git.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)
  23 {
  24     Trace t("BookView::BookView");
  25     settings()->setAttribute(QWebSettings::AutoLoadImages, true);
  26     settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
  27     settings()->setAttribute(QWebSettings::PluginsEnabled, false);
  28     settings()->setAttribute(QWebSettings::ZoomTextOnly, true);
  29     settings()->setAttribute(QWebSettings::LocalContentCanAccessRemoteUrls,
  30                              false);
  31     page()->setContentEditable(false);
  32
  33 #if defined(Q_WS_MAEMO_5)
  34     // Suppress unwanted text selections on Maemo
  35     installEventFilter(this);
  36 #endif
  37     QWebFrame *frame = page()->mainFrame();
  38 #if defined(Q_WS_MAEMO_5)
  39     frame->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
  40 #endif
  41     frame->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
  42
  43     bookmarkImage = QImage(":/icons/bookmark.png");
  44
  45     connect(this, SIGNAL(loadFinished(bool)), this, SLOT(onLoadFinished(bool)));
  46     connect(Settings::instance(), SIGNAL(valueChanged(const QString &)),
  47             this, SLOT(onSettingsChanged(const QString &)));
  48     Settings *s = Settings::instance();
  49     s->setValue("zoom", s->value("zoom", 160));
  50     s->setValue("font", s->value("font",
  51 #if defined(Q_WS_MAEMO_5) || defined(Q_WS_X11)
  52                                  "Serif"
  53 #elif defined(Q_WS_MAC)
  54                                  "Hoefler Text"
  55 #else
  56                                  "Times New Roman"
  57 #endif
  58                                  ));
  59     s->setValue("scheme", s->value("scheme", "default"));
  60     setBook(0);
  61
  62     extractIcons();
  63 }
  64
  65 BookView::~BookView()
  66 {
  67     Trace t("BookView::~BookView");
  68     removeIcons();
  69 }
  70
  71 void BookView::loadContent(int index)
  72 {
  73     Trace t("BookView::loadContent");
  74     if (!mBook) {
  75         return;
  76     }
  77     if ((index < 0) || (index >= mBook->toc.size())) {
  78         return;
  79     }
  80
  81     QString contentFile(mBook->content[mBook->toc[index]].href);
  82     if (mBook->toc[index] == "error") {
  83         setHtml(contentFile);
  84     }
  85     else {
  86         loaded = false;
  87         emit chapterLoadStart(index);
  88         load(QUrl(contentFile));
  89     }
  90     contentIndex = index;
  91 }
  92
  93 void BookView::setBook(Book *book)
  94 {
  95     Trace t("BookView::setBook");
  96     setLastBookmark();
  97     if (book != mBook) {
  98         mBook = book;
  99         if (book) {
 100             contentIndex = -1;
 101             book->open();
 102             goToBookmark(book->lastBookmark());
 103         }
 104         else {
 105             contentIndex = 0;
 106             setHtml(tr("No book"));
 107         }
 108     }
 109 }
 110
 111 Book *BookView::book()
 112 {
 113     return mBook;
 114 }
 115
 116 void BookView::goPrevious()
 117 {
 118     Trace t("BookView::goPrevious");
 119     loadContent(contentIndex - 1);
 120 }
 121
 122 void BookView::goNext()
 123 {
 124     Trace t("BookView::goNext");
 125     loadContent(contentIndex + 1);
 126 }
 127
 128 void BookView::setLastBookmark()
 129 {
 130     Trace t("BookView::saveLastBookmark");
 131     if (mBook) {
 132         int height = page()->mainFrame()->contentsSize().height();
 133         int pos = page()->mainFrame()->scrollPosition().y();
 134         mBook->setLastBookmark(contentIndex, (qreal)pos / (qreal)height);
 135     }
 136 }
 137
 138 void BookView::goToBookmark(const Book::Bookmark &bookmark)
 139 {
 140     Trace t("BookView::goToBookmark");
 141     if (mBook) {
 142         restore = true;
 143         positionAfterLoad = bookmark.pos;
 144         if (bookmark.chapter != contentIndex) {
 145             loadContent(bookmark.chapter);
 146         } else {
 147             onLoadFinished(true);
 148         }
 149     }
 150 }
 151
 152 void BookView::onLoadFinished(bool ok)
 153 {
 154     Trace t(QString("BookView::onLoadFinished: %1").arg(ok));
 155     loaded = true;
 156     if (ok) {
 157         addNavigationBar();
 158     }
 159     onSettingsChanged("scheme");
 160     emit chapterLoadEnd(contentIndex);
 161     if (restore) {
 162         restore = false;
 163         if (ok && mBook) {
 164             int height = page()->mainFrame()->contentsSize().height();
 165             int scrollPos = (qreal)height * positionAfterLoad;
 166             page()->mainFrame()->setScrollPosition(QPoint(0, scrollPos));
 167         }
 168     }
 169 }
 170
 171 void BookView::onSettingsChanged(const QString &key)
 172 {
 173     Trace t("BookView::onSettingsChanged " + key);
 174     if (key == "zoom") {
 175         setZoomFactor(Settings::instance()->value(key).toFloat() / 100.);
 176     }
