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 #include "book.h"
   9 #include "bookview.h"
  10 #include "library.h"
  11 #include "settings.h"
  12 #include "trace.h"
  13
  14 #ifdef Q_WS_MAC
  15 #   define ICON_PREFIX ":/icons/mac/"
  16 #else
  17 #   define ICON_PREFIX ":/icons/"
  18 #endif
  19
  20 BookView::BookView(QWidget *parent):
  21     QWebView(parent), contentIndex(-1), mBook(0), restorePositionAfterLoad(false),
  22     positionAfterLoad(0), loaded(false), contentsHeight(0), decorated(false)
  23 {
  24     Trace t("BookView::BookView");
  25     settings()->setAttribute(QWebSettings::AutoLoadImages, true);
  26     settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
  27     settings()->setAttribute(QWebSettings::JavaEnabled, false);
  28     settings()->setAttribute(QWebSettings::PluginsEnabled, false);
  29     settings()->setAttribute(QWebSettings::PrivateBrowsingEnabled, true);
  30     settings()->setAttribute(QWebSettings::JavascriptCanOpenWindows, false);
  31     settings()->setAttribute(QWebSettings::JavascriptCanAccessClipboard, false);
  32     settings()->setAttribute(QWebSettings::OfflineStorageDatabaseEnabled, false);
  33     settings()->setAttribute(QWebSettings::OfflineWebApplicationCacheEnabled, false);
  34     settings()->setAttribute(QWebSettings::LocalStorageEnabled, false);
  35     settings()->setAttribute(QWebSettings::ZoomTextOnly, true);
  36     settings()->setAttribute(QWebSettings::LocalContentCanAccessRemoteUrls,
  37                              false);
  38     settings()->setDefaultTextEncoding("utf-8");
  39     page()->setContentEditable(false);
  40
  41 #if defined(Q_WS_MAEMO_5)
  42     // Suppress unwanted text selections on Maemo
  43     installEventFilter(this);
  44 #endif
  45     QWebFrame *frame = page()->mainFrame();
  46 #if defined(Q_WS_MAEMO_5)
  47     frame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
  48 #endif
  49     frame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
  50
  51     bookmarkImage = QImage(":/icons/bookmark.png");
  52
  53     connect(this, SIGNAL(loadFinished(bool)), this, SLOT(onLoadFinished(bool)));
  54     connect(frame, SIGNAL(javaScriptWindowObjectCleared()),
  55             this, SLOT(addJavaScriptObjects()));
  56     connect(frame, SIGNAL(contentsSizeChanged(const QSize &)),
  57             this, SLOT(onContentsSizeChanged(const QSize &)));
  58     connect(Settings::instance(), SIGNAL(valueChanged(const QString &)),
  59             this, SLOT(onSettingsChanged(const QString &)));
  60     Settings *s = Settings::instance();
  61     s->setValue("zoom", s->value("zoom", 160));
  62     s->setValue("font", s->value("font",
  63 #if defined(Q_WS_MAEMO_5) || defined(Q_WS_X11)
  64                                  "Serif"
  65 #elif defined(Q_WS_MAC)
  66                                  "Hoefler Text"
  67 #else
  68                                  "Times New Roman"
  69 #endif
  70                                  ));
  71     s->setValue("scheme", s->value("scheme", "default"));
  72     setBook(0);
  73
  74     extractIcons();
  75 }
  76
  77 BookView::~BookView()
  78 {
  79     Trace t("BookView::~BookView");
  80     removeIcons();
  81 }
  82
  83 void BookView::loadContent(int index)
  84 {
  85     Trace t("BookView::loadContent");
  86     if (!mBook) {
  87         return;
  88     }
  89     if ((index < 0) || (index >= mBook->toc.size())) {
  90         return;
  91     }
  92
  93     QString contentFile(mBook->content[mBook->toc[index]].href);
  94     if (mBook->toc[index] == "error") {
  95         setHtml(contentFile);
  96     }
  97     else {
  98         loaded = false;
  99         decorated = false;
 100         emit chapterLoadStart(index);
 101         load(QUrl(contentFile));
 102     }
 103     contentIndex = index;
 104 }
 105
 106 void BookView::setBook(Book *book)
 107 {
 108     Trace t("BookView::setBook");
 109
 110     // Save position in current book
 111     setLastBookmark();
 112
 113     // Open new book, restore last position
 114     if (book != mBook) {
 115         mBook = book;
 116         if (book) {
 117             contentIndex = -1;
 118             book->open();
 119             restoreLastBookmark();
 120         }
 121         else {
 122             contentIndex = 0;
 123             setHtml(tr("No book"));
 124         }
 125     }
 126 }
 127
 128 Book *BookView::book()
 129 {
 130     return mBook;
 131 }
 132
 133 void BookView::goPrevious()
 134 {
 135     Trace t("BookView::goPrevious");
 136     loadContent(contentIndex - 1);
 137 }
 138
 139 void BookView::goNext()
 140 {
 141     Trace t("BookView::goNext");
 142     loadContent(contentIndex + 1);
 143 }
 144
 145 void BookView::setLastBookmark()
 146 {
 147     Trace t("BookView::setLastBookmark");
 148     if (mBook) {
 149         int height = contentsHeight;
 150         int pos = page()->mainFrame()->scrollPosition().y();
 151         t.trace(QString("At %1 (%2%, height %3)").
