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recoll/src/qtgui/preview_w.cpp

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#ifndef lint
static char rcsid[] = "@(#$Id: preview_w.cpp,v 1.17 2007-02-19 18:15:14 dockes Exp $ (C) 2005 J.F.Dockes";
#endif
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <unistd.h>
#include <time.h>
#include <sys/stat.h>
#include <list>
#include <utility>
#ifndef NO_NAMESPACES
using std::pair;
#endif /* NO_NAMESPACES */
#include <qmessagebox.h>
#include <qthread.h>
#include <qvariant.h>
#include <qpushbutton.h>
#include <qtabwidget.h>
#if (QT_VERSION < 0x040000)
#include <qtextedit.h>
#include <qprogressdialog.h>
#else
#include <q3textedit.h>
#include <q3progressdialog.h>
#include <q3stylesheet.h>
#endif
#include <qevent.h>
#include <qlabel.h>
#include <qlineedit.h>
#include <qcheckbox.h>
#include <qlayout.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include "qapplication.h"
#include "debuglog.h"
#include "pathut.h"
#include "internfile.h"
#include "recoll.h"
#include "plaintorich.h"
#include "smallut.h"
#include "wipedir.h"
#include "cancelcheck.h"
#include "preview_w.h"
#include "guiutils.h"
#if (QT_VERSION < 0x030300)
#define wasCanceled wasCancelled
#endif
void Preview::init()
{
#if 0
// Couldn't get a small button really in the corner. stays on the left of
// the button area and looks ugly
QPixmap px = QPixmap::fromMimeSource("cancel.png");
QPushButton * bt = new QPushButton(px, "", this);
bt->setFixedSize(px.size());
#else
QPushButton * bt = new QPushButton(tr("Close Tab"), this);
#endif
pvTab->setCornerWidget(bt);
// signals and slots connections
connect(searchTextLine, SIGNAL(textChanged(const QString&)),
this, SLOT(searchTextLine_textChanged(const QString&)));
connect(nextButton, SIGNAL(clicked()), this, SLOT(nextPressed()));
connect(prevButton, SIGNAL(clicked()), this, SLOT(prevPressed()));
connect(clearPB, SIGNAL(clicked()), searchTextLine, SLOT(clear()));
connect(pvTab, SIGNAL(currentChanged(QWidget *)),
this, SLOT(currentChanged(QWidget *)));
connect(bt, SIGNAL(clicked()), this, SLOT(closeCurrentTab()));
searchTextLine->installEventFilter(this);
pvEdit->installEventFilter(this);
dynSearchActive = false;
canBeep = true;
tabData.push_back(TabData(pvTab->currentPage()));
currentW = 0;
if (prefs.pvwidth > 100) {
resize(prefs.pvwidth, prefs.pvheight);
}
m_loading = false;
}
void Preview::destroy()
{
}
void Preview::closeEvent(QCloseEvent *e)
{
prefs.pvwidth = width();
prefs.pvheight = height();
emit previewExposed(m_searchId, -1);
emit previewClosed((QWidget *)this);
QWidget::closeEvent(e);
}
bool Preview::eventFilter(QObject *target, QEvent *event)
{
if (event->type() != QEvent::KeyPress)
return QWidget::eventFilter(target, event);
LOGDEB(("Preview::eventFilter: keyEvent\n"));
QKeyEvent *keyEvent = (QKeyEvent *)event;
if (keyEvent->key() == Qt::Key_Q &&
(keyEvent->state() & Qt::ControlButton)) {
recollNeedsExit = 1;
return true;
} else if (keyEvent->key() == Qt::Key_Escape) {
close();
return true;
} else if (keyEvent->key() == Qt::Key_Down &&
(keyEvent->state() & Qt::ShiftButton)) {
// LOGDEB(("Preview::eventFilter: got Shift-Up\n"));
TabData *d = tabDataForCurrent();
if (d)
emit(showNext(m_searchId, d->docnum));
return true;
} else if (keyEvent->key() == Qt::Key_Up &&
(keyEvent->state() & Qt::ShiftButton)) {
// LOGDEB(("Preview::eventFilter: got Shift-Down\n"));
TabData *d = tabDataForCurrent();
if (d)
emit(showPrev(m_searchId, d->docnum));
return true;
} else if (keyEvent->key() == Qt::Key_W &&
(keyEvent->state() & Qt::ControlButton)) {
