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     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     if (restoreFragmentAfterLoad) {
 245         qDebug() << "Restorint to fragment" << fragmentAfterLoad;
 246         goToFragment(fragmentAfterLoad);
 247         restoreFragmentAfterLoad = false;
 248     } else if (restorePositionAfterLoad) {
 249         qDebug() << "Restoring to position" << positionAfterLoad;
 250         goToPosition(positionAfterLoad);
 251         restorePositionAfterLoad = false;
 252     }
 253
 254     emit partLoadEnd(contentIndex);
 255     showProgress();
 256 }
 257
 258 void BookView::onSettingsChanged(const QString &key)
 259 {
 260     TRACE;
 261     qDebug() << key << Settings::instance()->value(key);
 262
 263     if (key == "zoom") {
 264         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 265     }
 266     else if (key == "font") {
 267         QString face = Settings::instance()->value(key).toString();
 268         settings()->setFontFamily(QWebSettings::StandardFont, face);
 269     }
 270     else if (key == "scheme") {
 271         QWebFrame *frame = page()->mainFrame();
 272         QString scheme = Settings::instance()->value("scheme").toString();
 273         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 274             (scheme != "default")) {
 275             scheme = "default";
 276         }
 277         QFile script(":/styles/" + scheme + ".js");
 278         script.open(QFile::ReadOnly);
 279         QString scriptText = script.readAll();
 280         script.close();
 281         QVariant ret = frame->evaluateJavaScript(scriptText);
 282     }
 283     else if (key == "usevolumekeys") {
 284         grabVolumeKeys(Settings::instance()->value(key).toBool());
 285     }
 286 }
 287
 288 void BookView::paintEvent(QPaintEvent *e)
 289 {
 290     QWebView::paintEvent(e);
 291     if (!mBook || !loaded) {
 292         return;
 293     }
 294
 295     // Paint bookmarks
 296     QWebFrame *frame = page()->mainFrame();
 297     int contentsHeight = frame->contentsSize().height();
 298     QPoint scrollPos = frame->scrollPosition();
 299     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 300     QPainter painter(this);
 301     foreach (Book::Bookmark b, mBook->bookmarks()) {
 302         if (b.part != contentIndex) {
 303             continue;
 304         }
 305         int height = contentsHeight;
 306         int bookmarkPos = (int)((qreal)height * (qreal)b.pos);
 307         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 308     }
 309 }
 310
 311 void BookView::mousePressEvent(QMouseEvent *e)
 312 {
 313     QWebView::mousePressEvent(e);
 314 #if defined(Q_WS_MAEMO_5)
 315     // Start monitoring kinetic scroll
 316     if (scrollerMonitor) {
 317         killTimer(scrollerMonitor);
 318         scrollerMonitor = 0;
 319     }
 320     if (scroller) {
 321         scrollerMonitor = startTimer(500);
 322     }
 323 #else
 324     // Handle mouse presses on the scroll bar
 325     QWebFrame *frame = page()->mainFrame();
 326     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 327         e->accept();
 328         return;
 329     }
 330 #endif // Q_WS_MAEMO_5
 331     e->ignore();
 332 }
 333
 334 void BookView::wheelEvent(QWheelEvent *e)
 335 {
 336     QWebView::wheelEvent(e);
 337     showProgress();
 338 }
 339
 340 void BookView::addBookmark(const QString &note)
 341 {
 342     TRACE;
 343     if (!mBook) {
 344         return;
 345     }
 346     int y = page()->mainFrame()->scrollPosition().y();
 347     int height = page()->mainFrame()->contentsSize().height();
 348     qDebug() << ((qreal)y / (qreal)height);
 349     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height, note);
 350     update();
 351 }
 352
 353 QString BookView::tmpPath()
 354 {
 355     return QDir::tempPath() + "/dorian";
 356 }
 357
 358 bool BookView::eventFilter(QObject *o, QEvent *e)
 359 {
 360 #if 0
 361     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 362         if (e->type() == QEvent::Resize) {
 363             qDebug() << "BookView::eventFilter QEvent::Resize to"
 364                     << page()->mainFrame()->contentsSize().height();
 365         } else if (e->type() == QEvent::Timer) {
 366             qDebug() << "BookView::eventFilter" << "QEvent::Timer"
 367                     << ((QTimerEvent *)e)->timerId();