 152                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height));
 153         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 154     }
 155 }
 156
 157 void BookView::restoreLastBookmark()
 158 {
 159     Trace t("BookView::restoreLastBookmark");
 160     if (mBook) {
 161         goToBookmark(mBook->lastBookmark());
 162     }
 163 }
 164
 165 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 166 {
 167     Trace t("BookView::goToBookmark");
 168     if (mBook) {
 169         if (bookmark.chapter != contentIndex) {
 170             t.trace(QString("Loading new chapter %1").arg(bookmark.chapter));
 171             restorePositionAfterLoad = true;
 172             positionAfterLoad = bookmark.pos;
 173             loadContent(bookmark.chapter);
 174         } else {
 175             goToPosition(bookmark.pos);
 176         }
 177     }
 178 }
 179
 180 void BookView::onLoadFinished(bool ok)
 181 {
 182     Trace t("BookView::onLoadFinished");
 183     if (!ok) {
 184         t.trace("Not OK");
 185         return;
 186     }
 187     loaded = true;
 188     addNavigationBar();
 189     onSettingsChanged("scheme");
 190     emit chapterLoadEnd(contentIndex);
 191 }
 192
 193 void BookView::onSettingsChanged(const QString &key)
 194 {
 195     Trace t("BookView::onSettingsChanged " + key);
 196     if (key == "zoom") {
 197         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 198     }
 199     else if (key == "font") {
 200         QString face = Settings::instance()->value("font").toString();
 201         settings()->setFontFamily(QWebSettings::StandardFont, face);
 202     }
 203     else if (key == "scheme") {
 204         QWebFrame *frame = page()->mainFrame();
 205         QString scheme = Settings::instance()->value("scheme").toString();
 206         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 207             (scheme != "default")) {
 208             scheme = "default";
 209         }
 210         QFile script(":/styles/" + scheme + ".js");
 211         script.open(QFile::ReadOnly);
 212         QString scriptText = script.readAll();
 213         script.close();
 214         QVariant ret = frame->evaluateJavaScript(scriptText);
 215     }
 216 }
 217
 218 void BookView::paintEvent(QPaintEvent *e)
 219 {
 220     QWebView::paintEvent(e);
 221     if (!mBook || !loaded) {
 222         return;
 223     }
 224
 225     // Paint bookmarks
 226     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 227     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 228     QPainter painter(this);
 229     foreach (Book::Bookmark b, mBook->bookmarks()) {
 230         if (b.chapter != contentIndex) {
 231             continue;
 232         }
 233         int height = contentsHeight;
 234         int bookmarkPos = (qreal)height * (qreal)b.pos;
 235         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 236     }
 237 }
 238
 239 void BookView::mousePressEvent(QMouseEvent *e)
 240 {
 241     QWebView::mousePressEvent(e);
 242 #ifndef Q_WS_MAEMO_5
 243     QWebFrame *frame = page()->mainFrame();
 244     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 245         e->accept();
 246         return;
 247     }
 248 #endif // Q_WS_MAEMO_5
 249     e->ignore();
 250 }
 251
 252 void BookView::addBookmark()
 253 {
 254     Trace t("BookView::addBookmark");
 255     int y = page()->mainFrame()->scrollPosition().y();
 256     int height = page()->mainFrame()->contentsSize().height();
 257     t.trace(QString().setNum((qreal)y / (qreal)height));
 258     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 259     update();
 260 }
 261
 262 void BookView::addNavigationBar()
 263 {
 264     Trace t("BookView::addNavigationBar");
 265     if (!mBook) {
 266         return;
 267     }
 268
 269     QString naviPrev =
 270             "<a href=\"javascript:bv.goPrevious();\">"
 271             "<img width=\"95\" height=\"95\" style=\"float:left;clear:none;\" "
 272             "src=\"file://"
 273             + tmpPath() +
 274             "/previous.png\" />"
 275             "</a>";