// LOGDEB(("Preview::eventFilter: got ^W\n"));
closeCurrentTab();
return true;
} else if (dynSearchActive) {
if (keyEvent->key() == Qt::Key_F3) {
doSearch(searchTextLine->text(), true, false);
return true;
}
if (target != searchTextLine)
return QApplication::sendEvent(searchTextLine, event);
} else {
QWidget *tw = pvTab->currentPage();
QWidget *e = 0;
if (tw)
e = (QWidget *)tw->child("pvEdit");
LOGDEB1(("Widget: %p, edit %p, target %p\n", tw, e, target));
if (e && target == tw && keyEvent->key() == Qt::Key_Slash) {
searchTextLine->setFocus();
dynSearchActive = true;
return true;
}
}
return QWidget::eventFilter(target, event);
}
void Preview::searchTextLine_textChanged(const QString & text)
{
LOGDEB1(("search line text changed. text: '%s'\n", text.ascii()));
if (text.isEmpty()) {
dynSearchActive = false;
nextButton->setEnabled(false);
prevButton->setEnabled(false);
clearPB->setEnabled(false);
} else {
dynSearchActive = true;
nextButton->setEnabled(true);
prevButton->setEnabled(true);
clearPB->setEnabled(true);
doSearch(text, false, false);
}
}
#if (QT_VERSION >= 0x040000)
#define QTextEdit Q3TextEdit
#define QProgressDialog Q3ProgressDialog
#define QStyleSheetItem Q3StyleSheetItem
#endif
QTextEdit *Preview::getCurrentEditor()
{
QWidget *tw = pvTab->currentPage();
QTextEdit *edit = 0;
if (tw) {
edit = (QTextEdit*)tw->child("pvEdit");
}
return edit;
}
// Perform text search. If next is true, we look for the next match of the
// current search, trying to advance and possibly wrapping around. If next is
// false, the search string has been modified, we search for the new string,
// starting from the current position
void Preview::doSearch(const QString &text, bool next, bool reverse,
bool wordOnly)
{
LOGDEB1(("Preview::doSearch: [%s] next %d rev %d\n",
(const char *)text.utf8(), int(next), int(reverse)));
if (text.isEmpty())
return;
QTextEdit *edit = getCurrentEditor();
if (edit == 0) {
// ??
return;
}
bool matchCase = matchCheck->isChecked();
int mspara, msindex, mepara, meindex;
edit->getSelection(&mspara, &msindex, &mepara, &meindex);
if (mspara == -1)
mspara = msindex = mepara = meindex = 0;
if (next) {
// We search again, starting from the current match
if (reverse) {
// when searching backwards, have to move back one char
if (msindex > 0)
msindex --;
else if (mspara > 0) {
mspara --;
msindex = edit->paragraphLength(mspara);
}
} else {
// Forward search: start from end of selection
mspara = mepara;
msindex = meindex;
LOGDEB1(("New para: %d index %d\n", mspara, msindex));
}
}
bool found = edit->find(text, matchCase, wordOnly,
!reverse, &mspara, &msindex);
LOGDEB(("Found at para: %d index %d\n", mspara, msindex));
if (!found && next && true) { // need a 'canwrap' test here
if (reverse) {
mspara = edit->paragraphs();
msindex = edit->paragraphLength(mspara);
} else {
mspara = msindex = 0;
}
found = edit->find(text, matchCase, false, !reverse, &mspara, &msindex);
}
if (found) {
canBeep = true;
} else {
if (canBeep)
QApplication::beep();
canBeep = false;
}
}
void Preview::nextPressed()
{
doSearch(searchTextLine->text(), true, false);
}
void Preview::prevPressed()
{
doSearch(searchTextLine->text(), true, true);
}
// Called when user clicks on tab
void Preview::currentChanged(QWidget * tw)
{
QWidget *edit = (QWidget *)tw->child("pvEdit");
currentW = tw;
LOGDEB1(("Preview::currentChanged(). Editor: %p\n", edit));
if (edit == 0) {
LOGERR(("Editor child not found\n"));
} else {
tw->installEventFilter(this);
edit->installEventFilter(this);
edit->setFocus();
connect(edit, SIGNAL(doubleClicked(int, int)),
