/**
* \file WorkArea.C
- * Copyright 2002 the LyX Team
- * Read the file COPYING
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
*
- * \author Asger and Juergen
+ * \author John Levon
+ * \author Abdelrazak Younes
+ *
+ * Full author contact details are available in file CREDITS.
+ *
+ * Splash screen code added by Angus Leeming
*/
#include <config.h>
-#ifdef __GNUG__
-#pragma implementation
-#endif
-
#include "WorkArea.h"
+
+#include "font_metrics.h"
+#include "funcrequest.h"
+#include "lyx_gui.h"
+#include "lyxfunc.h"
+#include "Painter.h"
+
+#include "BufferView.h"
+#include "buffer.h"
+#include "bufferparams.h"
+#include "coordcache.h"
+#include "cursor.h"
+#include "debug.h"
+#include "language.h"
+#include "LColor.h"
+#include "lyxfont.h"
+#include "lyxrc.h"
+#include "lyxrow.h"
+#include "lyxtext.h"
+#include "LyXView.h"
+#include "metricsinfo.h"
+#include "paragraph.h"
+#include "rowpainter.h"
+#include "version.h"
+
+#include "graphics/GraphicsImage.h"
+#include "graphics/GraphicsLoader.h"
+
+#include "gettext.h"
+#include "support/filetools.h" // LibFileSearch
+#include "support/forkedcontr.h"
+
+#include <boost/utility.hpp>
+#include <boost/bind.hpp>
+#include <boost/current_function.hpp>
+
+using lyx::support::libFileSearch;
+using lyx::support::ForkedcallsController;
+
+using std::endl;
+using std::min;
+using std::max;
+using std::string;
+
+
+namespace lyx {
+namespace frontend {
+
+// FIXME: The SplashScreen should be transfered to the
+// LyXView and create a WorkArea only when a new buffer exists. This
+// will allow to call WorkArea::redraw() in the constructor.
+class SplashScreen : boost::noncopyable, boost::signals::trackable {
+public:
+ /// This is a singleton class. Get the instance.
+ static SplashScreen const & get();
+ ///
+ lyx::graphics::Image const * image() const { return loader_.image(); }
+ ///
+ string const & text() const { return text_; }
+ ///
+ LyXFont const & font() const { return font_; }
+ ///
+ void connect(lyx::graphics::Loader::slot_type const & slot) const {
+ loader_.connect(slot);
+ }
+ ///
+ void startLoading() const {
+ if (loader_.status() == lyx::graphics::WaitingToLoad)
+ loader_.startLoading();
+ }
+
+private:
+ /** Make the c-tor private so we can control how many objects
+ * are instantiated.
+ */
+ SplashScreen();
+
+ ///
+ lyx::graphics::Loader loader_;
+ /// The text to be written on top of the pixmap
+ string const text_;
+ /// in this font...
+ LyXFont font_;
+};
+
+
+SplashScreen const & SplashScreen::get()
+{
+ static SplashScreen singleton;
+ return singleton;
+}
+
+
+SplashScreen::SplashScreen()
+ : text_(lyx_version ? lyx_version : "unknown")
+{
+ if (!lyxrc.show_banner)
+ return;
+
+ string const file = libFileSearch("images", "banner", "ppm");
+ if (file.empty())
+ return;
+
+ // The font used to display the version info
+ font_.setFamily(LyXFont::SANS_FAMILY);
+ font_.setSeries(LyXFont::BOLD_SERIES);
+ font_.setSize(LyXFont::SIZE_NORMAL);
+ font_.setColor(LColor::yellow);
+
+ // Load up the graphics file
+ loader_.reset(file);
+}
+
+namespace {
+
+// All the below connection objects are needed because of a bug in some
+// versions of GCC (<=2.96 are on the suspects list.) By having and assigning
+// to these connections we avoid a segfault upon startup, and also at exit.