 276     QString naviNext =
 277             "<a href=\"javascript:bv.goNext();\">"
 278             "<img width=\"95\" height=\"95\" style=\"float:right;clear:none;\" "
 279             "src=\"file://"
 280             + tmpPath() +
 281             "/next.png\" />"
 282             "</a>";
 283     if (contentIndex == 0) {
 284         naviPrev = "";
 285     }
 286     if (contentIndex >= mBook->toc.size() - 1) {
 287         naviNext = "";
 288     }
 289
 290     QWebFrame *frame = page()->currentFrame();
 291     QString headerScript = "document.body.innerHTML = '" +
 292         naviPrev + naviNext + "<br />" + "' + document.body.innerHTML;";
 293     QString trailerScript = "document.body.innerHTML += '<br /><br />" +
 294         naviPrev + naviNext + "';";
 295
 296     frame->evaluateJavaScript(headerScript);
 297     frame->evaluateJavaScript(trailerScript);
 298     decorated = true;
 299 }
 300
 301 QString BookView::tmpPath()
 302 {
 303     return QDir::tempPath() + "/dorian";
 304 }
 305
 306 void BookView::extractIcons()
 307 {
 308     QFile next(ICON_PREFIX + QString("/next.png"));
 309     QFile prev(ICON_PREFIX + QString("/previous.png"));
 310
 311     QDir().mkpath(tmpPath());
 312     next.copy(tmpPath() + "/next.png");
 313     prev.copy(tmpPath() + "/previous.png");
 314 }
 315
 316 void BookView::removeIcons()
 317 {
 318     QFile(ICON_PREFIX + QString("/next.png")).remove();
 319     QFile(ICON_PREFIX + QString("/previous.png")).remove();
 320     QDir().rmpath(tmpPath());
 321 }
 322
 323 bool BookView::eventFilter(QObject *o, QEvent *e)
 324 {
 325 #if 0
 326     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 327         if (e->type() == QEvent::Resize) {
 328             Trace::debug(QString("BookView::eventFilter QEvent::Resize to %1").
 329                          arg(page()->mainFrame()->contentsSize().height()));
 330         } else {
 331             Trace::debug(QString("BookView::eventFilter %1").
 332                          arg(Trace::event(e->type())));
 333         }
 334     }
 335 #endif
 336
 337     switch (e->type()) {
 338     case QEvent::MouseButtonPress:
 339         emit suppressedMouseButtonPress();
 340         mousePressed = true;
 341         break;
 342     case QEvent::MouseButtonRelease:
 343         mousePressed = false;
 344         break;
 345     case QEvent::MouseMove:
 346         if (mousePressed) {
 347             return true;
 348         }
 349         break;
 350     case QEvent::MouseButtonDblClick:
 351         return true;
 352     default:
 353         break;
 354     }
 355
 356     return QObject::eventFilter(o, e);
 357 }
 358
 359 void BookView::addJavaScriptObjects()
 360 {
 361     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 362 }
 363
 364 void BookView::onContentsSizeChanged(const QSize &size)
 365 {
 366     contentsHeight = size.height();
 367     if (decorated) {
 368         if (restorePositionAfterLoad) {
 369             Trace::debug("BookView::onContentSizeChanged: Time to restore");
 370             restorePositionAfterLoad = false;
 371             goToPosition(positionAfterLoad);
 372         }
 373     }
 374 }
 375
 376 void BookView::leaveEvent(QEvent *e)
 377 {
 378     Trace t("BookView::leaveEvent");
 379     // Save current position, to be restored later
 380     setLastBookmark();
 381     QWebView::leaveEvent(e);
 382 }
 383
 384 void BookView::enterEvent(QEvent *e)
 385 {
 386     Trace t("BookView::enterEvent");
 387     // Restore position saved at Leave event. This seems to be required,
 388     // after temporarily switching from portrait to landscape and back
 389     restoreLastBookmark();
 390     QWebView::enterEvent(e);
 391 }
 392
 393 void BookView::goToPosition(qreal position)
 394 {
 395     int scrollPos = (qreal)contentsHeight * position;
 396     page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 397     // FIXME: update();
 398     Trace::debug(QString("BookView::goToPosition: To %1 (%2%, height %3)").
 399             arg(scrollPos).arg(position * 100).arg(contentsHeight));
 400 }