X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FBufferView.C;h=68a19e76b251f04324946ce3636f14c56c201d4e;hb=98c966c64594611e469313314abd1e59524adb4a;hp=abf7d708359deb401f3be99419a8654bc0ee8062;hpb=e5d7d21ed7a2be4dc01f23f96e67716d9b9ee11c;p=lyx.git

diff --git a/src/BufferView.C b/src/BufferView.C
index abf7d70835..68a19e76b2 100644
--- a/src/BufferView.C
+++ b/src/BufferView.C
@@ -1,1531 +1,288 @@
-// -*- C++ -*-
 /* This file is part of
- * ====================================================== 
- * 
+ * ======================================================
+ *
  *           LyX, The Document Processor
- *        
+ *
  *           Copyright 1995 Matthias Ettrich
- *           Copyright 1995-2000 The LyX Team.
+ *           Copyright 1995-2001 The LyX Team.
  *
  * ====================================================== */
 
 #include <config.h>
 
-#include <algorithm>
-using std::for_each;
-
-#include <cstdlib>
-#include <csignal>
-
-#include <unistd.h>
-#include <sys/wait.h>
-
-#include "support/lstrings.h"
-
 #ifdef __GNUG__
 #pragma implementation
 #endif
 
-#include "commandtags.h"
 #include "BufferView.h"
-#include "bufferlist.h"
-#include "LyXView.h"
-#include "lyxfunc.h"
-#include "insets/lyxinset.h"
-#include "insets/insetbib.h"
-#include "minibuffer.h"
-#include "lyxscreen.h"
-
-#include "debug.h"
-#include "lyx_gui_misc.h"
-#include "BackStack.h"
+#include "BufferView_pimpl.h"
 #include "lyxtext.h"
-#include "lyx_cb.h"
-#include "gettext.h"
-#include "layout.h"
-#include "TextCache.h"
-#include "intl.h"
-#include "lyxrc.h"
-#include "lyxrow.h"
-#include "WorkArea.h"
-
-using std::find_if;
-
-extern BufferList bufferlist;
-
-void sigchldhandler(pid_t pid, int * status);
+#include "lyxscreen.h"
 
-extern void SetXtermCursor(Window win);
-extern bool input_prohibited;
-extern bool selection_possible;
-extern char ascii_type;
-extern void MenuPasteSelection(char at);
-extern void FreeUpdateTimer();
 
 BufferView::BufferView(LyXView * o, int xpos, int ypos,
 		       int width, int height)
-	: owner_(o)
+	: pimpl_(new Pimpl(this, o, xpos, ypos, width, height))
 {
-	buffer_ = 0;
 	text = 0;
-	workarea = new WorkArea(this, xpos, ypos, width, height);
-	screen = 0;
-	timer_cursor = 0;
-	create_view();
-	current_scrollbar_value = 0;
-	// Activate the timer for the cursor 
-	fl_set_timer(timer_cursor, 0.4);
-	workarea->setFocus();
-	work_area_focus = true;
-	lyx_focus = false;
-	the_locking_inset = 0;
-	inset_slept = false;
 }
 
 
 BufferView::~BufferView()
 {
 	delete text;
+	delete pimpl_;
 }
 
 
-Painter & BufferView::painter() 
-{
-	return workarea->getPainter();
-}
-
-
-void BufferView::buffer(Buffer * b)
-{
-	lyxerr[Debug::INFO] << "Setting buffer in BufferView ("
-			    << b << ")" << endl;
-	if (buffer_) {
-		insetSleep();
-		buffer_->delUser(this);
-
-		// Put the old text into the TextCache, but
-		// only if the buffer is still loaded.
-		// Also set the owner of the test to 0
-		text->owner(0);
-		textcache.add(text);
-		if (lyxerr.debugging())
-			textcache.show(lyxerr, "BufferView::buffer");
-		
-		text = 0;
-	}
-
-	// Set current buffer
-	buffer_ = b;
-
-	if (bufferlist.getState() == BufferList::CLOSING) return;
-	
-	// Nuke old image
-	// screen is always deleted when the buffer is changed.
-	delete screen;
-	screen = 0;
-
-	// If we are closing the buffer, use the first buffer as current
-	if (!buffer_) {
-		buffer_ = bufferlist.first();
-	}
-
-	if (buffer_) {
-		lyxerr[Debug::INFO] << "Buffer addr: " << buffer_ << endl;
-		buffer_->addUser(this);
-		owner_->getMenus()->showMenus();
-		// If we don't have a text object for this, we make one
-		if (text == 0)
-			resizeCurrentBuffer();
-		else {
-			updateScreen();
-			updateScrollbar();
-		}
-		screen->first = screen->TopCursorVisible();
-		redraw();
-		updateAllVisibleBufferRelatedPopups();
-		insetWakeup();
-	} else {
-		lyxerr[Debug::INFO] << "  No Buffer!" << endl;
-		owner_->getMenus()->hideMenus();
-		updateScrollbar();
-		workarea->redraw();
-
-		// Also remove all remaining text's from the testcache.
-		// (there should not be any!) (if there is any it is a
-		// bug!)
-		if (lyxerr.debugging())
-			textcache.show(lyxerr, "buffer delete all");
-		textcache.clear();
-	}
-	// should update layoutchoice even if we don't have a buffer.
-	owner_->updateLayoutChoice();
-	owner_->getMiniBuffer()->Init();
-	owner_->updateWindowTitle();
-}
-
-
-void BufferView::updateScreen()
-{
-	// Regenerate the screen.
-	delete screen;
-	screen = new LyXScreen(*workarea, text);
-}
-
-
-void BufferView::resize(int xpos, int ypos, int width, int height)
-{
-	workarea->resize(xpos, ypos, width, height);
-	update(3);
-	redraw();
-}
-
-
-void BufferView::resize()
+Buffer * BufferView::buffer() const
 {
-	// This will resize the buffer. (Asger)
-	if (buffer_)
-		resizeCurrentBuffer();
+	return pimpl_->buffer_;
 }
 
