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

   1 #include <QDebug>
   2 #include <QWebFrame>
   3 #include <QMouseEvent>
   4 #include <QFile>
   5 #include <QDir>
   6 #include <QTimer>
   7
   8 #ifdef Q_WS_MAEMO_5
   9 #   include <QAbstractKineticScroller>
  10 #endif
  11
  12 #include "book.h"
  13 #include "bookview.h"
  14 #include "library.h"
  15 #include "settings.h"
  16 #include "trace.h"
  17 #include "progress.h"
  18
  19 #ifdef Q_WS_MAC
  20 #   define ICON_PREFIX ":/icons/mac/"
  21 #else
  22 #   define ICON_PREFIX ":/icons/"
  23 #endif
  24
  25 BookView::BookView(QWidget *parent):
  26     QWebView(parent), contentIndex(-1), mBook(0),
  27     restorePositionAfterLoad(false), positionAfterLoad(0), loaded(false),
  28     contentsHeight(0)
  29 {
  30     Trace t("BookView::BookView");
  31     settings()->setAttribute(QWebSettings::AutoLoadImages, true);
  32     settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
  33     settings()->setAttribute(QWebSettings::JavaEnabled, false);
  34     settings()->setAttribute(QWebSettings::PluginsEnabled, false);
  35     settings()->setAttribute(QWebSettings::PrivateBrowsingEnabled, true);
  36     settings()->setAttribute(QWebSettings::JavascriptCanOpenWindows, false);
  37     settings()->setAttribute(QWebSettings::JavascriptCanAccessClipboard, false);
  38     settings()->setAttribute(QWebSettings::OfflineStorageDatabaseEnabled, false);
  39     settings()->setAttribute(QWebSettings::OfflineWebApplicationCacheEnabled,
  40                              false);
  41     settings()->setAttribute(QWebSettings::LocalStorageEnabled, false);
  42     settings()->setAttribute(QWebSettings::ZoomTextOnly, true);
  43     settings()->setAttribute(QWebSettings::LocalContentCanAccessRemoteUrls,
  44                              false);
  45     settings()->setDefaultTextEncoding("utf-8");
  46     page()->setContentEditable(false);
  47
  48 #if defined(Q_WS_MAEMO_5)
  49     // Suppress unwanted text selections on Maemo
  50     installEventFilter(this);
  51 #endif
  52     QWebFrame *frame = page()->mainFrame();
  53 #if defined(Q_WS_MAEMO_5)
  54     frame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
  55 #endif
  56     frame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
  57
  58     bookmarkImage = QImage(":/icons/bookmark.png");
  59
  60     connect(this, SIGNAL(loadFinished(bool)), this, SLOT(onLoadFinished(bool)));
  61     connect(frame, SIGNAL(javaScriptWindowObjectCleared()),
  62             this, SLOT(addJavaScriptObjects()));
  63     connect(frame, SIGNAL(contentsSizeChanged(const QSize &)),
  64             this, SLOT(onContentsSizeChanged(const QSize &)));
  65     connect(Settings::instance(), SIGNAL(valueChanged(const QString &)),
  66             this, SLOT(onSettingsChanged(const QString &)));
  67     Settings *s = Settings::instance();
  68     s->setValue("zoom", s->value("zoom", 160));
  69     s->setValue("font", s->value("font",
  70 #if defined(Q_WS_MAEMO_5) || defined(Q_WS_X11)
  71                                  "Serif"
  72 #elif defined(Q_WS_MAC)
  73                                  "Hoefler Text"
  74 #else
  75                                  "Times New Roman"
  76 #endif
  77                                  ));
  78     s->setValue("scheme", s->value("scheme", "default"));
  79     setBook(0);
  80
  81 #ifdef Q_WS_MAEMO_5
  82     scrollerMonitor = 0;
  83     scroller = property("kineticScroller").value<QAbstractKineticScroller *>();
  84 #endif
  85 }
  86
  87 BookView::~BookView()
  88 {
  89     Trace t("BookView::~BookView");
  90 }
  91
  92 void BookView::loadContent(int index)
  93 {
  94     Trace t("BookView::loadContent");
  95     if (!mBook) {
  96         return;
  97     }
  98     if ((index < 0) || (index >= mBook->parts.size())) {
  99         return;
 100     }
 101
 102     QString contentFile(mBook->content[mBook->parts[index]].href);
 103     if (mBook->parts[index] == "error") {
 104         setHtml(contentFile);
 105     }
 106     else {
 107         loaded = false;
 108         emit partLoadStart(index);
