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), restore(true),
  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     setLastBookmark();
 110     if (book != mBook) {
 111         mBook = book;
 112         if (book) {
 113             contentIndex = -1;
 114             book->open();
 115             goToBookmark(book->lastBookmark());
 116         }
 117         else {
 118             contentIndex = 0;
 119             setHtml(tr("No book"));
 120         }
 121     }
 122 }
 123
 124 Book *BookView::book()
 125 {
 126     return mBook;
 127 }
 128
 129 void BookView::goPrevious()
 130 {
 131     Trace t("BookView::goPrevious");
 132     loadContent(contentIndex - 1);
 133 }
 134
 135 void BookView::goNext()
 136 {
 137     Trace t("BookView::goNext");
 138     loadContent(contentIndex + 1);
 139 }
 140
 141 void BookView::setLastBookmark()
 142 {
 143     Trace t("BookView::saveLastBookmark");
 144     if (mBook) {
 145         int height = contentsHeight; // page()->mainFrame()->contentsSize().height();
 146         int pos = page()->mainFrame()->scrollPosition().y();
 147         t.trace(QString("At %1 (%2%, height %3)").
 148                 arg(pos).arg((qreal)pos / (qreal)height * 100).arg(height));
 149         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 150     }
 151 }
 152
 153 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 154 {
 155     Trace t("BookView::goToBookmark");
 156     if (mBook) {
 157         restore = true;
 158         positionAfterLoad = bookmark.pos;
 159         if (bookmark.chapter != contentIndex) {
 160             loadContent(bookmark.chapter);
 161         } else {
 162             onLoadFinished(true);
 163         }
 164     }
 165 }
 166
 167 void BookView::onLoadFinished(bool ok)
 168 {
 169     Trace t("BookView::onLoadFinished");
 170     if (!ok) {
 171         t.trace("Not OK");
 172         return;
 173     }
 174     loaded = true;
 175     addNavigationBar();
 176     onSettingsChanged("scheme");
 177     emit chapterLoadEnd(contentIndex);
 178 }
 179
 180 void BookView::onSettingsChanged(const QString &key)
 181 {
 182     Trace t("BookView::onSettingsChanged " + key);
 183     if (key == "zoom") {
 184         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 185     }
 186     else if (key == "font") {
 187         QString face = Settings::instance()->value("font").toString();
 188         settings()->setFontFamily(QWebSettings::StandardFont, face);
 189     }
 190     else if (key == "scheme") {
 191         QWebFrame *frame = page()->mainFrame();
 192         QString scheme = Settings::instance()->value("scheme").toString();
 193         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 194             (scheme != "default")) {
 195             scheme = "default";
 196         }
 197         QFile script(":/styles/" + scheme + ".js");
 198         script.open(QFile::ReadOnly);
 199         QString scriptText = script.readAll();
 200         script.close();
 201         QVariant ret = frame->evaluateJavaScript(scriptText);
 202     }
 203 }
 204
 205 void BookView::paintEvent(QPaintEvent *e)
 206 {
 207     QWebView::paintEvent(e);
 208     if (!mBook || !loaded) {
 209         return;
 210     }
 211
 212     // Paint bookmarks
 213     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 214     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 215     QPainter painter(this);
 216     foreach (Book::Bookmark b, mBook->bookmarks()) {
 217         if (b.chapter != contentIndex) {
 218             continue;
 219         }
 220         int height = contentsHeight; // page()->mainFrame()->contentsSize().height();
 221         int bookmarkPos = (qreal)height * (qreal)b.pos;
 222         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 223     }
 224 }
 225
 226 void BookView::mousePressEvent(QMouseEvent *e)
 227 {
 228     QWebView::mousePressEvent(e);
 229 #ifndef Q_WS_MAEMO_5
 230     QWebFrame *frame = page()->mainFrame();
 231     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 232         e->accept();
 233         return;
 234     }
 235 #endif // Q_WS_MAEMO_5
 236     e->ignore();
 237 }
 238
 239 void BookView::addBookmark()
 240 {
 241     Trace t("BookView::addBookmark");
 242     int y = page()->mainFrame()->scrollPosition().y();