 
-void BufferView::redraw()
+LyXScreen * BufferView::screen() const
 {
-	lyxerr[Debug::INFO] << "BufferView::redraw()" << endl;
-	workarea->redraw();
+	return pimpl_->screen_.get();
 }
 
 
-void BufferView::fitCursor()
+LyXView * BufferView::owner() const
 {
-	if (screen) screen->FitCursor();
-	updateScrollbar();
+	return pimpl_->owner_;
 }
 
 
-void BufferView::update()
+Painter & BufferView::painter()
 {
-	if (screen) screen->Update();
+	return pimpl_->painter();
 }
 
 
-void BufferView::updateScrollbar()
+void BufferView::buffer(Buffer * b)
 {
-	/* If the text is smaller than the working area, the scrollbar
-	 * maximum must be the working area height. No scrolling will 
-	 * be possible */
-
-	if (!buffer_) {
-		workarea->setScrollbar(0, 1.0);
-		return;
-	}
-	
-	static long max2 = 0;
-	static long height2 = 0;
-
-	long cbth = 0;
-	long cbsf = 0;
-
-	if (text)
-		cbth = text->height;
-	if (screen)
-		cbsf = screen->first;
-
-	// check if anything has changed.
-	if (max2 == cbth &&
-	    height2 == workarea->height() &&
-	    current_scrollbar_value == cbsf)
-		return; // no
-	max2 = cbth;
-	height2 = workarea->height();
-	current_scrollbar_value = cbsf;
-
-	if (cbth <= height2) { // text is smaller than screen
-		workarea->setScrollbar(0, 1.0); // right?
-		return;
-	}
-
-	long maximum_height = workarea->height() * 3 / 4 + cbth;
-	long value = cbsf;
-
-	// set the scrollbar
-	double hfloat = workarea->height();
-	double maxfloat = maximum_height;
-
-	float slider_size = 0.0;
-	int slider_value = value;
-
-	workarea->setScrollbarBounds(0, text->height - workarea->height());
-	double lineh = text->DefaultHeight();
-	workarea->setScrollbarIncrements(lineh);
-	if (maxfloat > 0.0) {
-		if ((hfloat / maxfloat) * float(height2) < 3)
-			slider_size = 3.0/float(height2);
-		else
-			slider_size = hfloat / maxfloat;
-	} else
-		slider_size = hfloat;
-
-	workarea->setScrollbar(slider_value, slider_size / workarea->height());
+	pimpl_->buffer(b);
 }
 
 
-void BufferView::redoCurrentBuffer()
+void BufferView::resize(int xpos, int ypos, int width, int height)
 {
-	lyxerr[Debug::INFO] << "BufferView::redoCurrentBuffer" << endl;
-	if (buffer_ && text) {
-		resize();
-		owner_->updateLayoutChoice();
-	}
+	pimpl_->resize(xpos, ypos, width, height);
 }
 
