]> git.lyx.org Git - lyx.git/blobdiff - src/frontends/WorkArea.C
* src/frontends/qt4/GuiSelection.C
[lyx.git] / src / frontends / WorkArea.C
index cae78a718d8af72ef8654bddd9dc4512f34efa24..135dd2071e259a00b61bb15cdb64f244b4200935 100644 (file)
 /**
  * \file WorkArea.C
- * 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
+ * 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 "frontends/WorkArea.h"
+
+#include "frontends/Application.h"
+#include "frontends/FontMetrics.h"
+
+#include "funcrequest.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 "gettext.h"
+#include "support/forkedcontr.h"
+
+#include <boost/utility.hpp>
+#include <boost/bind.hpp>
+#include <boost/current_function.hpp>
+
+using lyx::support::ForkedcallsController;
+
+using std::endl;
+using std::min;
+using std::max;
+using std::string;
+
+
+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
+
+namespace lyx {
+namespace frontend {
+
+WorkArea::WorkArea(int id, LyXView & lyx_view)
+       : buffer_view_(0), lyx_view_(lyx_view), greyed_out_(true),
+         id_(id), cursor_visible_(false), cursor_timeout_(400)
+{
+       // Start loading the pixmap as soon as possible
+       //if (lyxrc.show_banner) {
+       //      showBanner();
+       //}
+
+       // 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();
+       }
+
+       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::stopBlinkingCursor()
+{
+       cursor_timeout_.stop();
+       hideCursor();
+}
+
+
+void WorkArea::startBlinkingCursor()
+{
+       showCursor();
+       cursor_timeout_.restart();
+}
+
+
+void WorkArea::redraw()
+{
+       if (!buffer_view_ || !buffer_view_->buffer()) {
+               greyed_out_ = true;
+               // The argument here are meaningless.
+               expose(1,1,1,1);
+               return;
+       }
+
+       // No need to do anything if this is the current view. The BufferView 
+       // metrics are already up to date.
+       if (&lyx_view_ != theApp()->currentView())
+               // FIXME: it would be nice to optimize for the off-screen case.
+               buffer_view_->updateMetrics(false);
+
+       updateScrollbar();
+
+       ViewMetricsInfo const & vi = buffer_view_->viewMetricsInfo();
+       greyed_out_ = false;
+
+       if (lyxerr.debugging(Debug::WORKAREA)) {
+               lyxerr[Debug::WORKAREA] << "WorkArea::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);
+
+       //lyxerr[Debug::WORKAREA]
+       //<< "  ymin = " << ymin << "  width() = " << width()
+//             << "  ymax-ymin = " << ymax-ymin << std::endl;
+
+       if (lyxerr.debugging(Debug::WORKAREA))
+               buffer_view_->coordCache().dump();
+}
+
+
+void WorkArea::processKeySym(LyXKeySymPtr key,
+                                                        key_modifier::state state)
+{
+       // In order to avoid bad surprise in the middle of an operation, we better stop
+       // the blinking cursor.
+       stopBlinkingCursor();
+
+       theLyXFunc().setLyXView(&lyx_view_);
+       theLyXFunc().processKeySym(key, state);
+
+       /* When we move around, or type, it's nice to be able to see
+        * the cursor immediately after the keypress.
+        */
+       startBlinkingCursor();
+}
+
+
+void WorkArea::dispatch(FuncRequest const & cmd0)
+{
+       // Handle drag&drop
+       if (cmd0.action == LFUN_FILE_OPEN) {
+               lyx_view_.dispatch(cmd0);
+               return;
+       }
+
+       theLyXFunc().setLyXView(&lyx_view_);
+
+       bool needRedraw = buffer_view_->workAreaDispatch(cmd0);
+
+       // Skip these when selecting
+       if (cmd0.action != LFUN_MOUSE_MOTION) {
+               lyx_view_.updateLayoutChoice();
+               lyx_view_.updateMenubar();
+               lyx_view_.updateToolbars();
+       }
+
+       
+       // GUI tweaks except with mouse motion with no button pressed.
+       if (!(cmd0.action == LFUN_MOUSE_MOTION 
+               && cmd0.button() == mouse_button::none)) {
+               // 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();
+
+               // Show the cursor immediately after any operation.
+               hideCursor();
+               toggleCursor();
+       }
+
+       if (needRedraw)
+               redraw();
+}
+
+
+void WorkArea::resizeBufferView()
+{
+       lyx_view_.busy(true);
+       lyx_view_.message(_("Formatting document..."));
+       buffer_view_->workAreaResize(width(), height());
+       lyx_view_.updateLayoutChoice();
+       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::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();
+       FontMetrics const & fm = theFontMetrics(font);
+       int const asc = fm.maxAscent();
+       int const des = fm.maxDescent();
+       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);
+}
 
-#include "WorkArea.h"
+} // namespace frontend
+} // namespace lyx