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