+// (Lgb)
+
+boost::signals::connection timecon;
+
+} // anon namespace
+
+WorkArea::WorkArea(LyXView & lyx_view)
+ : buffer_view_(0), lyx_view_(lyx_view), greyed_out_(true),
+ cursor_visible_(false), cursor_timeout_(400)
+{
+ // Start loading the pixmap as soon as possible
+ if (lyxrc.show_banner) {
+ SplashScreen const & splash = SplashScreen::get();
+ splash.connect(boost::bind(&WorkArea::checkAndGreyOut, this));
+ splash.startLoading();
+ }
+
+ // Setup the signals
+ timecon = cursor_timeout_.timeout
+ .connect(boost::bind(&WorkArea::toggleCursor, this));
+
+ cursor_timeout_.start();
+}
+
+
+void WorkArea::setBufferView(BufferView * buffer_view)
+{
+ if (buffer_view_) {
+ message_connection_.disconnect();
+ lyx_view_.disconnectBufferView();
+ }
+
+ theApp->setBufferView(buffer_view);
+
+ hideCursor();
+ buffer_view_ = buffer_view;
+ toggleCursor();
+
+ message_connection_ = buffer_view_->message.connect(
+ boost::bind(&WorkArea::displayMessage, this, _1));
+
+ lyx_view_.connectBufferView(*buffer_view);
+}
+
+
+BufferView & WorkArea::bufferView()
+{
+ return *buffer_view_;
+}
+
+
+BufferView const & WorkArea::bufferView() const
+{
+ return *buffer_view_;
+}
+
+
+void WorkArea::checkAndGreyOut()
+{
+ if (greyed_out_)
+ greyOut();
+}
+
+
+void WorkArea::redraw()
+{
+ if (!buffer_view_)
+ return;
+
+ if (!buffer_view_->buffer()) {
+ greyOut();
+ updateScrollbar();
+ return;
+ }
+
+ buffer_view_->updateMetrics(false);
+
+ updateScrollbar();
+
+ ViewMetricsInfo const & vi = buffer_view_->viewMetricsInfo();
+ greyed_out_ = false;
+ getPainter().start();
+ paintText(*buffer_view_, vi, getPainter());
+ lyxerr[Debug::DEBUG] << "Redraw screen" << endl;
+ int const ymin = std::max(vi.y1, 0);
+ int const ymax =
+ ( vi.p2 < vi.size - 1 ? vi.y2 : height() );
+ expose(0, ymin, width(), ymax - ymin);
+ getPainter().end();
+
+ lyxerr[Debug::DEBUG]
+ << " ymin = " << ymin << " width() = " << width()
+ << " ymax-ymin = " << ymax-ymin << std::endl;
+}
+
+
+void WorkArea::processKeySym(LyXKeySymPtr key,
+ key_modifier::state state)
+{
+ hideCursor();
+ lyx_view_.getLyXFunc().processKeySym(key, state);
+
+ /* This is perhaps a bit of a hack. When we move
+ * around, or type, it's nice to be able to see
+ * the cursor immediately after the keypress. So
+ * we reset the toggle timeout and force the visibility
+ * of the cursor. Note we cannot do this inside
+ * dispatch() itself, because that's called recursively.
+ */
+// if (buffer_view_->buffer())
+ toggleCursor();
+
+ // uneeded "redraw()" call commented out for now.
+ // When/if the call to LyXView::redrawWorkArea() in "lyxfunc.C:1610"
+ // is not needed anymore, this line should be uncommented out
+ //redraw();
+}
+
+
+void WorkArea::dispatch(FuncRequest const & cmd0)
+{
+ // Handle drag&drop
+ if (cmd0.action == LFUN_FILE_OPEN) {
+ lyx_view_.dispatch(cmd0);
+ return;
+ }
+
+ buffer_view_->workAreaDispatch(cmd0);
+
+ // Skip these when selecting
+ if (cmd0.action != LFUN_MOUSE_MOTION) {
+ lyx_view_.updateLayoutChoice();
+ lyx_view_.updateMenubar();
+ lyx_view_.updateToolbars();
+ }
+
+ // Slight hack: this is only called currently when we
+ // clicked somewhere, so we force through the display
+ // of the new status here.
