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     loadContent(contentIndex - 1);
 152 }
 153
 154 void BookView::goNext()
 155 {
 156     Trace t("BookView::goNext");
 157     loadContent(contentIndex + 1);
 158 }
 159
 160 void BookView::setLastBookmark()
 161 {
 162     Trace t("BookView::setLastBookmark");
 163     if (mBook) {
 164         int height = contentsHeight;
 165         int pos = page()->mainFrame()->scrollPosition().y();
 166         t.trace(QString("At %1 (%2%, height %3)").
 167                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height));
 168         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 169     }
 170 }
 171
 172 void BookView::restoreLastBookmark()
 173 {
 174     Trace t("BookView::restoreLastBookmark");
 175     if (mBook) {
 176         goToBookmark(mBook->lastBookmark());
 177     }
 178 }
 179
 180 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 181 {
 182     Trace t("BookView::goToBookmark");
 183     if (mBook) {
 184         if (bookmark.part != contentIndex) {
 185             t.trace(QString("Loading new part %1").arg(bookmark.part));
 186             mBook->setLastBookmark(bookmark.part, bookmark.pos);
 187             restorePositionAfterLoad = true;
 188             positionAfterLoad = bookmark.pos;
 189             loadContent(bookmark.part);
 190         } else {
 191             goToPosition(bookmark.pos);
 192         }
 193     }
 194 }
 195
 196 void BookView::onLoadFinished(bool ok)
 197 {
 198     Trace t("BookView::onLoadFinished");
 199     if (!ok) {
 200         t.trace("Not OK");
 201         return;
 202     }
 203     loaded = true;
 204     addNavigationBar();
 205     onSettingsChanged("scheme");
 206     emit partLoadEnd(contentIndex);
 207     showProgress();
 208 }
 209
 210 void BookView::onSettingsChanged(const QString &key)
 211 {
 212     Trace t("BookView::onSettingsChanged " + key);
 213     if (key == "zoom") {
 214         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 215     }
 216     else if (key == "font") {
 217         QString face = Settings::instance()->value("font").toString();
 218         settings()->setFontFamily(QWebSettings::StandardFont, face);
 219     }
 220     else if (key == "scheme") {
 221         QWebFrame *frame = page()->mainFrame();
 222         QString scheme = Settings::instance()->value("scheme").toString();
 223         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 224             (scheme != "default")) {
 225             scheme = "default";
 226         }
 227         QFile script(":/styles/" + scheme + ".js");
 228         script.open(QFile::ReadOnly);
 229         QString scriptText = script.readAll();
 230         script.close();
 231         QVariant ret = frame->evaluateJavaScript(scriptText);
 232     }
 233 }
 234
 235 void BookView::paintEvent(QPaintEvent *e)
 236 {
 237     QWebView::paintEvent(e);
 238     if (!mBook || !loaded) {
 239         return;
 240     }
 241
 242     // Paint bookmarks
 243     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 244     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 245     QPainter painter(this);
 246     foreach (Book::Bookmark b, mBook->bookmarks()) {
 247         if (b.part != contentIndex) {
 248             continue;
 249         }
 250         int height = contentsHeight;
 251         int bookmarkPos = (qreal)height * (qreal)b.pos;
 252         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 253     }
 254 }
 255
 256 void BookView::mousePressEvent(QMouseEvent *e)
 257 {
 258     QWebView::mousePressEvent(e);
 259 #ifdef Q_WS_MAEMO_5
 260     if (scroller) {
 261         scrollerMonitor = startTimer(250);
 262     }
 263 #else
 264     QWebFrame *frame = page()->mainFrame();
 265     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 266         e->accept();
 267         return;
 268     }
 269 #endif // Q_WS_MAEMO_5
 270     e->ignore();
 271 }
 272
 273 void BookView::wheelEvent(QWheelEvent *e)
 274 {
 275     QWebView::wheelEvent(e);
 276     showProgress();
 277 }
 278
 279 void BookView::addBookmark()
 280 {
 281     Trace t("BookView::addBookmark");
 282     if (!mBook) {
 283         return;
 284     }
 285     int y = page()->mainFrame()->scrollPosition().y();
 286     int height = page()->mainFrame()->contentsSize().height();
 287     t.trace(QString().setNum((qreal)y / (qreal)height));
 288     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 289     update();
 290 }
 291
 292 void BookView::addNavigationBar()
 293 {
 294     Trace t("BookView::addNavigationBar");
 295     if (!mBook) {
 296         return;
 297     }
 298
 299     QString naviPrev =
 300             "<a href=\"javascript:bv.goPrevious();\">"
 301             "<img width=\"95\" height=\"95\" style=\"float:left;clear:none;\" "
 302             "src=\"file://"
 303             + tmpPath() +
 304             "/previous.png\" />"
 305             "</a>";
 306     QString naviNext =
 307             "<a href=\"javascript:bv.goNext();\">"
 308             "<img width=\"95\" height=\"95\" style=\"float:right;clear:none;\" "
 309             "src=\"file://"
 310             + tmpPath() +
 311             "/next.png\" />"
 312             "</a>";
 313     if (contentIndex == 0) {
 314         naviPrev = "";
 315     }
 316     if (contentIndex >= mBook->parts.size() - 1) {
 317         naviNext = "";
 318     }
 319
 320     QWebFrame *frame = page()->currentFrame();
 321     QString headerScript = "document.body.innerHTML = '" +
 322         naviPrev + naviNext + "<br />" + "' + document.body.innerHTML;";
 323     QString trailerScript = "document.body.innerHTML += '<br /><br />" +
 324         naviPrev + naviNext + "';";
 325
 326     frame->evaluateJavaScript(headerScript);
 327     frame->evaluateJavaScript(trailerScript);
 328     decorated = true;
 329 }
 330
 331 QString BookView::tmpPath()
 332 {
 333     return QDir::tempPath() + "/dorian";
 334 }
 335
 336 void BookView::extractIcons()
 337 {
 338     QFile next(ICON_PREFIX + QString("/next.png"));
 339     QFile prev(ICON_PREFIX + QString("/previous.png"));
 340
 341     QDir().mkpath(tmpPath());
 342     next.copy(tmpPath() + "/next.png");
 343     prev.copy(tmpPath() + "/previous.png");
 344 }
 345
 346 void BookView::removeIcons()
 347 {
 348     QFile(ICON_PREFIX + QString("/next.png")).remove();
 349     QFile(ICON_PREFIX + QString("/previous.png")).remove();
 350     QDir().rmpath(tmpPath());
 351 }
 352
 353 bool BookView::eventFilter(QObject *o, QEvent *e)
 354 {
 355     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 356         if (e->type() == QEvent::Resize) {
