vcs.maemo.org Git - dorian/blob - bookview.cpp

   1 #include <QDir>
   2 #include <QtGui>
   3 #include <QWebFrame>
   4
   5 #if defined(Q_OS_SYMBIAN)
   6 #   include "mediakeysobserver.h"
   7 #   include "flickcharm.h"
   8 #endif
   9
  10 #include "book.h"
  11 #include "bookview.h"
  12 #include "library.h"
  13 #include "settings.h"
  14 #include "trace.h"
  15 #include "progress.h"
  16 #include "progressdialog.h"
  17 #include "platform.h"
  18
  19 BookView::BookView(QWidget *parent): QWebView(parent), contentIndex(-1),
  20     mBook(0), restorePositionAfterLoad(false), positionAfterLoad(0),
  21     restoreFragmentAfterLoad(false), loaded(false), grabbingVolumeKeys(false)
  22 {
  23     TRACE;
  24
  25     // Set up web view defaults
  26     settings()->setAttribute(QWebSettings::AutoLoadImages, true);
  27     settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
  28     settings()->setAttribute(QWebSettings::JavaEnabled, false);
  29     settings()->setAttribute(QWebSettings::PluginsEnabled, false);
  30     settings()->setAttribute(QWebSettings::PrivateBrowsingEnabled, true);
  31     settings()->setAttribute(QWebSettings::JavascriptCanOpenWindows, false);
  32     settings()->setAttribute(QWebSettings::JavascriptCanAccessClipboard, false);
  33     settings()->setAttribute(QWebSettings::OfflineStorageDatabaseEnabled,
  34                              false);
  35     settings()->setAttribute(QWebSettings::OfflineWebApplicationCacheEnabled,
  36                              false);
  37     settings()->setAttribute(QWebSettings::LocalStorageEnabled, false);
  38     settings()->setAttribute(QWebSettings::ZoomTextOnly, true);
  39     settings()->setAttribute(QWebSettings::LocalContentCanAccessRemoteUrls,
  40                              false);
  41     settings()->setDefaultTextEncoding("utf-8");
  42     page()->setContentEditable(false);
  43     QWebFrame *frame = page()->mainFrame();
  44 #if defined(Q_WS_MAEMO_5) || defined(Q_OS_SYMBIAN)
  45     frame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
  46 #endif
  47     frame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
  48     connect(this, SIGNAL(loadFinished(bool)), this, SLOT(onLoadFinished(bool)));
  49     connect(frame, SIGNAL(javaScriptWindowObjectCleared()),
  50             this, SLOT(addJavaScriptObjects()));
  51
  52     // Suppress unwanted text selections on Maemo and Symbian
  53 #if defined(Q_WS_MAEMO_5) || defined(Q_OS_SYMBIAN)
  54     installEventFilter(this);
  55 #endif
  56
  57     // Pre-load bookmark icon
  58     bookmarkImage = QImage(":/icons/bookmark.png");
  59
  60     // Handle settings changes, force handling initial settings
  61     Settings *s = Settings::instance();
  62     connect(s, SIGNAL(valueChanged(const QString &)),
  63             this, SLOT(onSettingsChanged(const QString &)));
  64     s->setValue("zoom", s->value("zoom", 160));
  65     s->setValue("font", s->value("font", Platform::defaultFont()));
  66     s->setValue("scheme", s->value("scheme", "default"));
  67     s->setValue("usevolumekeys", s->value("usevolumekeys", false));
  68     setBook(0);
  69
  70     // Enable kinetic scrolling
  71 #if defined(Q_WS_MAEMO_5)
  72     scrollerMonitor = 0;
  73     scroller = property("kineticScroller").value<QAbstractKineticScroller *>();
  74 #elif defined(Q_OS_SYMBIAN)
  75     scrollerMonitor = 0;
  76     charm = new FlickCharm(this);
  77     charm->activateOn(this);
  78 #endif
  79
  80     // Observe media keys on Symbian
  81 #ifdef Q_OS_SYMBIAN
  82     MediaKeysObserver *observer = MediaKeysObserver::instance();
  83     connect(observer, SIGNAL(mediaKeyPressed(MediaKeysObserver::MediaKeys)),
  84             this, SLOT(onMediaKeysPressed(MediaKeysObserver::MediaKeys)));
  85 #endif
  86 }
  87
  88 void BookView::loadContent(int index)
  89 {
  90     TRACE;
  91
  92     if (!mBook) {
  93         return;
  94     }
  95     if ((index < 0) || (index >= mBook->parts.size())) {
  96         return;
  97     }
  98
  99     QString contentFile(mBook->content[mBook->parts[index]].href);
 100     if (mBook->parts[index] == "error") {
 101         setHtml(contentFile);
 102     } else {
 103         loaded = false;
 104         emit partLoadStart(index);
