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), scrollerMonitor(-1)
  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     scroller = property("kineticScroller").value<QAbstractKineticScroller *>();
  83 #endif
  84 }
  85
  86 BookView::~BookView()
  87 {
  88     Trace t("BookView::~BookView");
  89 }
  90
  91 void BookView::loadContent(int index)
  92 {
  93     Trace t("BookView::loadContent");
  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     }
 105     else {
 106         loaded = false;
 107         emit partLoadStart(index);
 108         QUrl u = QUrl::fromLocalFile(QDir(mBook->rootPath()).
 109                                      absoluteFilePath(contentFile));
 110         qDebug() << "Loading" << u;
 111         load(u);
 112     }
 113     contentIndex = index;
 114 }
 115
 116 void BookView::setBook(Book *book)
 117 {
 118     Trace t("BookView::setBook");
 119
 120     // Save position in current book
 121     setLastBookmark();
 122
 123     // Open new book, restore last position
 124     if (book != mBook) {
 125         mBook = book;
 126         if (book) {
 127             contentIndex = -1;
 128             if (book->open()) {
 129                 restoreLastBookmark();
 130             } else {
 131                 mBook = 0;
 132                 contentIndex = 0;
 133                 setHtml(tr("Failed to open book"));
 134             }
 135         }
 136         else {
 137             contentIndex = 0;
 138             setHtml(tr("No book"));
 139         }
 140     }
 141 }
 142
 143 Book *BookView::book()
 144 {
 145     return mBook;
 146 }
 147
 148 void BookView::goPrevious()
 149 {
 150     Trace t("BookView::goPrevious");
 151     if (mBook && (contentIndex > 0)) {
 152         mBook->setLastBookmark(contentIndex - 1, 0);
 153         loadContent(contentIndex - 1);
 154     }
 155 }
 156
 157 void BookView::goNext()
 158 {
 159     Trace t("BookView::goNext");
 160     if (mBook && (contentIndex < (mBook->parts.size() - 1))) {
 161         mBook->setLastBookmark(contentIndex + 1, 0);
 162         loadContent(contentIndex + 1);
 163     }
 164 }
 165
 166 void BookView::setLastBookmark()
 167 {
 168     Trace t("BookView::setLastBookmark");
 169     if (mBook) {
 170         int height = contentsHeight;
 171         int pos = page()->mainFrame()->scrollPosition().y();
 172         qDebug() << QString("At %1 (%2%, height %3)").
 173                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height);
 174         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 175     }
 176 }
 177
 178 void BookView::restoreLastBookmark()
 179 {
 180     Trace t("BookView::restoreLastBookmark");
 181     if (mBook) {
 182         goToBookmark(mBook->lastBookmark());
 183     }
 184 }
 185
 186 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 187 {
 188     Trace t("BookView::goToBookmark");
 189     if (mBook) {
 190         if (bookmark.part != contentIndex) {
 191             qDebug () << "Loading new part" << bookmark.part;
 192             mBook->setLastBookmark(bookmark.part, bookmark.pos);
 193             restorePositionAfterLoad = true;
 194             positionAfterLoad = bookmark.pos;
 195             loadContent(bookmark.part);
 196         } else {
 197             goToPosition(bookmark.pos);
 198         }
 199     }
 200 }
 201
 202 void BookView::onLoadFinished(bool ok)
 203 {
 204     Trace t("BookView::onLoadFinished");
 205     if (!ok) {
 206         qDebug() << "Not OK";
 207         return;
 208     }
 209     loaded = true;
 210     onSettingsChanged("scheme");
 211     emit partLoadEnd(contentIndex);
 212     showProgress();
 213 }
 214
 215 void BookView::onSettingsChanged(const QString &key)
 216 {
 217     Trace t("BookView::onSettingsChanged " + key);
 218     if (key == "zoom") {
 219         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 220     }
 221     else if (key == "font") {
 222         QString face = Settings::instance()->value("font").toString();
 223         settings()->setFontFamily(QWebSettings::StandardFont, face);
 224     }
 225     else if (key == "scheme") {
 226         QWebFrame *frame = page()->mainFrame();
 227         QString scheme = Settings::instance()->value("scheme").toString();
 228         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 229             (scheme != "default")) {
 230             scheme = "default";
 231         }
 232         QFile script(":/styles/" + scheme + ".js");
 233         script.open(QFile::ReadOnly);
 234         QString scriptText = script.readAll();
 235         script.close();
 236         QVariant ret = frame->evaluateJavaScript(scriptText);
 237     }
 238 }
 239
 240 void BookView::paintEvent(QPaintEvent *e)
 241 {
 242     QWebView::paintEvent(e);
 243     if (!mBook || !loaded) {
 244         return;
 245     }
 246
 247     // Paint bookmarks
 248     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 249     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 250     QPainter painter(this);
 251     foreach (Book::Bookmark b, mBook->bookmarks()) {
 252         if (b.part != contentIndex) {
 253             continue;
 254         }
 255         int height = contentsHeight;
 256         int bookmarkPos = (int)((qreal)height * (qreal)b.pos);
 257         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 258     }
 259 }
 260
 261 void BookView::mousePressEvent(QMouseEvent *e)
 262 {
 263     QWebView::mousePressEvent(e);
 264 #ifdef Q_WS_MAEMO_5
 265     // Start monitoring kinetic scroll
