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     }
 270     if (scroller) {
 271         scrollerMonitor = startTimer(500);
 272     }
 273 #else
 274     // Handle mouse presses on the scroll bar
 275     QWebFrame *frame = page()->mainFrame();
 276     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 277         e->accept();
 278         return;
 279     }
 280 #endif // Q_WS_MAEMO_5
 281     e->ignore();
 282 }
 283
 284 void BookView::wheelEvent(QWheelEvent *e)
 285 {
 286     QWebView::wheelEvent(e);
 287     showProgress();
 288 }
 289
 290 void BookView::addBookmark()
 291 {
 292     Trace t("BookView::addBookmark");
 293     if (!mBook) {
 294         return;
 295     }
 296     int y = page()->mainFrame()->scrollPosition().y();
 297     int height = page()->mainFrame()->contentsSize().height();
 298     qDebug() << ((qreal)y / (qreal)height);
 299     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 300     update();
 301 }
 302
 303 QString BookView::tmpPath()
 304 {
 305     return QDir::tempPath() + "/dorian";
 306 }
 307
 308 bool BookView::eventFilter(QObject *o, QEvent *e)
 309 {
 310     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 311         if (e->type() == QEvent::Resize) {
 312             qDebug() << "BookView::eventFilter QEvent::Resize to"
 313                     << page()->mainFrame()->contentsSize().height();
 314         } else if (e->type() == QEvent::Timer) {
 315             qDebug() << "BookView::eventFilter" << "QEvent::Timer"
 316                     << ((QTimerEvent *)e)->timerId();
 317         } else {
 318             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 319         }
 320     }
 321
 322     // Work around Qt bug that sometimes selects web view contents during swipe
 323     switch (e->type()) {
 324     case QEvent::MouseButtonPress:
 325         emit suppressedMouseButtonPress();
 326         mousePressed = true;
 327         break;
 328     case QEvent::MouseButtonRelease:
 329         showProgress();
 330         mousePressed = false;
 331         break;
 332     case QEvent::MouseMove:
 333         if (mousePressed) {
 334             return true;
 335         }
 336         break;
 337     case QEvent::MouseButtonDblClick:
 338         return true;
 339     default:
 340         break;
 341     }
 342
 343     return QObject::eventFilter(o, e);
 344 }
 345
 346 void BookView::addJavaScriptObjects()
 347 {
 348     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 349 }
 350
 351 void BookView::onContentsSizeChanged(const QSize &size)
 352 {
 353     contentsHeight = size.height();
 354     if (restorePositionAfterLoad) {
 355         qDebug() << "BookView::onContentSizeChanged: Time to restore";
 356         restorePositionAfterLoad = false;
 357         goToPosition(positionAfterLoad);
 358     }
 359 }
 360
 361 void BookView::leaveEvent(QEvent *e)
 362 {
 363     Trace t("BookView::leaveEvent");
 364     // Save current position, to be restored later
 365     setLastBookmark();
 366     QWebView::leaveEvent(e);
 367 }
 368
 369 void BookView::enterEvent(QEvent *e)
 370 {
 371     Trace t("BookView::enterEvent");
 372     // Restore position saved at Leave event. This seems to be required,
 373     // after temporarily switching from portrait to landscape and back
 374     restoreLastBookmark();
 375     QWebView::enterEvent(e);
 376 }
 377
 378 void BookView::goToPosition(qreal position)
 379 {
 380     int scrollPos = (int)((qreal)contentsHeight * position);
 381     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 382     // FIXME: update();
 383     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 384             << (position * 100) << "%, height" << contentsHeight << ")";
 385 }
 386
 387 void BookView::showProgress()
 388 {
 389     if (mBook) {
 390         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 391                     (qreal)contentsHeight;
 392         emit progress(mBook->getProgress(contentIndex, pos));
 393     }
 394 }
 395
 396 void BookView::timerEvent(QTimerEvent *e)
 397 {
 398     if (e->timerId() == scrollerMonitor) {
 399 #ifdef Q_WS_MAEMO_5
 400         if (scroller &&
 401             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 402              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 403             showProgress();
 404         } else {
 405             killTimer(scrollerMonitor);
 406         }
 407 #endif // Q_WS_MAEMO_5
 408     }
 409 }
 410
 411 void BookView::keyPressEvent(QKeyEvent* event)
 412 {
 413     switch (event->key()) {
 414     case Qt::Key_F7:
 415         goNextPage();
 416         event->accept();
 417         break;
 418     case Qt::Key_F8:
 419         goPreviousPage();
 420         event->accept();
 421         break;
 422     default:
 423         ;
 424     }
 425     QWebView::keyPressEvent(event);
 426 }
 427
 428 void BookView::goPreviousPage()
 429 {
 430     QWebFrame *frame = page()->mainFrame();
 431     int pos = frame->scrollPosition().y();
 432     frame->scroll(0, -height());
 433     if (pos == frame->scrollPosition().y()) {
 434         if (contentIndex > 0) {
 435             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 436             mBook->setLastBookmark(contentIndex - 1, 1.0);
 437             goToBookmark(bookmark);
 438         }
 439     } else {
 440         showProgress();
 441     }
 442 }
 443
 444 void BookView::goNextPage()
 445 {
 446     Trace t("BookView::goNextPage");
 447     QWebFrame *frame = page()->mainFrame();
 448     int pos = frame->scrollPosition().y();
 449     frame->scroll(0, height());
 450     if (pos == frame->scrollPosition().y()) {
 451         goNext();
 452     } else {
 453         setLastBookmark();
 454         showProgress();
 455     }
 456 }