 368         } else {
 369             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 370         }
 371     }
 372 #endif
 373
 374     // Work around Qt bug that sometimes selects web view contents during swipe
 375     switch (e->type()) {
 376     case QEvent::MouseButtonPress:
 377         emit suppressedMouseButtonPress();
 378         mousePressed = true;
 379         break;
 380     case QEvent::MouseButtonRelease:
 381         showProgress();
 382         mousePressed = false;
 383         break;
 384     case QEvent::MouseMove:
 385         if (mousePressed) {
 386             return true;
 387         }
 388         break;
 389     case QEvent::MouseButtonDblClick:
 390         return true;
 391     default:
 392         break;
 393     }
 394
 395     return QObject::eventFilter(o, e);
 396 }
 397
 398 void BookView::addJavaScriptObjects()
 399 {
 400     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 401 }
 402
 403 #ifdef Q_WS_MAEMO_5
 404
 405 void BookView::leaveEvent(QEvent *e)
 406 {
 407     TRACE;
 408     // Save current position, to be restored later
 409     setLastBookmark();
 410     QWebView::leaveEvent(e);
 411 }
 412
 413 void BookView::enterEvent(QEvent *e)
 414 {
 415     TRACE;
 416     // Restore position saved at Leave event. This seems to be required,
 417     // after temporarily switching from portrait to landscape and back
 418     restoreLastBookmark();
 419     QWebView::enterEvent(e);
 420 }
 421
 422 #endif // Q_WS_MAEMO_5
 423
 424 void BookView::goToPosition(qreal position)
 425 {
 426     int contentsHeight = page()->mainFrame()->contentsSize().height();
 427     int scrollPos = (int)((qreal)contentsHeight * position);
 428     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 429     // FIXME: update();
 430     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 431             << (position * 100) << "%, height" << contentsHeight << ")";
 432 }
 433
 434 void BookView::showProgress()
 435 {
 436     if (mBook) {
 437         int contentsHeight = page()->mainFrame()->contentsSize().height();
 438         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 439                     (qreal)contentsHeight;
 440         emit progress(mBook->getProgress(contentIndex, pos));
 441     }
 442 }
 443
 444 void BookView::timerEvent(QTimerEvent *e)
 445 {
 446 #if defined(Q_WS_MAEMO_5)
 447     if (e->timerId() == scrollerMonitor) {
 448         if (scroller &&
 449             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 450              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 451             showProgress();
 452         } else {
 453             killTimer(scrollerMonitor);
 454             scrollerMonitor = -1;
 455         }
 456     }
 457 #endif
 458     QWebView::timerEvent(e);
 459 }
 460
 461 void BookView::goPreviousPage()
 462 {
 463     QWebFrame *frame = page()->mainFrame();
 464     int pos = frame->scrollPosition().y();
 465     frame->scroll(0, -height());
 466     if (pos == frame->scrollPosition().y()) {
 467         if (contentIndex > 0) {
 468             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 469             mBook->setLastBookmark(contentIndex - 1, 1.0);
 470             goToBookmark(bookmark);
 471         }
 472     } else {
 473         showProgress();
 474     }
 475 }
 476
 477 void BookView::goNextPage()
 478 {
 479     TRACE;
 480     QWebFrame *frame = page()->mainFrame();
 481     int pos = frame->scrollPosition().y();
 482     frame->scroll(0, height());
 483     if (pos == frame->scrollPosition().y()) {
 484         goNext();
 485     } else {
 486         setLastBookmark();
 487         showProgress();
 488     }
 489 }
 490
 491 void BookView::grabVolumeKeys(bool grab)
 492 {
 493     TRACE;
 494     grabbingVolumeKeys = grab;
 495 }
 496
 497 #ifdef Q_OS_SYMBIAN
 498
 499 void BookView::onMediaKeysPressed(MediaKeysObserver::MediaKeys key)
 500 {
 501     TRACE;
 502     qDebug() << "Key" << (int)key;
 503     if (grabbingVolumeKeys) {
 504         if (key == MediaKeysObserver::EVolIncKey) {
 505             qDebug() << "Volume up";
 506             goPreviousPage();
 507         } else if (key == MediaKeysObserver::EVolDecKey){
 508             qDebug() << "Volume down";
 509             goNextPage();
 510         }
 511     }
 512 }
 513
 514 #endif // Q_OS_SYMBIAN