this, SLOT(textDoubleClicked(int, int)));
TabData *d = tabDataForCurrent();
if (d)
emit(previewExposed(m_searchId, d->docnum));
}
}
void Preview::textDoubleClicked(int, int)
{
if (!currentW)
return;
QTextEdit *edit = (QTextEdit *)currentW->child("pvEdit");
if (edit == 0) {
LOGERR(("Editor child not found\n"));
return;
}
if (edit->hasSelectedText())
emit(wordSelect(edit->selectedText()));
}
void Preview::closeCurrentTab()
{
if (m_loading)
return;
if (pvTab->count() > 1) {
QWidget *tw = pvTab->currentPage();
if (!tw)
return;
pvTab->removePage(tw);
// Have to remove from tab data list
for (list<TabData>::iterator it = tabData.begin();
it != tabData.end(); it++) {
if (it->w == tw) {
tabData.erase(it);
return;
}
}
} else {
close();
}
}
QTextEdit *Preview::addEditorTab()
{
QWidget *anon = new QWidget((QWidget *)pvTab);
QVBoxLayout *anonLayout = new QVBoxLayout(anon, 1, 1, "anonLayout");
QTextEdit *editor = new QTextEdit(anon, "pvEdit");
editor->setReadOnly(TRUE);
editor->setUndoRedoEnabled(FALSE );
anonLayout->addWidget(editor);
pvTab->addTab(anon, "Tab");
pvTab->showPage(anon);
tabData.push_back(TabData(anon));
return editor;
}
void Preview::setCurTabProps(const string &fn, const Rcl::Doc &doc,
int docnum)
{
QString title = QString::fromUtf8(doc.title.c_str(),
doc.title.length());
if (title.length() > 20) {
title = title.left(10) + "..." + title.right(10);
}
QWidget *w = pvTab->currentPage();
pvTab->changeTab(w, title);
char datebuf[100];
datebuf[0] = 0;
if (!doc.fmtime.empty() || !doc.dmtime.empty()) {
time_t mtime = doc.dmtime.empty() ?
atol(doc.fmtime.c_str()) : atol(doc.dmtime.c_str());
struct tm *tm = localtime(&mtime);
strftime(datebuf, 99, "%Y-%m-%d %H:%M:%S", tm);
}
LOGDEB(("Doc.url: [%s]\n", doc.url.c_str()));
string url;
printableUrl(doc.url, url);
string tiptxt = url + string("\n");
tiptxt += doc.mimetype + " " + string(datebuf) + "\n";
if (!doc.title.empty())
tiptxt += doc.title + "\n";
pvTab->setTabToolTip(w,QString::fromUtf8(tiptxt.c_str(), tiptxt.length()));
for (list<TabData>::iterator it = tabData.begin();
it != tabData.end(); it++) {
if (it->w == w) {
it->fn = fn;
it->ipath = doc.ipath;
it->docnum = docnum;
break;
}
}
}
TabData *Preview::tabDataForCurrent()
{
QWidget *w = pvTab->currentPage();
if (w == 0)
return 0;
for (list<TabData>::iterator it = tabData.begin();
it != tabData.end(); it++) {
if (it->w == w) {
return &(*it);
}
}
return 0;
}
bool Preview::makeDocCurrent(const string &fn, const Rcl::Doc &doc)
{
LOGDEB(("Preview::makeFileCurrent: %s\n", fn.c_str()));
for (list<TabData>::iterator it = tabData.begin();
it != tabData.end(); it++) {
LOGDEB2(("Preview::makeFileCurrent: compare to w %p, file %s\n",
it->w, it->fn.c_str()));
if (!it->fn.compare(fn) && !it->ipath.compare(doc.ipath)) {
pvTab->showPage(it->w);
return true;
}
}
return false;
}
/*
Code for loading a file into an editor window. The operations that
we call have no provision to indicate progression, and it would be
complicated or impossible to modify them to do so (Ie: for external
format converters).
We implement a complicated and ugly mechanism based on threads to indicate
to the user that the app is doing things: lengthy operations are done in
threads and we update a progress indicator while they proceed (but we have
no estimate of their total duration).
An auxiliary thread object is used for short waits. Another option would be
to use signals/slots and return to the event-loop instead, but this would
be even more complicated, and we probably don't want the user to click on
things during this time anyway.