+ lyx_view_.clearMessage();
+
+ redraw();
+}
+
+
+void WorkArea::resizeBufferView()
+{
+ lyx_view_.busy(true);
+ lyx_view_.message(_("Formatting document..."));
+ buffer_view_->workAreaResize(width(), height());
+ lyx_view_.updateLayoutChoice();
+ redraw();
+ lyx_view_.busy(false);
+ lyx_view_.clearMessage();
+}
+
+
+void WorkArea::updateScrollbar()
+{
+ buffer_view_->updateScrollbar();
+ ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
+ setScrollbarParams(scroll_.height, scroll_.position,
+ scroll_.lineScrollHeight);
+}
+
+
+void WorkArea::scrollBufferView(int position)
+{
+ buffer_view_->scrollDocView(position);
+ redraw();
+ hideCursor();
+ if (lyxrc.cursor_follows_scrollbar) {
+ buffer_view_->setCursorFromScrollbar();
+ lyx_view_.updateLayoutChoice();
+ }
+ toggleCursor();
+}
+
+
+void WorkArea::greyOut()
+{
+ greyed_out_ = true;
+ getPainter().start();
+
+ getPainter().fillRectangle(0, 0,
+ width(),
+ height(),
+ LColor::bottomarea);
+
+ // Add a splash screen to the centre of the work area
+ SplashScreen const & splash = SplashScreen::get();
+ lyx::graphics::Image const * const splash_image = splash.image();
+ if (splash_image) {
+ int const w = splash_image->getWidth();
+ int const h = splash_image->getHeight();
+
+ int x = (width() - w) / 2;
+ int y = (height() - h) / 2;
+
+ getPainter().image(x, y, w, h, *splash_image);
+
+ x += 260;
+ y += 265;
+
+ string stext = splash.text();
+ docstring dstext(stext.begin(), stext.end());
+ getPainter().text(x, y, dstext, splash.font());
+ }
+ expose(0, 0, width(), height());
+ getPainter().end();
+}
+
+
+void WorkArea::showCursor()
+{
+ if (cursor_visible_)
+ return;
+
+ if (!buffer_view_->buffer())
+ return;
+
+ CursorShape shape = BAR_SHAPE;
+
+ LyXText const & text = *buffer_view_->getLyXText();
+ LyXFont const & realfont = text.real_current_font;
+ BufferParams const & bp = buffer_view_->buffer()->params();
+ bool const samelang = realfont.language() == bp.language;
+ bool const isrtl = realfont.isVisibleRightToLeft();
+
+ if (!samelang || isrtl != bp.language->rightToLeft()) {
+ shape = L_SHAPE;
+ if (isrtl)
+ shape = REVERSED_L_SHAPE;
+ }
+
+ // The ERT language hack needs fixing up
+ if (realfont.language() == latex_language)
+ shape = BAR_SHAPE;
+
+ LyXFont const font = buffer_view_->cursor().getFont();
+ int const asc = font_metrics::maxAscent(font);
+ int const des = font_metrics::maxDescent(font);
+ int h = asc + des;
+ int x = 0;
+ int y = 0;
+ buffer_view_->cursor().getPos(x, y);
+ y -= asc;
+
+ // if it doesn't touch the screen, don't try to show it
+ if (y + h < 0 || y >= height())
+ return;
+
+ cursor_visible_ = true;
+ showCursor(x, y, h, shape);
+}
+
+
+void WorkArea::hideCursor()
+{
+ if (!cursor_visible_)
+ return;
+
+ cursor_visible_ = false;
+ removeCursor();
+}
+
+
+void WorkArea::toggleCursor()
+{
+ if (buffer_view_->buffer()) {
+
+ if (cursor_visible_)
+ hideCursor();
+ else
+ showCursor();
+
+ // Use this opportunity to deal with any child processes that
+ // have finished but are waiting to communicate this fact
+ // to the rest of LyX.
+ ForkedcallsController & fcc = ForkedcallsController::get();
+ fcc.handleCompletedProcesses();
+ }
+
+ cursor_timeout_.restart();
+}
+
+
+void WorkArea::displayMessage(lyx::docstring const & message)
+{
+ lyx_view_.message(message);
+}
+
+} // namespace frontend
+} // namespace lyx
projects / lyx.git / blobdiff