 105         QUrl u = QUrl::fromLocalFile(QDir(mBook->rootPath()).
 106                                      absoluteFilePath(contentFile));
 107         qDebug() << "Loading" << u;
 108         load(u);
 109     }
 110     contentIndex = index;
 111 }
 112
 113 void BookView::setBook(Book *book)
 114 {
 115     TRACE;
 116
 117     // Save position in current book
 118     setLastBookmark();
 119
 120     // Open new book, restore last position
 121     if (book != mBook) {
 122         mBook = book;
 123         if (book) {
 124             contentIndex = -1;
 125             if (book->open()) {
 126                 restoreLastBookmark();
 127             } else {
 128                 mBook = 0;
 129                 contentIndex = 0;
 130                 setHtml(tr("Failed to open book"));
 131             }
 132         }
 133         else {
 134             contentIndex = 0;
 135             setHtml(tr("No book"));
 136         }
 137     }
 138 }
 139
 140 Book *BookView::book()
 141 {
 142     return mBook;
 143 }
 144
 145 void BookView::goPrevious()
 146 {
 147     TRACE;
 148     if (mBook && (contentIndex > 0)) {
 149         mBook->setLastBookmark(contentIndex - 1, 0);
 150         loadContent(contentIndex - 1);
 151     }
 152 }
 153
 154 void BookView::goNext()
 155 {
 156     TRACE;
 157     if (mBook && (contentIndex < (mBook->parts.size() - 1))) {
 158         mBook->setLastBookmark(contentIndex + 1, 0);
 159         loadContent(contentIndex + 1);
 160     }
 161 }
 162
 163 void BookView::setLastBookmark()
 164 {
 165     TRACE;
 166     if (mBook) {
 167         QWebFrame *frame = page()->mainFrame();
 168         int height = frame->contentsSize().height();
 169         int pos = frame->scrollPosition().y();
 170         qDebug() << QString("At %1 (%2%, height %3)").
 171                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height);
 172         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 173     }
 174 }
 175
 176 void BookView::restoreLastBookmark()
 177 {
 178     TRACE;
 179     if (mBook) {
 180         goToBookmark(mBook->lastBookmark());
 181     }
 182 }
 183
 184 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 185 {
 186     TRACE;
 187     if (mBook) {
 188         if (bookmark.part != contentIndex) {
 189             qDebug () << "Loading new part" << bookmark.part;
 190             mBook->setLastBookmark(bookmark.part, bookmark.pos);
 191             restorePositionAfterLoad = true;
 192             positionAfterLoad = bookmark.pos;
 193             loadContent(bookmark.part);
 194         } else {
 195             goToPosition(bookmark.pos);
 196         }
 197     }
 198 }
 199
 200 void BookView::goToPart(int part, const QString &fragment)
 201 {
 202     TRACE;
 203     if (mBook) {
 204         if (part != contentIndex) {
 205             qDebug() << "Loading new part" << part;
 206             restoreFragmentAfterLoad = true;
 207             fragmentAfterLoad = fragment;
 208             loadContent(part);
 209         } else {
 210             goToFragment(fragment);
 211             showProgress();
 212         }
 213     }
 214 }
 215
 216 void BookView::goToFragment(const QString &fragment)
 217 {
 218     TRACE;
 219     if (!fragment.isEmpty()) {
 220         QVariant ret = page()->mainFrame()->evaluateJavaScript(
 221                 QString("window.location='") + fragment + "'");
 222         qDebug() << ret;
 223         setLastBookmark();
 224     }
 225 }
 226
 227 void BookView::onLoadFinished(bool ok)
 228 {
 229     TRACE;
 230     if (!ok) {
 231         qDebug() << "Not OK";
 232         return;
 233     }
 234     loaded = true;
 235     onSettingsChanged("scheme");
 236     onSettingsChanged("zoom");
 237     onSettingsChanged("font");
 238
 239     QTimer::singleShot(210, this, SLOT(restoreAfterLoad()));
 240 }
 241
 242 void BookView::restoreAfterLoad()
 243 {
 244     TRACE;
 245     if (restoreFragmentAfterLoad) {
 246         qDebug() << "Restorint to fragment" << fragmentAfterLoad;
 247         goToFragment(fragmentAfterLoad);
 248         restoreFragmentAfterLoad = false;
 249     } else if (restorePositionAfterLoad) {