It might be possible, but complicated (need modifications in
handler) to implement a kind of bucket brigade, to have the
beginning of the text displayed faster
*/
/* A thread to to the file reading / format conversion */
class LoadThread : public QThread {
int *statusp;
Rcl::Doc *out;
string filename;
string ipath;
string *mtype;
string tmpdir;
int loglevel;
public:
string missing;
LoadThread(int *stp, Rcl::Doc *odoc, string fn, string ip, string *mt)
: statusp(stp), out(odoc), filename(fn), ipath(ip), mtype(mt)
{
loglevel = DebugLog::getdbl()->getlevel();
}
~LoadThread() {
if (tmpdir.length()) {
wipedir(tmpdir);
rmdir(tmpdir.c_str());
}
}
virtual void run() {
DebugLog::getdbl()->setloglevel(loglevel);
string reason;
if (!maketmpdir(tmpdir, reason)) {
QMessageBox::critical(0, "Recoll",
Preview::tr("Cannot create temporary directory"));
LOGERR(("Preview: %s\n", reason.c_str()));
*statusp = -1;
return;
}
struct stat st;
if (stat(filename.c_str(), &st) < 0) {
LOGERR(("Preview: can't stat [%s]\n", filename.c_str()));
QMessageBox::critical(0, "Recoll",
Preview::tr("File does not exist"));
*statusp = -1;
return;
}
FileInterner interner(filename, &st, rclconfig, tmpdir, mtype);
try {
FileInterner::Status ret = interner.internfile(*out, ipath);
if (ret == FileInterner::FIDone || ret == FileInterner::FIAgain) {
// FIAgain is actually not nice here. It means that the record
// for the *file* of a multidoc was selected. Actually this
// shouldn't have had a preview link at all, but we don't know
// how to handle it now. Better to show the first doc than
// a mysterious error. Happens when the file name matches a
// a search term of course.
*statusp = 0;
} else {
out->mimetype = interner.getMimetype();
interner.getMissingExternal(missing);
*statusp = -1;
}
} catch (CancelExcept) {
*statusp = -1;
}
}
};
/* A thread to convert to rich text (mark search terms) */
class ToRichThread : public QThread {
string &in;
const HiliteData &hdata;
QString &out;
int loglevel;
public:
ToRichThread(string &i, const HiliteData& hd, QString &o)
: in(i), hdata(hd), out(o)
{
loglevel = DebugLog::getdbl()->getlevel();
}
virtual void run()
{
DebugLog::getdbl()->setloglevel(loglevel);
string rich;
try {
plaintorich(in, rich, hdata, false, true);
} catch (CancelExcept) {
}
out = QString::fromUtf8(rich.c_str(), rich.length());
}
};
/* A thread to implement short waiting. There must be a better way ! */
class WaiterThread : public QThread {
int ms;
public:
WaiterThread(int millis) : ms(millis) {}
virtual void run() {
msleep(ms);
}
};
#define CHUNKL 50*1000
#ifndef MIN
#define MIN(A,B) ((A)<(B)?(A):(B))
#endif
class LoadGuard {
bool *m_bp;
public:
LoadGuard(bool *bp) {m_bp = bp ; *m_bp = true;}
~LoadGuard() {*m_bp = false;}
};
bool Preview::loadFileInCurrentTab(string fn, size_t sz, const Rcl::Doc &idoc,
int docnum)
{
if (m_loading) {
LOGERR(("ALready loading\n"));
return false;
}
LoadGuard guard(&m_loading);
Rcl::Doc doc = idoc;
bool cancel = false;
if (doc.title.empty())
doc.title = path_getsimple(doc.url);
setCurTabProps(fn, doc, docnum);
char csz[20];
sprintf(csz, "%lu", (unsigned long)sz);
QString msg = QString("Loading: %1 (size %2 bytes)")
.arg(QString::fromLocal8Bit(fn.c_str()))
.arg(csz);
// Create progress dialog and aux objects
const int nsteps = 20;
QProgressDialog progress(msg, tr("Cancel"), nsteps, this, "Loading", FALSE);
progress.setMinimumDuration(2000);
WaiterThread waiter(100);
// Load and convert file
Rcl::Doc fdoc;
// Need to setup config to retrieve possibly local parameters
rclconfig->setKeyDir(path_getfather(fn));
int status = 1;
LoadThread lthr(&status, &fdoc, fn, doc.ipath, &doc.mimetype);
lthr.start();
int prog;
for (prog = 1;;prog++) {
waiter.start();
waiter.wait();
#if (QT_VERSION < 0x040000)
if (lthr.finished())
break;
#else
if (lthr.isFinished())
break;
#endif
progress.setProgress(prog , prog <= nsteps-1 ? nsteps : prog+1);
qApp->processEvents();
if (progress.wasCanceled()) {
CancelCheck::instance().setCancel();
cancel = true;
}
if (prog >= 5)
sleep(1);
}
if (cancel)
return false;
if (status != 0) {
QString explain;
if (!lthr.missing.empty()) {
explain = QString::fromAscii("<br>") +
tr("Missing helper program: ") +
QString::fromLocal8Bit(lthr.missing.c_str());
}
QMessageBox::warning(0, "Recoll",
tr("Can't turn doc into internal "
"representation for ") +
fdoc.mimetype.c_str() + explain);
return false;
}
// Reset config just in case.