 109         QUrl u = QUrl::fromLocalFile(QDir(mBook->rootPath()).
 110                                      absoluteFilePath(contentFile));
 111         qDebug() << "Loading" << u;
 112         load(u);
 113     }
 114     contentIndex = index;
 115 }
 116
 117 void BookView::setBook(Book *book)
 118 {
 119     Trace t("BookView::setBook");
 120
 121     // Save position in current book
 122     setLastBookmark();
 123
 124     // Open new book, restore last position
 125     if (book != mBook) {
 126         mBook = book;
 127         if (book) {
 128             contentIndex = -1;
 129             if (book->open()) {
 130                 restoreLastBookmark();
 131             } else {
 132                 mBook = 0;
 133                 contentIndex = 0;
 134                 setHtml(tr("Failed to open book"));
 135             }
 136         }
 137         else {
 138             contentIndex = 0;
 139             setHtml(tr("No book"));
 140         }
 141     }
 142 }
 143
 144 Book *BookView::book()
 145 {
 146     return mBook;
 147 }
 148
 149 void BookView::goPrevious()
 150 {
 151     Trace t("BookView::goPrevious");
 152     if (mBook && (contentIndex > 0)) {
 153         mBook->setLastBookmark(contentIndex - 1, 0);
 154         loadContent(contentIndex - 1);
 155     }
 156 }
 157
 158 void BookView::goNext()
 159 {
 160     Trace t("BookView::goNext");
 161     if (mBook && (contentIndex < (mBook->parts.size() - 1))) {
 162         mBook->setLastBookmark(contentIndex + 1, 0);
 163         loadContent(contentIndex + 1);
 164     }
 165 }
 166
 167 void BookView::setLastBookmark()
 168 {
 169     Trace t("BookView::setLastBookmark");
 170     if (mBook) {
 171         int height = contentsHeight;
 172         int pos = page()->mainFrame()->scrollPosition().y();
 173         qDebug() << QString("At %1 (%2%, height %3)").
 174                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height);
 175         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 176     }
 177 }
 178
 179 void BookView::restoreLastBookmark()
 180 {
 181     Trace t("BookView::restoreLastBookmark");
 182     if (mBook) {
 183         goToBookmark(mBook->lastBookmark());
 184     }
 185 }
 186
 187 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 188 {
 189     Trace t("BookView::goToBookmark");
 190     if (mBook) {
 191         if (bookmark.part != contentIndex) {
 192             qDebug () << "Loading new part" << bookmark.part;
 193             mBook->setLastBookmark(bookmark.part, bookmark.pos);
 194             restorePositionAfterLoad = true;
 195             positionAfterLoad = bookmark.pos;
 196             loadContent(bookmark.part);
 197         } else {
 198             goToPosition(bookmark.pos);
 199         }
 200     }
 201 }
 202
 203 void BookView::onLoadFinished(bool ok)
 204 {
 205     Trace t("BookView::onLoadFinished");
 206     if (!ok) {
 207         qDebug() << "Not OK";
 208         return;
 209     }
 210     loaded = true;
 211     onSettingsChanged("scheme");
 212     emit partLoadEnd(contentIndex);
 213     showProgress();
 214 }
 215
 216 void BookView::onSettingsChanged(const QString &key)
 217 {
 218     Trace t("BookView::onSettingsChanged " + key);
 219     if (key == "zoom") {
 220         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 221     }
 222     else if (key == "font") {
 223         QString face = Settings::instance()->value("font").toString();
 224         settings()->setFontFamily(QWebSettings::StandardFont, face);
 225     }
 226     else if (key == "scheme") {
 227         QWebFrame *frame = page()->mainFrame();
 228         QString scheme = Settings::instance()->value("scheme").toString();
 229         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 230             (scheme != "default")) {
 231             scheme = "default";
 232         }
 233         QFile script(":/styles/" + scheme + ".js");
 234         script.open(QFile::ReadOnly);
 235         QString scriptText = script.readAll();
 236         script.close();
 237         QVariant ret = frame->evaluateJavaScript(scriptText);
 238     }
 239 }
 240
 241 void BookView::paintEvent(QPaintEvent *e)
 242 {
 243     QWebView::paintEvent(e);
 244     if (!mBook || !loaded) {
 245         return;
 246     }
 247
 248     // Paint bookmarks
 249     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 250     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 251     QPainter painter(this);
 252     foreach (Book::Bookmark b, mBook->bookmarks()) {
 253         if (b.part != contentIndex) {
 254             continue;
 255         }
 256         int height = contentsHeight;
 257         int bookmarkPos = (int)((qreal)height * (qreal)b.pos);
 258         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 259     }
 260 }
 261
 262 void BookView::mousePressEvent(QMouseEvent *e)
 263 {
 264     QWebView::mousePressEvent(e);
 265 #ifdef Q_WS_MAEMO_5
 266     // Start monitoring kinetic scroll
 267     if (scrollerMonitor) {
 268         killTimer(scrollerMonitor);
 269         scrollerMonitor = 0;
 270     }
 271     if (scroller) {
 272         scrollerMonitor = startTimer(500);
 273     }
 274 #else
 275     // Handle mouse presses on the scroll bar
 276     QWebFrame *frame = page()->mainFrame();
 277     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 278         e->accept();
 279         return;
 280     }
 281 #endif // Q_WS_MAEMO_5