 250         qDebug() << "Restoring to position" << positionAfterLoad;
 251         goToPosition(positionAfterLoad);
 252         restorePositionAfterLoad = false;
 253     }
 254
 255     emit partLoadEnd(contentIndex);
 256     showProgress();
 257 }
 258
 259 void BookView::onSettingsChanged(const QString &key)
 260 {
 261     TRACE;
 262     qDebug() << key << Settings::instance()->value(key);
 263
 264     if (key == "zoom") {
 265         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 266     }
 267     else if (key == "font") {
 268         QString face = Settings::instance()->value(key).toString();
 269         settings()->setFontFamily(QWebSettings::StandardFont, face);
 270     }
 271     else if (key == "scheme") {
 272         QWebFrame *frame = page()->mainFrame();
 273         QString scheme = Settings::instance()->value("scheme").toString();
 274         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 275             (scheme != "default")) {
 276             scheme = "default";
 277         }
 278         QFile script(":/styles/" + scheme + ".js");
 279         script.open(QFile::ReadOnly);
 280         QString scriptText = script.readAll();
 281         script.close();
 282         QVariant ret = frame->evaluateJavaScript(scriptText);
 283     }
 284     else if (key == "usevolumekeys") {
 285         grabVolumeKeys(Settings::instance()->value(key).toBool());
 286     }
 287 }
 288
 289 void BookView::paintEvent(QPaintEvent *e)
 290 {
 291     QWebView::paintEvent(e);
 292     if (!mBook || !loaded) {
 293         return;
 294     }
 295
 296     // Paint bookmarks
 297     QWebFrame *frame = page()->mainFrame();
 298     int contentsHeight = frame->contentsSize().height();
 299     QPoint scrollPos = frame->scrollPosition();
 300     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 301     QPainter painter(this);
 302     foreach (Book::Bookmark b, mBook->bookmarks()) {
 303         if (b.part != contentIndex) {
 304             continue;
 305         }
 306         int height = contentsHeight;
 307         int bookmarkPos = (int)((qreal)height * (qreal)b.pos);
 308         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 309     }
 310 }
 311
 312 void BookView::mousePressEvent(QMouseEvent *e)
 313 {
 314     QWebView::mousePressEvent(e);
 315 #if defined(Q_WS_MAEMO_5)
 316     // Start monitoring kinetic scroll
 317     if (scrollerMonitor) {
 318         killTimer(scrollerMonitor);
 319         scrollerMonitor = 0;
 320     }
 321     if (scroller) {
 322         scrollerMonitor = startTimer(500);
 323     }
 324 #else
 325     // Handle mouse presses on the scroll bar
 326     QWebFrame *frame = page()->mainFrame();
 327     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 328         e->accept();
 329         return;
 330     }
 331 #endif // Q_WS_MAEMO_5
 332     e->ignore();
 333 }
 334
 335 void BookView::wheelEvent(QWheelEvent *e)
 336 {
 337     QWebView::wheelEvent(e);
 338     showProgress();
 339 }
 340
 341 void BookView::addBookmark(const QString &note)
 342 {
 343     TRACE;
 344     if (!mBook) {
 345         return;
 346     }
 347     int y = page()->mainFrame()->scrollPosition().y();
 348     int height = page()->mainFrame()->contentsSize().height();
 349     qDebug() << ((qreal)y / (qreal)height);
 350     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height, note);
 351     update();
 352 }
 353
 354 QString BookView::tmpPath()
 355 {
 356     return QDir::tempPath() + "/dorian";
 357 }
 358
 359 bool BookView::eventFilter(QObject *o, QEvent *e)
 360 {
 361 #if 0
 362     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 363         if (e->type() == QEvent::Resize) {
 364             qDebug() << "BookView::eventFilter QEvent::Resize to"
 365                     << page()->mainFrame()->contentsSize().height();
 366         } else if (e->type() == QEvent::Timer) {
 367             qDebug() << "BookView::eventFilter" << "QEvent::Timer"
 368                     << ((QTimerEvent *)e)->timerId();
 369         } else {
 370             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 371         }
 372     }
 373 #endif
 374