 243     int height = page()->mainFrame()->contentsSize().height();
 244     t.trace(QString().setNum((qreal)y / (qreal)height));
 245     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 246     update();
 247 }
 248
 249 void BookView::addNavigationBar()
 250 {
 251     Trace t("BookView::addNavigationBar");
 252     if (!mBook) {
 253         return;
 254     }
 255
 256     QString naviPrev =
 257             "<a href=\"javascript:bv.goPrevious();\">"
 258             "<img width=\"95\" height=\"95\" style=\"float:left;clear:none;\" "
 259             "src=\"file://"
 260             + tmpPath() +
 261             "/previous.png\" />"
 262             "</a>";
 263     QString naviNext =
 264             "<a href=\"javascript:bv.goNext();\">"
 265             "<img width=\"95\" height=\"95\" style=\"float:right;clear:none;\" "
 266             "src=\"file://"
 267             + tmpPath() +
 268             "/next.png\" />"
 269             "</a>";
 270     if (contentIndex == 0) {
 271         naviPrev = "";
 272     }
 273     if (contentIndex >= mBook->toc.size() - 1) {
 274         naviNext = "";
 275     }
 276
 277     QWebFrame *frame = page()->currentFrame();
 278     QString headerScript = "document.body.innerHTML = '" +
 279         naviPrev + naviNext + "<br />" + "' + document.body.innerHTML;";
 280     QString trailerScript = "document.body.innerHTML += '<br /><br />" +
 281         naviPrev + naviNext + "';";
 282
 283     frame->evaluateJavaScript(headerScript);
 284     frame->evaluateJavaScript(trailerScript);
 285     decorated = true;
 286 }
 287
 288 QString BookView::tmpPath()
 289 {
 290     return QDir::tempPath() + "/dorian";
 291 }
 292
 293 void BookView::extractIcons()
 294 {
 295     QFile next(ICON_PREFIX + QString("/next.png"));
 296     QFile prev(ICON_PREFIX + QString("/previous.png"));
 297
 298     QDir().mkpath(tmpPath());
 299     next.copy(tmpPath() + "/next.png");
 300     prev.copy(tmpPath() + "/previous.png");
 301 }
 302
 303 void BookView::removeIcons()
 304 {
 305     QFile(ICON_PREFIX + QString("/next.png")).remove();
 306     QFile(ICON_PREFIX + QString("/previous.png")).remove();
 307     QDir().rmpath(tmpPath());
 308 }
 309
 310 bool BookView::eventFilter(QObject *, QEvent *e)
 311 {
 312     if (e->type() != QEvent::Paint && e->type() != QEvent::MouseMove) {
 313         Trace::debug(QString("BookView::eventFilter %1").
 314                      arg(Trace::event(e->type())));
 315     }
 316     switch (e->type()) {
 317     case QEvent::MouseButtonPress:
 318         emit suppressedMouseButtonPress();
 319         mousePressed = true;
 320         break;
 321     case QEvent::MouseButtonRelease:
 322         mousePressed = false;
 323         break;
 324     case QEvent::MouseMove:
 325         if (mousePressed) {
 326             return true;
 327         }
 328         break;
 329     case QEvent::MouseButtonDblClick:
 330         return true;
 331     default:
 332         break;
 333     }
 334     return false;
 335 }
 336
 337 void BookView::addJavaScriptObjects()
 338 {
 339     page()->mainFrame()->addToJavaScriptWindowObject("bv", this);
 340 }
 341
 342 void BookView::onContentsSizeChanged(const QSize &size)
 343 {
 344     Trace t("BookView::onContentsSizeChanged");
 345     t.trace(QString("To %1").arg(size.height()));
 346     contentsHeight = size.height();
 347     if (decorated) {
 348         decorated = false;
 349         if (restore) {
 350             restore = false;
 351             if (mBook) {
 352                 QWebPage *webPage = page();
 353                 QWebFrame *mainFrame = webPage->mainFrame();
 354                 int height = contentsHeight;
 355                 int scrollPos = (qreal)height * positionAfterLoad;
 356                 mainFrame->setScrollPosition(QPoint(0, scrollPos));
 357                 t.trace(QString("Restoring positon to %1 (%2%, height %3)").
 358                         arg(scrollPos).arg(positionAfterLoad * 100).arg(height));
 359                 foreach (QString key, mainFrame->metaData().keys()) {
 360                     QString value = mainFrame->metaData().value(key);
 361                     t.trace(key + ": " + value);
 362                 }
 363             }
 364         }
 365     }
 366 }