 282     e->ignore();
 283 }
 284
 285 void BookView::wheelEvent(QWheelEvent *e)
 286 {
 287     QWebView::wheelEvent(e);
 288     showProgress();
 289 }
 290
 291 void BookView::addBookmark()
 292 {
 293     Trace t("BookView::addBookmark");
 294     if (!mBook) {
 295         return;
 296     }
 297     int y = page()->mainFrame()->scrollPosition().y();
 298     int height = page()->mainFrame()->contentsSize().height();
 299     qDebug() << ((qreal)y / (qreal)height);
 300     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 301     update();
 302 }
 303
 304 QString BookView::tmpPath()
 305 {
 306     return QDir::tempPath() + "/dorian";
 307 }
 308
 309 bool BookView::eventFilter(QObject *o, QEvent *e)
 310 {
 311     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 312         if (e->type() == QEvent::Resize) {
 313             qDebug() << "BookView::eventFilter QEvent::Resize to"
 314                     << page()->mainFrame()->contentsSize().height();
 315         } else if (e->type() == QEvent::Timer) {
 316             qDebug() << "BookView::eventFilter" << "QEvent::Timer"
 317                     << ((QTimerEvent *)e)->timerId();
 318         } else {
 319             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 320         }
 321     }
 322
 323     // Work around Qt bug that sometimes selects web view contents during swipe
 324     switch (e->type()) {
 325     case QEvent::MouseButtonPress:
 326         emit suppressedMouseButtonPress();
 327         mousePressed = true;
 328         break;
 329     case QEvent::MouseButtonRelease:
 330         showProgress();
 331         mousePressed = false;
 332         break;
 333     case QEvent::MouseMove:
 334         if (mousePressed) {
 335             return true;
 336         }
 337         break;
 338     case QEvent::MouseButtonDblClick:
 339         return true;
 340     default:
 341         break;
 342     }
 343
 344     return QObject::eventFilter(o, e);
 345 }
 346
 347 void BookView::addJavaScriptObjects()
 348 {
 349     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 350 }
 351
 352 void BookView::onContentsSizeChanged(const QSize &size)
 353 {
 354     contentsHeight = size.height();
 355     if (restorePositionAfterLoad) {
 356         qDebug() << "BookView::onContentSizeChanged: Time to restore";
 357         restorePositionAfterLoad = false;
 358         goToPosition(positionAfterLoad);
 359     }
 360 }
 361
 362 void BookView::leaveEvent(QEvent *e)
 363 {
 364     Trace t("BookView::leaveEvent");
 365     // Save current position, to be restored later
 366     setLastBookmark();
 367     QWebView::leaveEvent(e);
 368 }
 369
 370 void BookView::enterEvent(QEvent *e)
 371 {
 372     Trace t("BookView::enterEvent");
 373     // Restore position saved at Leave event. This seems to be required,
 374     // after temporarily switching from portrait to landscape and back
 375     restoreLastBookmark();
 376     QWebView::enterEvent(e);
 377 }
 378
 379 void BookView::goToPosition(qreal position)
 380 {
 381     int scrollPos = (int)((qreal)contentsHeight * position);
 382     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 383     // FIXME: update();
 384     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 385             << (position * 100) << "%, height" << contentsHeight << ")";
 386 }
 387
 388 void BookView::showProgress()
 389 {
 390     if (mBook) {
 391         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 392                     (qreal)contentsHeight;
 393         emit progress(mBook->getProgress(contentIndex, pos));
 394     }
 395 }
 396
 397 void BookView::timerEvent(QTimerEvent *e)
 398 {
 399 #ifdef Q_WS_MAEMO_5
 400     if (e->timerId() == scrollerMonitor) {
 401         if (scroller &&
 402             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 403              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 404             showProgress();
 405         } else {
 406             killTimer(scrollerMonitor);
 407         }
 408     }
 409 #else
 410     Q_UNUSED(e);
 411 #endif // Q_WS_MAEMO_5
 412 }
 413
 414 void BookView::keyPressEvent(QKeyEvent* event)
 415 {
 416     switch (event->key()) {
 417     case Qt::Key_F7:
 418         goNextPage();
 419         event->accept();
 420         break;
 421     case Qt::Key_F8:
 422         goPreviousPage();
 423         event->accept();
 424         break;
 425     default:
 426         ;
 427     }
 428     QWebView::keyPressEvent(event);
 429 }
 430
 431 void BookView::goPreviousPage()
 432 {
 433     QWebFrame *frame = page()->mainFrame();
 434     int pos = frame->scrollPosition().y();
 435     frame->scroll(0, -height());
 436     if (pos == frame->scrollPosition().y()) {
 437         if (contentIndex > 0) {
 438             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 439             mBook->setLastBookmark(contentIndex - 1, 1.0);
 440             goToBookmark(bookmark);
 441         }
 442     } else {
 443         showProgress();
 444     }
 445 }
 446
 447 void BookView::goNextPage()
 448 {
 449     Trace t("BookView::goNextPage");
 450     QWebFrame *frame = page()->mainFrame();
 451     int pos = frame->scrollPosition().y();
 452     frame->scroll(0, height());
 453     if (pos == frame->scrollPosition().y()) {
 454         goNext();
 455     } else {
 456         setLastBookmark();
 457         showProgress();
 458     }
 459 }