 266     if (scroller) {
 267         scrollerMonitor = startTimer(250);
 268     }
 269 #else
 270     // Handle mouse presses on the scroll bar
 271     QWebFrame *frame = page()->mainFrame();
 272     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 273         e->accept();
 274         return;
 275     }
 276 #endif // Q_WS_MAEMO_5
 277     e->ignore();
 278 }
 279
 280 void BookView::wheelEvent(QWheelEvent *e)
 281 {
 282     QWebView::wheelEvent(e);
 283     showProgress();
 284 }
 285
 286 void BookView::addBookmark()
 287 {
 288     Trace t("BookView::addBookmark");
 289     if (!mBook) {
 290         return;
 291     }
 292     int y = page()->mainFrame()->scrollPosition().y();
 293     int height = page()->mainFrame()->contentsSize().height();
 294     qDebug() << ((qreal)y / (qreal)height);
 295     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 296     update();
 297 }
 298
 299 QString BookView::tmpPath()
 300 {
 301     return QDir::tempPath() + "/dorian";
 302 }
 303
 304 bool BookView::eventFilter(QObject *o, QEvent *e)
 305 {
 306     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 307         if (e->type() == QEvent::Resize) {
 308             qDebug() << "BookView::eventFilter QEvent::Resize to"
 309                     << page()->mainFrame()->contentsSize().height();
 310         } else {
 311             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 312         }
 313     }
 314
 315     // Work around Qt bug that sometimes selects web view contents during swipe
 316     switch (e->type()) {
 317     case QEvent::MouseButtonPress:
 318         emit suppressedMouseButtonPress();
 319         mousePressed = true;
 320         break;
 321     case QEvent::MouseButtonRelease:
 322         showProgress();
 323         mousePressed = false;
 324         break;
 325     case QEvent::MouseMove:
 326         if (mousePressed) {
 327             return true;
 328         }
 329         break;
 330     case QEvent::MouseButtonDblClick:
 331         return true;
 332     default:
 333         break;
 334     }
 335
 336     return QObject::eventFilter(o, e);
 337 }
 338
 339 void BookView::addJavaScriptObjects()
 340 {
 341     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 342 }
 343
 344 void BookView::onContentsSizeChanged(const QSize &size)
 345 {
 346     contentsHeight = size.height();
 347     if (restorePositionAfterLoad) {
 348         qDebug() << "BookView::onContentSizeChanged: Time to restore";
 349         restorePositionAfterLoad = false;
 350         goToPosition(positionAfterLoad);
 351     }
 352 }
 353
 354 void BookView::leaveEvent(QEvent *e)
 355 {
 356     Trace t("BookView::leaveEvent");
 357     // Save current position, to be restored later
 358     setLastBookmark();
 359     QWebView::leaveEvent(e);
 360 }
 361
 362 void BookView::enterEvent(QEvent *e)
 363 {
 364     Trace t("BookView::enterEvent");
 365     // Restore position saved at Leave event. This seems to be required,
 366     // after temporarily switching from portrait to landscape and back
 367     restoreLastBookmark();
 368     QWebView::enterEvent(e);
 369 }
 370
 371 void BookView::goToPosition(qreal position)
 372 {
 373     int scrollPos = (int)((qreal)contentsHeight * position);
 374     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 375     // FIXME: update();
 376     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 377             << (position * 100) << "%, height" << contentsHeight << ")";
 378 }
 379
 380 void BookView::showProgress()
 381 {
 382     if (mBook) {
 383         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 384                     (qreal)contentsHeight;
 385         emit progress(mBook->getProgress(contentIndex, pos));
 386     }
 387 }
 388
 389 void BookView::timerEvent(QTimerEvent *e)
 390 {
 391     if (e->timerId() == scrollerMonitor) {
 392 #ifdef Q_WS_MAEMO_5
 393         if (scroller &&
 394             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 395              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 396             showProgress();
 397         } else {
 398             killTimer(scrollerMonitor);
 399         }
 400 #endif // Q_WS_MAEMO_5
 401     }
 402 }
 403
 404 void BookView::keyPressEvent(QKeyEvent* event)
 405 {
 406     switch (event->key()) {
 407     case Qt::Key_F7:
 408         goNextPage();
 409         event->accept();
 410         break;
 411     case Qt::Key_F8:
 412         goPreviousPage();
 413         event->accept();
 414         break;
 415     default:
 416         ;
 417     }
 418     QWebView::keyPressEvent(event);
 419 }
 420
 421 void BookView::goPreviousPage()
 422 {
 423     QWebFrame *frame = page()->mainFrame();
 424     int pos = frame->scrollPosition().y();
 425     frame->scroll(0, -height());
 426     if (pos == frame->scrollPosition().y()) {
 427         if (contentIndex > 0) {
 428             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 429             mBook->setLastBookmark(contentIndex - 1, 1.0);
 430             goToBookmark(bookmark);
 431         }
 432     } else {
 433         showProgress();
 434     }
 435 }
 436
 437 void BookView::goNextPage()
 438 {
 439     Trace t("BookView::goNextPage");
 440     QWebFrame *frame = page()->mainFrame();
 441     int pos = frame->scrollPosition().y();
 442     frame->scroll(0, height());
 443     if (pos == frame->scrollPosition().y()) {
 444         goNext();
 445     } else {
 446         setLastBookmark();
 447         showProgress();
 448     }
 449 }