 
-int BufferView::resizeCurrentBuffer()
+void BufferView::resize()
 {
-	lyxerr[Debug::INFO] << "resizeCurrentBuffer" << endl;
-	
-	LyXParagraph * par = 0;
-	LyXParagraph * selstartpar = 0;
-	LyXParagraph * selendpar = 0;
-	int pos = 0;
-	int selstartpos = 0;
-	int selendpos = 0;
-	int selection = 0;
-	int mark_set = 0;
-
-	ProhibitInput();
-
-	owner_->getMiniBuffer()->Set(_("Formatting document..."));   
-
-	if (text) {
-		par = text->cursor.par;
-		pos = text->cursor.pos;
-		selstartpar = text->sel_start_cursor.par;
-		selstartpos = text->sel_start_cursor.pos;
-		selendpar = text->sel_end_cursor.par;
-		selendpos = text->sel_end_cursor.pos;
-		selection = text->selection;
-		mark_set = text->mark_set;
-		delete text;
-		text = new LyXText(this, workarea->workWidth(), buffer_);
-	} else {
-		// See if we have a text in TextCache that fits
-		// the new buffer_ with the correct width.
-		text = textcache.findFit(buffer_, workarea->workWidth());
-		if (text) {
-			if (lyxerr.debugging()) {
-				lyxerr << "Found a LyXText that fits:\n";
-				textcache.show(lyxerr, text);
-			}
-			// Set the owner of the newly found text
-			text->owner(this);
-			if (lyxerr.debugging())
-				textcache.show(lyxerr, "resizeCurrentBuffer");
-		} else {
-			text = new LyXText(this, workarea->workWidth(), buffer_);
-		}
-	}
-	updateScreen();
-
-	if (par) {
-		text->selection = true;
-		/* at this point just to avoid the Delete-Empty-Paragraph
-		 * Mechanism when setting the cursor */
-		text->mark_set = mark_set;
-		if (selection) {
-			text->SetCursor(selstartpar, selstartpos);
-			text->sel_cursor = text->cursor;
-			text->SetCursor(selendpar, selendpos);
-			text->SetSelection();
-			text->SetCursor(par, pos);
-		} else {
-			text->SetCursor(par, pos);
-			text->sel_cursor = text->cursor;
-			text->selection = false;
-		}
-	}
-	screen->first = screen->TopCursorVisible(); /* this will scroll the
-						     * screen such that the
-						     * cursor becomes
-						     * visible */ 
-	updateScrollbar();
-	redraw();
-	owner_->getMiniBuffer()->Init();
-	setState();
-	AllowInput();
-
-	// Now if the title form still exist kill it
-	TimerCB(0, 0);
-
-	return 0;
+	pimpl_->resize();
 }
 
 
-void BufferView::gotoError()
+void BufferView::redraw()
 {
-	if (!screen)
-		return;
-   
-	screen->HideCursor();
-	beforeChange();
-	update(-2);
-	LyXCursor tmp;
-
-	if (!text->GotoNextError()) {
-		if (text->cursor.pos 
-		    || text->cursor.par != text->FirstParagraph()) {
-			tmp = text->cursor;
-			text->cursor.par = text->FirstParagraph();
-			text->cursor.pos = 0;
-			if (!text->GotoNextError()) {
-				text->cursor = tmp;
-				owner_->getMiniBuffer()
-					->Set(_("No more errors"));
-				LyXBell();
-			}
-		} else {
-			owner_->getMiniBuffer()->Set(_("No more errors"));
-			LyXBell();
-		}
-	}
-	update(0);
-	text->sel_cursor = text->cursor;
+	pimpl_->redraw();
 }
 
 
-extern "C" {
-	void C_BufferView_CursorToggleCB(FL_OBJECT * ob, long buf)
-	{
-		BufferView::cursorToggleCB(ob, buf);
-	}
-}
-
-
-void BufferView::create_view()
+bool BufferView::fitCursor()
 {
-	FL_OBJECT * obj;
-
-	//
-	// TIMERS
-	//
-	
-	// timer_cursor
-	timer_cursor = obj = fl_add_timer(FL_HIDDEN_TIMER,
-					  0, 0, 0, 0, "Timer");
-	fl_set_object_callback(obj, C_BufferView_CursorToggleCB, 0);
-	obj->u_vdata = this;
+	return pimpl_->fitCursor();
 }
 
 
-// Callback for scrollbar up button
-void BufferView::upCB(long time, int button)
+void BufferView::update()
 {
-	if (buffer_ == 0) return;
-
-	switch (button) {
-	case 3:
-		scrollUpOnePage();
-		break;
-	case 2:
-		scrollDownOnePage();
-		break;
-	default:
-		scrollUp(time);
-		break;
-	}
+	pimpl_->update();
 }
 
 
-static inline
-void waitForX()
+void BufferView::updateScrollbar()
 {
-	XSync(fl_get_display(), 0);
+	pimpl_->updateScrollbar();
 }
 
 
-// Callback for scrollbar slider
 void BufferView::scrollCB(double value)
 {
-	extern bool cursor_follows_scrollbar;
-	
-	if (buffer_ == 0) return;
-
-	current_scrollbar_value = long(value);
-	if (current_scrollbar_value < 0)
-		current_scrollbar_value = 0;
-   
-	if (!screen)
-		return;
-
-	screen->Draw(current_scrollbar_value);
-
-	if (cursor_follows_scrollbar) {
-		LyXText * vbt = text;
-		int height = vbt->DefaultHeight();
-		
-		if (vbt->cursor.y < screen->first + height) {
-			vbt->SetCursorFromCoordinates(0,
-						      screen->first +
-						      height);
-		} else if (vbt->cursor.y >
-			   screen->first + workarea->height() - height) {
-			vbt->SetCursorFromCoordinates(0,
-						      screen->first +
-						      workarea->height()  -
-						      height);
-		}
-	}
-	waitForX();
+	pimpl_->scrollCB(value);
 }
 