rclconfig->setKeyDir("");
// Create preview text: highlight search terms (if not too big):
QString richTxt;
bool highlightTerms = fdoc.text.length() < 1000 *1024;
if (highlightTerms) {
progress.setLabelText(tr("Creating preview text"));
ToRichThread rthr(fdoc.text, m_hData, richTxt);
rthr.start();
for (;;prog++) {
waiter.start(); waiter.wait();
#if (QT_VERSION < 0x040000)
if (rthr.finished())
break;
#else
if (rthr.isFinished())
break;
#endif
progress.setProgress(prog , prog <= nsteps-1 ? nsteps : prog+1);
qApp->processEvents();
if (progress.wasCanceled()) {
CancelCheck::instance().setCancel();
cancel = true;
}
if (prog >= 5)
sleep(1);
}
if (cancel) {
if (richTxt.length() == 0) {
// We cant call closeCurrentTab here as it might delete
// the object which would be a nasty surprise to our
// caller.
return false;
} else {
richTxt += "<b>Cancelled !</b>";
}
}
} else {
richTxt = fdoc.text.c_str();
}
// Load into editor
// Do it in several chunks
QTextEdit *editor = getCurrentEditor();
editor->setText("");
if (highlightTerms) {
QStyleSheetItem *item =
new QStyleSheetItem(editor->styleSheet(), "termtag" );
item->setColor("blue");
item->setFontWeight(QFont::Bold);
}
prog = 2 * nsteps / 3;
progress.setLabelText(tr("Loading preview text into editor"));
qApp->processEvents();
int l = 0;
for (int pos = 0; pos < (int)richTxt.length(); pos += l, prog++) {
progress.setProgress(prog , prog <= nsteps-1 ? nsteps : prog+1);
qApp->processEvents();
l = MIN(CHUNKL, richTxt.length() - pos);
// Avoid breaking inside a tag. Our tags are short (ie: <br>)
if (pos + l != (int)richTxt.length()) {
for (int i = -15; i < 0; i++) {
if (richTxt[pos+l+i] == '<') {
l = l+i;
break;
}
}
}
editor->append(richTxt.mid(pos, l));
// Stay at top
if (pos < 5) {
editor->setCursorPosition(0,0);
editor->ensureCursorVisible();
}
if (progress.wasCanceled()) {
cancel = true;
editor->append("<b>Cancelled !</b>");
LOGDEB(("Cancelled\n"));
break;
}
}
if (searchTextLine->text().length() != 0) {
canBeep = true;
doSearch(searchTextLine->text(), true, false);
} else {
QString aname = QString::fromUtf8(firstTermAnchorName);
LOGDEB2(("Calling scrolltoanchor [%s]\n", (const char *)aname.utf8()));
editor->scrollToAnchor(aname);
#ifdef QT_SCROLL_TO_ANCHOR_BUG
bool wasC = matchCheck->isChecked();
matchCheck->setChecked(false);
bool ocanbeep = canBeep;
canBeep = false;
doSearch(QString::fromUtf8(firstTermBeacon), 0, false, false);
canBeep = ocanbeep;
editor->del();
matchCheck->setChecked(wasC);
#endif
}
emit(previewExposed(m_searchId, docnum));
return true;
}
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