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::instance()->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 (fragment.isEmpty()) {
 205             goToBookmark(Book::Bookmark(part, 0));
 206         } else {
 207             if (part != contentIndex) {
 208                 qDebug() << "Loading new part" << part;
 209                 restoreFragmentAfterLoad = true;
 210                 fragmentAfterLoad = fragment;
 211                 loadContent(part);
 212             } else {
 213                 goToFragment(fragment);
 214                 showProgress();
 215             }
 216         }
 217     }
 218 }
 219
 220 void BookView::goToFragment(const QString &fragment)
 221 {
 222     TRACE;
 223     if (!fragment.isEmpty()) {
 224         QVariant ret = page()->mainFrame()->evaluateJavaScript(
 225                 QString("window.location='") + fragment + "'");
 226         qDebug() << ret;
 227         // FIXME: setLastBookmark();
 228     }
 229 }
 230
 231 void BookView::onLoadFinished(bool ok)
 232 {
 233     TRACE;
 234     if (!ok) {
 235         qDebug() << "Not OK";
 236         return;
 237     }
 238     loaded = true;
 239     onSettingsChanged("scheme");
 240     onSettingsChanged("zoom");
 241     onSettingsChanged("font");
 242
 243     QTimer::singleShot(210, this, SLOT(restoreAfterLoad()));
 244 }
 245
 246 void BookView::restoreAfterLoad()
 247 {
 248     TRACE;
 249     if (restoreFragmentAfterLoad) {
 250         qDebug() << "Restorint to fragment" << fragmentAfterLoad;
 251         goToFragment(fragmentAfterLoad);
 252         restoreFragmentAfterLoad = false;
 253     } else if (restorePositionAfterLoad) {
 254         qDebug() << "Restoring to position" << positionAfterLoad;
 255         goToPosition(positionAfterLoad);
 256         restorePositionAfterLoad = false;
 257     }
 258
 259     emit partLoadEnd(contentIndex);
 260     showProgress();
 261 }
 262
 263 void BookView::onSettingsChanged(const QString &key)
 264 {
 265     TRACE;
 266     qDebug() << key << Settings::instance()->value(key);
 267
 268     if (key == "zoom") {
 269         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 270     }
 271     else if (key == "font") {
 272         QString face = Settings::instance()->value(key).toString();
 273         settings()->setFontFamily(QWebSettings::StandardFont, face);
 274     }
 275     else if (key == "scheme") {
 276         QWebFrame *frame = page()->mainFrame();
 277         QString scheme = Settings::instance()->value("scheme").toString();
 278         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 279             (scheme != "default")) {
 280             scheme = "default";
 281         }
 282         QFile script(":/styles/" + scheme + ".js");
 283         script.open(QFile::ReadOnly);
 284         QString scriptText = script.readAll();
 285         script.close();
 286         QVariant ret = frame->evaluateJavaScript(scriptText);
 287     }
 288     else if (key == "usevolumekeys") {
 289         grabVolumeKeys(Settings::instance()->value(key).toBool());
 290     }
 291 }
 292
 293 void BookView::paintEvent(QPaintEvent *e)
 294 {
 295     QWebView::paintEvent(e);
 296     if (!mBook || !loaded) {
 297         return;
 298     }
 299
 300     // Paint bookmarks
 301     QWebFrame *frame = page()->mainFrame();
 302     int contentsHeight = frame->contentsSize().height();
 303     QPoint scrollPos = frame->scrollPosition();
 304     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 305     QPainter painter(this);
 306     foreach (Book::Bookmark b, mBook->bookmarks()) {
 307         if (b.part != contentIndex) {
 308             continue;
 309         }
 310         int height = contentsHeight;
 311         int bookmarkPos = (int)((qreal)height * (qreal)b.pos);
 312         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 313     }
 314 }
 315
 316 void BookView::mousePressEvent(QMouseEvent *e)
 317 {
 318     QWebView::mousePressEvent(e);
 319 #if defined(Q_WS_MAEMO_5)
 320     // Start monitoring kinetic scroll
 321     if (scrollerMonitor) {
 322         killTimer(scrollerMonitor);
 323         scrollerMonitor = 0;
 324     }
 325     if (scroller) {
 326         scrollerMonitor = startTimer(500);
 327     }
 328 #else
 329     // Handle mouse presses on the scroll bar
 330     QWebFrame *frame = page()->mainFrame();
 331     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 332         e->accept();
 333         return;
 334     }
 335 #endif // Q_WS_MAEMO_5
 336     e->ignore();
 337 }
 338
 339 void BookView::wheelEvent(QWheelEvent *e)
 340 {
 341     QWebView::wheelEvent(e);
 342     showProgress();
 343 }
 344
 345 void BookView::addBookmark(const QString &note)
 346 {
 347     TRACE;
 348     if (!mBook) {
 349         return;
 350     }
 351     int y = page()->mainFrame()->scrollPosition().y();
 352     int height = page()->mainFrame()->contentsSize().height();
 353     qDebug() << ((qreal)y / (qreal)height);
 354     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height, note);
