestionsLW->item(0));
suggestionsLW->setCurrentRow(0);
break;
}
}
}
static SpellBase * createSpeller(BufferParams const & bp)
{
string lang = (lyxrc.isp_use_alt_lang)
? lyxrc.isp_alt_lang
: bp.language->code();
#if defined(USE_ASPELL)
if (lyxrc.use_spell_lib)
return new ASpell(bp, lang);
#elif defined(USE_PSPELL)
if (lyxrc.use_spell_lib)
return new PSpell(bp, lang);
#endif
#if defined(USE_ISPELL)
lang = lyxrc.isp_use_alt_lang ?
lyxrc.isp_alt_lang : bp.language->lang();
return new ISpell(bp, lang);
#else
return new SpellBase;
#endif
}
bool GuiSpellchecker::initialiseParams(string const &)
{
LYXERR(Debug::GUI, "Spellchecker::initialiseParams");
speller_ = createSpeller(buffer().params());
if (!speller_)
return false;
// reset values to initial
oldval_ = 0;
newvalue_ = 0;
count_ = 0;
bool const success = speller_->error().empty();
if (!success) {
Alert::error(_("Spellchecker error"),
_("The spellchecker could not be started\n")
+ speller_->error());
delete speller_;
speller_ = 0;
}
return success;
}
void GuiSpellchecker::clearParams()
{
LYXERR(Debug::GUI, "Spellchecker::clearParams");
delete speller_;
speller_ = 0;
}
static bool isLetter(DocIterator const & dit)
{
return dit.inTexted()
&& dit.inset().allowSpellCheck()
&& dit.pos() != dit.lastpos()
&& (dit.paragraph().isLetter(dit.pos())
// We want to pass the ' and escape chars to ispell
|| contains(from_utf8(lyxrc.isp_esc_chars + '\''),
dit.paragraph().getChar(dit.pos())))
&& !dit.paragraph().isDeleted(dit.pos());
}
static WordLangTuple nextWord(Cursor & cur, ptrdiff_t & progress)
{
BufferParams const & bp = cur.bv().buffer().params();
bool inword = false;
bool ignoreword = false;
cur.resetAnchor();
docstring word;
string lang_code;
while (cur.depth()) {
if (isLetter(cur)) {
if (!inword) {
inword = true;
ignoreword = false;
cur.resetAnchor();
word.clear();
lang_code = cur.paragraph().getFontSettings(bp, cur.pos()).language()->code();
}
// Insets like optional hyphens and ligature
// break are part of a word.
if (!cur.paragraph().isInset(cur.pos())) {
char_type const c = cur.paragraph().getChar(cur.pos());
word += c;
if (isDigit(c))
ignoreword = true;
}
} else { // !isLetter(cur)
if (inword)
if (!word.empty() && !ignoreword) {
cur.setSelection();
return WordLangTuple(word, lang_code);
}
inword = false;
}
cur.forwardPos();
++progress;
}
return WordLangTuple(docstring(), string());
}
void GuiSpellchecker::check()
{
LYXERR(Debug::GUI, "Check the spelling of a word");
SpellBase::Result res = SpellBase::OK;
Cursor cur = bufferview()->cursor();
while (cur && cur.pos() && isLetter(cur))
cur.backwardPos();
ptrdiff_t start = 0;
ptrdiff_t total = 0;
DocIterator it = doc_iterator_begin(buffer().inset());
for (start = 1; it != cur; it.forwardPos())
++start;
for (total = start; it; it.forwardPos())
++total;
exitEarly_ = false;
while (res == SpellBase::OK || res == SpellBase::IGNORED_WORD) {
word_ = nextWord(cur, start);
// end of document
if (getWord().empty()) {
showSummary();
exitEarly_ = true;
return;
}
++count_;
// Update slider if and only if value has changed
float progress = total ? float(start)/total : 1;
newvalue_ = int(100.0 * progress);
if (newvalue_!= oldval_) {
LYXERR(Debug::GUI, "Updating spell progress.");
oldval_ = newvalue_;
// set progress bar
partialUpdate(SPELL_PROGRESSED);
}
// speller might be dead ...
if (!checkAlive())
return;
res = speller_->check(word_);
// ... or it might just be reporting an error
if (!checkAlive())
return;
}
LYXERR(Debug::GUI, "Found word \"" << to_utf8(getWord()) << "\"");
int const size = cur.selEnd().pos() - cur.selBegin().pos();
cur.pos() -= size;
BufferView * bv = const_cast<BufferView *>(bufferview());
bv->putSelectionAt(cur, size, false);
// FIXME: if we used a lfun like in find/replace, dispatch would do
// that for us
// FIXME: this Controller is very badly designed...
bv->processUpdateFlags(Update::Force | Update::FitCursor);
// set suggestions
if (res != SpellBase::OK && res != SpellBase::IGNORED_WORD) {
LYXERR(Debug::GUI, "Found a word needing checking.");
partialUpdate(SPELL_FOUND_WORD);
}
}
bool GuiSpellchecker::checkAlive()
{
if (speller_->alive() && speller_->error().empty())
return true;
docstring message;
if (speller_->error().empty())
message = _("The spellchecker has died for some reason.\n"
"Maybe it has been killed.");
else
message = _("The spellchecker has failed.\n") + speller_->error();
slotClose();
Alert::error(_("The spellchecker has failed"), message);
return false;
}
void GuiSpellchecker::showSummary()
{
if (!checkAlive() || count_ == 0) {
slotClose();
return;
}
docstring message;
if (count_ != 1)
message = bformat(_("%1$d words checked."), count_);
else
message = _("One word checked.");
slotClose();
Alert::information(_("Spelling check completed"), message);
}
void GuiSpellchecker::replace(docstring const & replacement)
{
LYXERR(Debug::GUI, "GuiSpellchecker::replace("
<< to_utf8(replacement) << ")");
BufferView * bv = const_cast<BufferView *>(bufferview());
cap::replaceSelectionWithString(bv->cursor(), replacement, true);
bv->buffer().markDirty();
// If we used an LFUN, we would not need that
bv->processUpdateFlags(Update::Force | Update::FitCursor);
// fix up the count
--count_;
check();
}
void GuiSpellchecker::replaceAll(docstring const & replacement)
{
// TODO: add to list
replace(replacement);
}
void GuiSpellchecker::insert()
{
speller_->insert(word_);
check();
}
docstring GuiSpellchecker::getSuggestion() const
{
return speller_->nextMiss();
}
docstring GuiSpellchecker::getWord() const
{
return word_.word();
}
void GuiSpellchecker::ignoreAll()
{
speller_->accept(word_);
check();
}
Dialog * createGuiSpellchecker(GuiView & lv) { return new GuiSpellchecker(lv); }
} // namespace frontend
} // namespace lyx
#include "GuiSpellchecker_moc.cpp"