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         load(QUrl(mBook->rootPath() + "/" + contentFile));
 109     }
 110     contentIndex = index;
 111 }
 112
 113 void BookView::setBook(Book *book)
 114 {
 115     Trace t("BookView::setBook");
 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 t("BookView::goPrevious");
 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 t("BookView::goNext");
 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 t("BookView::setLastBookmark");
 166     if (mBook) {
 167         int height = contentsHeight;
 168         int pos = page()->mainFrame()->scrollPosition().y();
 169         qDebug() << QString("At %1 (%2%, height %3)").
 170                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height);
 171         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 172     }
 173 }
 174
 175 void BookView::restoreLastBookmark()
 176 {
 177     Trace t("BookView::restoreLastBookmark");
 178     if (mBook) {
 179         goToBookmark(mBook->lastBookmark());
 180     }
 181 }
 182
 183 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 184 {
 185     Trace t("BookView::goToBookmark");
 186     if (mBook) {
 187         if (bookmark.part != contentIndex) {
 188             qDebug () << "Loading new part" << bookmark.part;
 189             mBook->setLastBookmark(bookmark.part, bookmark.pos);
 190             restorePositionAfterLoad = true;
 191             positionAfterLoad = bookmark.pos;
 192             loadContent(bookmark.part);
 193         } else {
 194             goToPosition(bookmark.pos);
 195         }
 196     }
 197 }
 198
 199 void BookView::onLoadFinished(bool ok)
 200 {
 201     Trace t("BookView::onLoadFinished");
 202     if (!ok) {
 203         qDebug() << "Not OK";
 204         return;
 205     }
 206     loaded = true;
 207     onSettingsChanged("scheme");
 208     emit partLoadEnd(contentIndex);
 209     showProgress();
 210 }
 211
 212 void BookView::onSettingsChanged(const QString &key)
 213 {
 214     Trace t("BookView::onSettingsChanged " + key);
 215     if (key == "zoom") {
 216         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 217     }
 218     else if (key == "font") {
 219         QString face = Settings::instance()->value("font").toString();
 220         settings()->setFontFamily(QWebSettings::StandardFont, face);
 221     }
 222     else if (key == "scheme") {
 223         QWebFrame *frame = page()->mainFrame();
 224         QString scheme = Settings::instance()->value("scheme").toString();
 225         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 226             (scheme != "default")) {
 227             scheme = "default";
 228         }
 229         QFile script(":/styles/" + scheme + ".js");
 230         script.open(QFile::ReadOnly);
 231         QString scriptText = script.readAll();
 232         script.close();
 233         QVariant ret = frame->evaluateJavaScript(scriptText);
 234     }
 235 }
 236
 237 void BookView::paintEvent(QPaintEvent *e)
 238 {
 239     QWebView::paintEvent(e);
 240     if (!mBook || !loaded) {
 241         return;
 242     }
 243
 244     // Paint bookmarks
 245     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 246     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 247     QPainter painter(this);
 248     foreach (Book::Bookmark b, mBook->bookmarks()) {
 249         if (b.part != contentIndex) {
 250             continue;
 251         }
 252         int height = contentsHeight;
 253         int bookmarkPos = (int)((qreal)height * (qreal)b.pos);
 254         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 255     }
 256 }
 257
 258 void BookView::mousePressEvent(QMouseEvent *e)
 259 {
 260     QWebView::mousePressEvent(e);
 261 #ifdef Q_WS_MAEMO_5
 262     // Start monitoring kinetic scroll
 263     if (scroller) {
 264         scrollerMonitor = startTimer(250);
 265     }
 266 #else
 267     // Handle mouse presses on the scroll bar
 268     QWebFrame *frame = page()->mainFrame();
 269     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 270         e->accept();
 271         return;
 272     }
 273 #endif // Q_WS_MAEMO_5
 274     e->ignore();
 275 }
 276
 277 void BookView::wheelEvent(QWheelEvent *e)
 278 {
 279     QWebView::wheelEvent(e);
 280     showProgress();
 281 }
 282
 283 void BookView::addBookmark()
 284 {
 285     Trace t("BookView::addBookmark");
 286     if (!mBook) {
 287         return;
 288     }
 289     int y = page()->mainFrame()->scrollPosition().y();
 290     int height = page()->mainFrame()->contentsSize().height();
 291     qDebug() << ((qreal)y / (qreal)height);
 292     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 293     update();
