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), decorated(false), 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     extractIcons();
  82 #ifdef Q_WS_MAEMO_5
  83     scroller = property("kineticScroller").value<QAbstractKineticScroller *>();
  84 #endif
  85 }
  86
  87 BookView::~BookView()
  88 {
  89     Trace t("BookView::~BookView");
  90     removeIcons();
  91 }
  92
  93 void BookView::loadContent(int index)
  94 {
  95     Trace t("BookView::loadContent");
  96     if (!mBook) {
  97         return;
  98     }
  99     if ((index < 0) || (index >= mBook->parts.size())) {
 100         return;
 101     }
 102
 103     QString contentFile(mBook->content[mBook->parts[index]].href);
 104     if (mBook->parts[index] == "error") {
 105         setHtml(contentFile);
 106     }
 107     else {
 108         loaded = false;
 109         decorated = false;
 110         emit partLoadStart(index);
 111         load(QUrl(contentFile));
 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         t.trace(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             t.trace(QString("Loading new part %1").arg(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         t.trace("Not OK");
 207         return;
 208     }
 209     loaded = true;
 210     addNavigationBar();
 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 = (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 (scroller) {
 268         scrollerMonitor = startTimer(250);
 269     }
 270 #else
 271     // Handle mouse presses on the scroll bar
 272     QWebFrame *frame = page()->mainFrame();
 273     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 274         e->accept();
 275         return;
 276     }
 277 #endif // Q_WS_MAEMO_5
 278     e->ignore();
 279 }
 280
 281 void BookView::wheelEvent(QWheelEvent *e)
 282 {
 283     QWebView::wheelEvent(e);
 284     showProgress();
 285 }
 286
 287 void BookView::addBookmark()
 288 {
 289     Trace t("BookView::addBookmark");
 290     if (!mBook) {
 291         return;
 292     }
 293     int y = page()->mainFrame()->scrollPosition().y();
 294     int height = page()->mainFrame()->contentsSize().height();
 295     t.trace(QString().setNum((qreal)y / (qreal)height));
 296     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 297     update();
 298 }
 299
 300 void BookView::addNavigationBar()
 301 {
 302     Trace t("BookView::addNavigationBar");
 303     if (!mBook) {
 304         return;
 305     }
 306
 307     QString naviPrev =
 308             "<a href=\"javascript:bv.goPrevious();\">"
 309             "<img width=\"95\" height=\"95\" style=\"float:left;clear:none;\" "
 310             "src=\"file://"
 311             + tmpPath() +
 312             "/previous.png\" />"
 313             "</a>";
 314     QString naviNext =
 315             "<a href=\"javascript:bv.goNext();\">"
 316             "<img width=\"95\" height=\"95\" style=\"float:right;clear:none;\" "
 317             "src=\"file://"
 318             + tmpPath() +
 319             "/next.png\" />"
 320             "</a>";
 321     if (contentIndex == 0) {
 322         naviPrev = "";
 323     }
 324     if (contentIndex >= mBook->parts.size() - 1) {
 325         naviNext = "";
 326     }
 327
 328     QWebFrame *frame = page()->currentFrame();
 329     QString headerScript = "document.body.innerHTML = '" +
 330         naviPrev + naviNext + "<br />" + "' + document.body.innerHTML;";
 331     QString trailerScript = "document.body.innerHTML += '<br /><br />" +
 332         naviPrev + naviNext + "';";
 333
 334     frame->evaluateJavaScript(headerScript);
 335     frame->evaluateJavaScript(trailerScript);
 336     decorated = true;
 337 }
 338
 339 QString BookView::tmpPath()
 340 {
 341     return QDir::tempPath() + "/dorian";
 342 }
 343
 344 void BookView::extractIcons()
 345 {
 346     QFile next(ICON_PREFIX + QString("/next.png"));
 347     QFile prev(ICON_PREFIX + QString("/previous.png"));
 348
 349     QDir().mkpath(tmpPath());
 350     next.copy(tmpPath() + "/next.png");
 351     prev.copy(tmpPath() + "/previous.png");
 352 }
 353
 354 void BookView::removeIcons()
 355 {
 356     QFile(ICON_PREFIX + QString("/next.png")).remove();
 357     QFile(ICON_PREFIX + QString("/previous.png")).remove();
 358     QDir().rmpath(tmpPath());
 359 }
 360
 361 bool BookView::eventFilter(QObject *o, QEvent *e)
 362 {
 363     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 364         if (e->type() == QEvent::Resize) {