 355     update();
 356 }
 357
 358 QString BookView::tmpPath()
 359 {
 360     return QDir::tempPath() + "/dorian";
 361 }
 362
 363 bool BookView::eventFilter(QObject *o, QEvent *e)
 364 {
 365 #if 0
 366     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 367         if (e->type() == QEvent::Resize) {
 368             qDebug() << "BookView::eventFilter QEvent::Resize to"
 369                     << page()->mainFrame()->contentsSize().height();
 370         } else if (e->type() == QEvent::Timer) {
 371             qDebug() << "BookView::eventFilter" << "QEvent::Timer"
 372                     << ((QTimerEvent *)e)->timerId();
 373         } else {
 374             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 375         }
 376     }
 377 #endif
 378
 379     // Work around Qt bug that sometimes selects web view contents during swipe
 380     switch (e->type()) {
 381     case QEvent::MouseButtonPress:
 382         emit suppressedMouseButtonPress();
 383         mousePressed = true;
 384         break;
 385     case QEvent::MouseButtonRelease:
 386         showProgress();
 387         mousePressed = false;
 388         break;
 389     case QEvent::MouseMove:
 390         if (mousePressed) {
 391             return true;
 392         }
 393         break;
 394     case QEvent::MouseButtonDblClick:
 395         return true;
 396     default:
 397         break;
 398     }
 399
 400     return QObject::eventFilter(o, e);
 401 }
 402
 403 void BookView::addJavaScriptObjects()
 404 {
 405     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 406 }
 407
 408 #ifdef Q_WS_MAEMO_5
 409
 410 void BookView::leaveEvent(QEvent *e)
 411 {
 412     TRACE;
 413     // Save current position, to be restored later
 414     setLastBookmark();
 415     QWebView::leaveEvent(e);
 416 }
 417
 418 void BookView::resizeEvent(QEvent *e)
 419 {
 420     TRACE;
 421     // Restore position saved at Leave event. This seems to be required,
 422     // after temporarily switching from portrait to landscape and back
 423     restoreLastBookmark();
 424     QWebView::enterEvent(e);
 425 }
 426
 427 #endif // Q_WS_MAEMO_5
 428
 429 void BookView::goToPosition(qreal position)
 430 {
 431     int contentsHeight = page()->mainFrame()->contentsSize().height();
 432     int scrollPos = (int)((qreal)contentsHeight * position);
 433     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 434     // FIXME: update();
 435     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 436             << (position * 100) << "%, height" << contentsHeight << ")";
 437 }
 438
 439 void BookView::showProgress()
 440 {
 441     if (mBook) {
 442         int contentsHeight = page()->mainFrame()->contentsSize().height();
 443         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 444                     (qreal)contentsHeight;
 445         emit progress(mBook->getProgress(contentIndex, pos));
 446     }
 447 }
 448
 449 void BookView::timerEvent(QTimerEvent *e)
 450 {
 451 #if defined(Q_WS_MAEMO_5)
 452     if (e->timerId() == scrollerMonitor) {
 453         if (scroller &&
 454             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 455              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 456             showProgress();
 457         } else {
 458             killTimer(scrollerMonitor);
 459             scrollerMonitor = -1;
 460         }
 461     }
 462 #endif
 463     QWebView::timerEvent(e);
 464 }
 465
 466 void BookView::goPreviousPage()
 467 {
 468     QWebFrame *frame = page()->mainFrame();
 469     int pos = frame->scrollPosition().y();
 470     frame->scroll(0, -height());
 471     if (pos == frame->scrollPosition().y()) {
 472         if (contentIndex > 0) {
 473             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 474             mBook->setLastBookmark(contentIndex - 1, 1.0);
 475             goToBookmark(bookmark);
 476         }
 477     } else {
 478         showProgress();
 479     }
 480 }
 481
 482 void BookView::goNextPage()
 483 {
 484     TRACE;
 485     QWebFrame *frame = page()->mainFrame();
 486     int pos = frame->scrollPosition().y();
 487     frame->scroll(0, height());
 488     if (pos == frame->scrollPosition().y()) {
 489         goNext();
 490     } else {
 491         setLastBookmark();
 492         showProgress();
 493     }
 494 }
 495
 496 void BookView::grabVolumeKeys(bool grab)
 497 {
 498     TRACE;
 499     grabbingVolumeKeys = grab;
 500 }
 501
 502 #ifdef Q_OS_SYMBIAN
 503
 504 void BookView::onMediaKeysPressed(MediaKeysObserver::MediaKeys key)
 505 {
 506     TRACE;
 507     qDebug() << "Key" << (int)key;
 508     if (grabbingVolumeKeys) {
 509         if (key == MediaKeysObserver::EVolIncKey) {
 510             qDebug() << "Volume up";
 511             goPreviousPage();
 512         } else if (key == MediaKeysObserver::EVolDecKey){
 513             qDebug() << "Volume down";
 514             goNextPage();
 515         }
 516     }
 517 }
 518
 519 #endif // Q_OS_SYMBIAN