 177     else if (key == "font") {
 178         QString face = Settings::instance()->value("font").toString();
 179         settings()->setFontFamily(QWebSettings::StandardFont, face);
 180     }
 181     else if (key == "scheme") {
 182         QWebFrame *frame = page()->mainFrame();
 183         QString scheme = Settings::instance()->value("scheme").toString();
 184         if ((scheme != "day") && (scheme != "night") && (scheme != "sand") &&
 185             (scheme != "default")) {
 186             scheme = "default";
 187         }
 188         QFile script(":/styles/" + scheme + ".js");
 189         script.open(QFile::ReadOnly);
 190         QString scriptText = script.readAll();
 191         script.close();
 192         QVariant ret = frame->evaluateJavaScript(scriptText);
 193     }
 194 }
 195
 196 void BookView::paintEvent(QPaintEvent *e)
 197 {
 198     QWebView::paintEvent(e);
 199     if (!mBook || !loaded) {
 200         return;
 201     }
 202
 203     // Paint bookmarks
 204     QPoint scrollPos = page()->mainFrame()->scrollPosition();
 205     QPixmap bookmarkPixmap = QPixmap::fromImage(bookmarkImage);
 206     QPainter painter(this);
 207     foreach (Book::Bookmark b, mBook->bookmarks()) {
 208         if (b.chapter != contentIndex) {
 209             continue;
 210         }
 211         int height = page()->mainFrame()->contentsSize().height();
 212         int bookmarkPos = (qreal)height * (qreal)b.pos;
 213         painter.drawPixmap(2, bookmarkPos - scrollPos.y(), bookmarkPixmap);
 214     }
 215 }
 216
 217 void BookView::mousePressEvent(QMouseEvent *e)
 218 {
 219     QWebView::mousePressEvent(e);
 220 #ifndef Q_WS_MAEMO_5
 221     QWebFrame *frame = page()->mainFrame();
 222     if (frame->scrollBarGeometry(Qt::Vertical).contains(e->pos())) {
 223         e->accept();
 224         return;
 225     }
 226 #endif // Q_WS_MAEMO_5
 227     e->ignore();
 228 }
 229
 230 void BookView::addBookmark()
 231 {
 232     Trace t("BookView::addBookmark");
 233     int y = page()->mainFrame()->scrollPosition().y();
 234     int height = page()->mainFrame()->contentsSize().height();
 235     t.trace(QString().setNum((qreal)y / (qreal)height));
 236     mBook->addBookmark(contentIndex, (qreal)y / (qreal)height);
 237     repaint();
 238 }
 239
 240 void BookView::addNavigationBar()
 241 {
 242     Trace t("BookView::addNavigationBar");
 243     if (!mBook) {
 244         return;
 245     }
 246
 247     QString naviPrev =
 248             "<a href=\"javascript:bv.goPrevious();\">"
 249             "<img width=\"95\" height=\"95\" style=\"float:left;clear:none;\" "
 250             "src=\"file://"
 251             + tmpPath() +
 252             "/previous.png\" />"
 253             "</a>";
 254     QString naviNext =
 255             "<a href=\"javascript:bv.goNext();\">"
 256             "<img width=\"95\" height=\"95\" style=\"float:right;clear:none;\" "
 257             "src=\"file://"
 258             + tmpPath() +
 259             "/next.png\" />"
 260             "</a>";
 261     if (contentIndex == 0) {
 262         naviPrev = "";
 263     }
 264     if (contentIndex >= mBook->toc.size() - 1) {
 265         naviNext = "";
 266     }
 267
 268     QWebFrame *frame = page()->currentFrame();
 269     frame->addToJavaScriptWindowObject("bv", this);
 270     QString headerScript = "document.body.innerHTML = '" +
 271         naviPrev + naviNext + "<br />" + "' + document.body.innerHTML;";
 272     QString trailerScript = "document.body.innerHTML += '<br /><br />" +
 273         naviPrev + naviNext + "';";
 274
 275     frame->evaluateJavaScript(headerScript);
 276     frame->evaluateJavaScript(trailerScript);
 277 }
 278
 279 QString BookView::tmpPath()
 280 {
 281     return QDir::tempPath() + "/dorian";
 282 }
 283
 284 void BookView::extractIcons()
 285 {
 286     QFile next(ICON_PREFIX + QString("/next.png"));
 287     QFile prev(ICON_PREFIX + QString("/previous.png"));
 288
 289     QDir().mkpath(tmpPath());
 290     next.copy(tmpPath() + "/next.png");
 291     prev.copy(tmpPath() + "/previous.png");
 292 }
 293
 294 void BookView::removeIcons()
 295 {
 296     QFile(ICON_PREFIX + QString("/next.png")).remove();
 297     QFile(ICON_PREFIX + QString("/previous.png")).remove();
 298     QDir().rmpath(tmpPath());
 299 }
 300
 301 bool BookView::eventFilter(QObject *, QEvent *e) {
 302     switch (e->type()) {
 303     case QEvent::MouseButtonPress:
 304         emit suppressedMouseButtonPress();
 305         mousePressed = true;
 306         break;
 307     case QEvent::MouseButtonRelease:
 308         mousePressed = false;
 309         break;
 310     case QEvent::MouseMove:
 311         if (mousePressed) {
 312             return true;
 313         }
 314         break;
 315     case QEvent::MouseButtonDblClick:
 316         return true;
 317     default:
 318         break;
 319     }
 320     return false;
 321 }