 375     // Work around Qt bug that sometimes selects web view contents during swipe
 376     switch (e->type()) {
 377     case QEvent::MouseButtonPress:
 378         emit suppressedMouseButtonPress();
 379         mousePressed = true;
 380         break;
 381     case QEvent::MouseButtonRelease:
 382         showProgress();
 383         mousePressed = false;
 384         break;
 385     case QEvent::MouseMove:
 386         if (mousePressed) {
 387             return true;
 388         }
 389         break;
 390     case QEvent::MouseButtonDblClick:
 391         return true;
 392     default:
 393         break;
 394     }
 395
 396     return QObject::eventFilter(o, e);
 397 }
 398
 399 void BookView::addJavaScriptObjects()
 400 {
 401     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 402 }
 403
 404 #ifdef Q_WS_MAEMO_5
 405
 406 void BookView::leaveEvent(QEvent *e)
 407 {
 408     TRACE;
 409     // Save current position, to be restored later
 410     setLastBookmark();
 411     QWebView::leaveEvent(e);
 412 }
 413
 414 void BookView::enterEvent(QEvent *e)
 415 {
 416     TRACE;
 417     // Restore position saved at Leave event. This seems to be required,
 418     // after temporarily switching from portrait to landscape and back
 419     restoreLastBookmark();
 420     QWebView::enterEvent(e);
 421 }
 422
 423 #endif // Q_WS_MAEMO_5
 424
 425 void BookView::goToPosition(qreal position)
 426 {
 427     int contentsHeight = page()->mainFrame()->contentsSize().height();
 428     int scrollPos = (int)((qreal)contentsHeight * position);
 429     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 430     // FIXME: update();
 431     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 432             << (position * 100) << "%, height" << contentsHeight << ")";
 433 }
 434
 435 void BookView::showProgress()
 436 {
 437     if (mBook) {
 438         int contentsHeight = page()->mainFrame()->contentsSize().height();
 439         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 440                     (qreal)contentsHeight;
 441         emit progress(mBook->getProgress(contentIndex, pos));
 442     }
 443 }
 444
 445 void BookView::timerEvent(QTimerEvent *e)
 446 {
 447 #if defined(Q_WS_MAEMO_5)
 448     if (e->timerId() == scrollerMonitor) {
 449         if (scroller &&
 450             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 451              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 452             showProgress();
 453         } else {
 454             killTimer(scrollerMonitor);
 455             scrollerMonitor = -1;
 456         }
 457     }
 458 #endif
 459     QWebView::timerEvent(e);
 460 }
 461
 462 void BookView::goPreviousPage()
 463 {
 464     QWebFrame *frame = page()->mainFrame();
 465     int pos = frame->scrollPosition().y();
 466     frame->scroll(0, -height());
 467     if (pos == frame->scrollPosition().y()) {
 468         if (contentIndex > 0) {
 469             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 470             mBook->setLastBookmark(contentIndex - 1, 1.0);
 471             goToBookmark(bookmark);
 472         }
 473     } else {
 474         showProgress();
 475     }
 476 }
 477
 478 void BookView::goNextPage()
 479 {
 480     TRACE;
 481     QWebFrame *frame = page()->mainFrame();
 482     int pos = frame->scrollPosition().y();
 483     frame->scroll(0, height());
 484     if (pos == frame->scrollPosition().y()) {
 485         goNext();
 486     } else {
 487         setLastBookmark();
 488         showProgress();
 489     }
 490 }
 491
 492 void BookView::grabVolumeKeys(bool grab)
 493 {
 494     TRACE;
 495     grabbingVolumeKeys = grab;
 496 }
 497
 498 #ifdef Q_OS_SYMBIAN
 499
 500 void BookView::onMediaKeysPressed(MediaKeysObserver::MediaKeys key)
 501 {
 502     TRACE;
 503     qDebug() << "Key" << (int)key;
 504     if (grabbingVolumeKeys) {
 505         if (key == MediaKeysObserver::EVolIncKey) {
 506             qDebug() << "Volume up";
 507             goPreviousPage();
 508         } else if (key == MediaKeysObserver::EVolDecKey){
 509             qDebug() << "Volume down";
 510             goNextPage();
 511         }
 512     }
 513 }
 514
 515 #endif // Q_OS_SYMBIAN