 294 }
 295
 296 QString BookView::tmpPath()
 297 {
 298     return QDir::tempPath() + "/dorian";
 299 }
 300
 301 bool BookView::eventFilter(QObject *o, QEvent *e)
 302 {
 303     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 304         if (e->type() == QEvent::Resize) {
 305             qDebug() << "BookView::eventFilter QEvent::Resize to"
 306                     << page()->mainFrame()->contentsSize().height();
 307         } else {
 308             qDebug() << "BookView::eventFilter" << Trace::event(e->type());
 309         }
 310     }
 311
 312     // Work around Qt bug that sometimes selects web view contents during swipe
 313     switch (e->type()) {
 314     case QEvent::MouseButtonPress:
 315         emit suppressedMouseButtonPress();
 316         mousePressed = true;
 317         break;
 318     case QEvent::MouseButtonRelease:
 319         showProgress();
 320         mousePressed = false;
 321         break;
 322     case QEvent::MouseMove:
 323         if (mousePressed) {
 324             return true;
 325         }
 326         break;
 327     case QEvent::MouseButtonDblClick:
 328         return true;
 329     default:
 330         break;
 331     }
 332
 333     return QObject::eventFilter(o, e);
 334 }
 335
 336 void BookView::addJavaScriptObjects()
 337 {
 338     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 339 }
 340
 341 void BookView::onContentsSizeChanged(const QSize &size)
 342 {
 343     contentsHeight = size.height();
 344     if (restorePositionAfterLoad) {
 345         qDebug() << "BookView::onContentSizeChanged: Time to restore";
 346         restorePositionAfterLoad = false;
 347         goToPosition(positionAfterLoad);
 348     }
 349 }
 350
 351 void BookView::leaveEvent(QEvent *e)
 352 {
 353     Trace t("BookView::leaveEvent");
 354     // Save current position, to be restored later
 355     setLastBookmark();
 356     QWebView::leaveEvent(e);
 357 }
 358
 359 void BookView::enterEvent(QEvent *e)
 360 {
 361     Trace t("BookView::enterEvent");
 362     // Restore position saved at Leave event. This seems to be required,
 363     // after temporarily switching from portrait to landscape and back
 364     restoreLastBookmark();
 365     QWebView::enterEvent(e);
 366 }
 367
 368 void BookView::goToPosition(qreal position)
 369 {
 370     int scrollPos = (int)((qreal)contentsHeight * position);
 371     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 372     // FIXME: update();
 373     qDebug() << "BookView::goToPosition: To" << scrollPos << "("
 374             << (position * 100) << "%, height" << contentsHeight << ")";
 375 }
 376
 377 void BookView::showProgress()
 378 {
 379     if (mBook) {
 380         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 381                     (qreal)contentsHeight;
 382         emit progress(mBook->getProgress(contentIndex, pos));
 383     }
 384 }
 385
 386 void BookView::timerEvent(QTimerEvent *e)
 387 {
 388     if (e->timerId() == scrollerMonitor) {
 389 #ifdef Q_WS_MAEMO_5
 390         if (scroller &&
 391             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 392              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 393             showProgress();
 394         } else {
 395             killTimer(scrollerMonitor);
 396         }
 397 #endif // Q_WS_MAEMO_5
 398     }
 399 }
 400
 401 void BookView::keyPressEvent(QKeyEvent* event)
 402 {
 403     switch (event->key()) {
 404     case Qt::Key_F7:
 405         goNextPage();
 406         event->accept();
 407         break;
 408     case Qt::Key_F8:
 409         goPreviousPage();
 410         event->accept();
 411         break;
 412     default:
 413         ;
 414     }
 415     QWebView::keyPressEvent(event);
 416 }
 417
 418 void BookView::goPreviousPage()
 419 {
 420     QWebFrame *frame = page()->mainFrame();
 421     int pos = frame->scrollPosition().y();
 422     frame->scroll(0, -height());
 423     if (pos == frame->scrollPosition().y()) {
 424         if (contentIndex > 0) {
 425             Book::Bookmark bookmark(contentIndex - 1, 1.0);
 426             mBook->setLastBookmark(contentIndex - 1, 1.0);
 427             goToBookmark(bookmark);
 428         }
 429     } else {
 430         showProgress();
 431     }
 432 }
 433
 434 void BookView::goNextPage()
 435 {
 436     Trace t("BookView::goNextPage");
 437     QWebFrame *frame = page()->mainFrame();
 438     int pos = frame->scrollPosition().y();
 439     frame->scroll(0, height());
 440     if (pos == frame->scrollPosition().y()) {
 441         goNext();
 442     } else {
 443         setLastBookmark();
 444         showProgress();
 445     }
 446 }