 365             Trace::trace(QString("BookView::eventFilter QEvent::Resize to %1").
 366                          arg(page()->mainFrame()->contentsSize().height()));
 367         } else {
 368             Trace::trace(QString("BookView::eventFilter %1").
 369                          arg(Trace::event(e->type())));
 370         }
 371     }
 372
 373     // Work around Qt bug that sometimes selects web view contents during swipe
 374     switch (e->type()) {
 375     case QEvent::MouseButtonPress:
 376         emit suppressedMouseButtonPress();
 377         mousePressed = true;
 378         break;
 379     case QEvent::MouseButtonRelease:
 380         showProgress();
 381         mousePressed = false;
 382         break;
 383     case QEvent::MouseMove:
 384         if (mousePressed) {
 385             return true;
 386         }
 387         break;
 388     case QEvent::MouseButtonDblClick:
 389         return true;
 390     default:
 391         break;
 392     }
 393
 394     return QObject::eventFilter(o, e);
 395 }
 396
 397 void BookView::addJavaScriptObjects()
 398 {
 399     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 400 }
 401
 402 void BookView::onContentsSizeChanged(const QSize &size)
 403 {
 404     contentsHeight = size.height();
 405     if (decorated) {
 406         if (restorePositionAfterLoad) {
 407             Trace::trace("BookView::onContentSizeChanged: Time to restore");
 408             restorePositionAfterLoad = false;
 409             goToPosition(positionAfterLoad);
 410         }
 411     }
 412 }
 413
 414 void BookView::leaveEvent(QEvent *e)
 415 {
 416     Trace t("BookView::leaveEvent");
 417     // Save current position, to be restored later
 418     setLastBookmark();
 419     QWebView::leaveEvent(e);
 420 }
 421
 422 void BookView::enterEvent(QEvent *e)
 423 {
 424     Trace t("BookView::enterEvent");
 425     // Restore position saved at Leave event. This seems to be required,
 426     // after temporarily switching from portrait to landscape and back
 427     restoreLastBookmark();
 428     QWebView::enterEvent(e);
 429 }
 430
 431 void BookView::goToPosition(qreal position)
 432 {
 433     int scrollPos = (qreal)contentsHeight * position;
 434     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 435     // FIXME: update();
 436     Trace::trace(QString("BookView::goToPosition: To %1 (%2%, height %3)").
 437             arg(scrollPos).arg(position * 100).arg(contentsHeight));
 438 }
 439
 440 void BookView::showProgress()
 441 {
 442     if (mBook) {
 443         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 444                     (qreal)contentsHeight;
 445         emit progress(mBook->getProgress(contentIndex, pos));
 446     }
 447 }
 448
 449 void BookView::timerEvent(QTimerEvent *e)
 450 {
 451     if (e->timerId() == scrollerMonitor) {
 452 #ifdef Q_WS_MAEMO_5
 453         if (scroller &&
 454             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 455              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 456             showProgress();
 457         } else {
 458             killTimer(scrollerMonitor);
 459         }
 460 #endif // Q_WS_MAEMO_5
 461     }
 462 }
 463
 464 void BookView::keyPressEvent(QKeyEvent* event)
 465 {
 466     switch (event->key()) {
 467     case Qt::Key_F7:
 468         goNextPage();
 469         event->accept();
 470         break;
 471     case Qt::Key_F8:
 472         goPreviousPage();
 473         event->accept();
 474         break;
 475     default:
 476         ;
 477     }
 478     QWebView::keyPressEvent(event);
 479 }
 480
 481 void BookView::goPreviousPage()
 482 {
 483     QWebFrame *frame = page()->mainFrame();
 484     int pos = frame->scrollPosition().y();
 485     frame->scroll(0, -height());
 486     if (pos == frame->scrollPosition().y()) {
 487         if (contentIndex > 0) {
 488             goToBookmark(Book::Bookmark(contentIndex - 1, 1.0));
 489         }
 490     } else {
 491         showProgress();
 492     }
 493 }
 494
 495 void BookView::goNextPage()
 496 {
 497     Trace t("BookView::goNextPage");
 498     QWebFrame *frame = page()->mainFrame();
 499     int pos = frame->scrollPosition().y();
 500     frame->scroll(0, height());
 501     if (pos == frame->scrollPosition().y()) {
 502         goNext();
 503     } else {
 504         showProgress();
 505     }
 506 }