 357             Trace::trace(QString("BookView::eventFilter QEvent::Resize to %1").
 358                          arg(page()->mainFrame()->contentsSize().height()));
 359         } else {
 360             Trace::trace(QString("BookView::eventFilter %1").
 361                          arg(Trace::event(e->type())));
 362         }
 363     }
 364
 365     switch (e->type()) {
 366     case QEvent::MouseButtonPress:
 367         emit suppressedMouseButtonPress();
 368         mousePressed = true;
 369         break;
 370     case QEvent::MouseButtonRelease:
 371         showProgress();
 372         mousePressed = false;
 373         break;
 374     case QEvent::MouseMove:
 375         if (mousePressed) {
 376             return true;
 377         }
 378         break;
 379     case QEvent::MouseButtonDblClick:
 380         return true;
 381     default:
 382         break;
 383     }
 384
 385     return QObject::eventFilter(o, e);
 386 }
 387
 388 void BookView::addJavaScriptObjects()
 389 {
 390     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 391 }
 392
 393 void BookView::onContentsSizeChanged(const QSize &size)
 394 {
 395     contentsHeight = size.height();
 396     if (decorated) {
 397         if (restorePositionAfterLoad) {
 398             Trace::trace("BookView::onContentSizeChanged: Time to restore");
 399             restorePositionAfterLoad = false;
 400             goToPosition(positionAfterLoad);
 401         }
 402     }
 403 }
 404
 405 void BookView::leaveEvent(QEvent *e)
 406 {
 407     Trace t("BookView::leaveEvent");
 408     // Save current position, to be restored later
 409     setLastBookmark();
 410     QWebView::leaveEvent(e);
 411 }
 412
 413 void BookView::enterEvent(QEvent *e)
 414 {
 415     Trace t("BookView::enterEvent");
 416     // Restore position saved at Leave event. This seems to be required,
 417     // after temporarily switching from portrait to landscape and back
 418     restoreLastBookmark();
 419     QWebView::enterEvent(e);
 420 }
 421
 422 void BookView::goToPosition(qreal position)
 423 {
 424     int scrollPos = (qreal)contentsHeight * position;
 425     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 426     // FIXME: update();
 427     Trace::trace(QString("BookView::goToPosition: To %1 (%2%, height %3)").
 428             arg(scrollPos).arg(position * 100).arg(contentsHeight));
 429 }
 430
 431 void BookView::showProgress()
 432 {
 433     if (mBook) {
 434         qreal pos = (qreal)(page()->mainFrame()->scrollPosition().y()) /
 435                     (qreal)contentsHeight;
 436         emit progress(mBook->getProgress(contentIndex, pos));
 437     }
 438 }
 439
 440 void BookView::timerEvent(QTimerEvent *e)
 441 {
 442     if (e->timerId() == scrollerMonitor) {
 443 #ifdef Q_WS_MAEMO_5
 444         if (scroller &&
 445             ((scroller->state() == QAbstractKineticScroller::AutoScrolling) ||
 446              (scroller->state() == QAbstractKineticScroller::Pushing))) {
 447             showProgress();
 448         } else {
 449             killTimer(scrollerMonitor);
 450         }
 451 #endif // Q_WS_MAEMO_5
 452     }
 453 }
 454
 455 void BookView::keyPressEvent(QKeyEvent* event)
 456 {
 457     switch (event->key()) {
 458     case Qt::Key_F7:
 459         goNextPage();
 460         event->accept();
 461         break;
 462     case Qt::Key_F8:
 463         goPreviousPage();
 464         event->accept();
 465         break;
 466     default:
 467         ;
 468     }
 469     QWebView::keyPressEvent(event);
 470 }
 471
 472 void BookView::goPreviousPage()
 473 {
 474     QWebFrame *frame = page()->mainFrame();
 475     int pos = frame->scrollPosition().y();
 476     frame->scroll(0, -height());
 477     if (pos == frame->scrollPosition().y()) {
 478         if (contentIndex > 0) {
 479             goToBookmark(Book::Bookmark(contentIndex - 1, 1.0));
 480         }
 481     } else {
 482         showProgress();
 483     }
 484 }
 485
 486 void BookView::goNextPage()
 487 {
 488     Trace t("BookView::goNextPage");
 489     QWebFrame *frame = page()->mainFrame();
 490     int pos = frame->scrollPosition().y();
 491     frame->scroll(0, height());
 492     if (pos == frame->scrollPosition().y()) {
 493         goNext();
 494     } else {
 495         showProgress();
 496     }
 497 }