 
-// Callback for scrollbar down button
-void BufferView::downCB(long time, int button)
+Inset * BufferView::checkInsetHit(LyXText * text, int & x, int & y)
 {
-	if (buffer_ == 0) return;
-	
-	switch (button) {
-	case 2:
-		scrollUpOnePage();
-		break;
-	case 3:
-		scrollDownOnePage();
-		break;
-	default:
-		scrollDown(time);
-		break;
-	}
+	return pimpl_->checkInsetHit(text, x, y);
 }
 
 
-int BufferView::scrollUp(long time)
-{
-	if (buffer_ == 0) return 0;
-	if (!screen) return 0;
-   
-	double value = workarea->getScrollbarValue();
-   
-	if (value == 0) return 0;
-
-	float add_value =  (text->DefaultHeight()
-			    + float(time) * float(time) * 0.125);
-   
-	if (add_value > workarea->height())
-		add_value = float(workarea->height() -
-				  text->DefaultHeight());
-   
-	value -= add_value;
-
-	if (value < 0)
-		value = 0;
-   
-	workarea->setScrollbarValue(value);
-   
-	scrollCB(value); 
-	return 0;
-}
-
-
-int BufferView::scrollDown(long time)
-{
-	if (buffer_ == 0) return 0;
-	if (!screen) return 0;
-   
-	double value= workarea->getScrollbarValue();
-	pair<double, double> p = workarea->getScrollbarBounds();
-	double max = p.second;
-	
-	if (value == max) return 0;
-
-	float add_value =  (text->DefaultHeight()
-			    + float(time) * float(time) * 0.125);
-   
-	if (add_value > workarea->height())
-		add_value = float(workarea->height() -
-				  text->DefaultHeight());
-   
-	value += add_value;
-   
-	if (value > max)
-		value = max;
-
-	workarea->setScrollbarValue(value);
-	
-	scrollCB(value); 
-	return 0;
-}
-
-
-void BufferView::scrollUpOnePage()
-{
-	if (buffer_ == 0) return;
-	if (!screen) return;
-   
-	long y = screen->first;
-
-	if (!y) return;
-
-	Row * row = text->GetRowNearY(y);
-
-	y = y - workarea->height() + row->height;
-
-	workarea->setScrollbarValue(y);
-	
-	scrollCB(y); 
-}
-
-
-void BufferView::scrollDownOnePage()
-{
-	if (buffer_ == 0) return;
-	if (!screen) return;
-   
-	long y = screen->first;
-
-	if (y > text->height - workarea->height())
-		return;
-   
-	y += workarea->height();
-	text->GetRowNearY(y);
-
-	workarea->setScrollbarValue(y);
-	
-	scrollCB(y); 
-}
-
-
-void BufferView::workAreaMotionNotify(int x, int y, unsigned int state)
-{
-	if (buffer_ == 0 || !screen) return;
-
-	// Check for inset locking
-	if (the_locking_inset) {
-		LyXCursor cursor = text->cursor;
-		the_locking_inset->
-			InsetMotionNotify(this,
-					  x - cursor.x,
-					  y - cursor.y,
-					  state);
-		return;
-	}
-
-	// Only use motion with button 1
-	if (!state & Button1MotionMask)
-		return; 
-   
-	/* The selection possible is needed, that only motion events are 
-	 * used, where the bottom press event was on the drawing area too */
-	if (selection_possible) {
-		screen->HideCursor();
-
-		text->SetCursorFromCoordinates(x, y + screen->first);
-      
-		if (!text->selection)
-			update(-3); // Maybe an empty line was deleted
-      
-		text->SetSelection();
-		screen->ToggleToggle();
-		if (screen->FitCursor())
-			updateScrollbar(); 
-		screen->ShowCursor();
-	}
-	return;
-}
-
-
-extern int bibitemMaxWidth(Painter &, LyXFont const &);
-
-
-// Single-click on work area
-void BufferView::workAreaButtonPress(int xpos, int ypos, unsigned int button)
-{
-	last_click_x = -1;
-	last_click_y = -1;
-
-	if (buffer_ == 0 || !screen) return;
-
-	Inset * inset_hit = checkInsetHit(xpos, ypos);
-
-	// ok ok, this is a hack.
-	if (button == 4 || button == 5) {
-		switch (button) {
-		case 4:
-			scrollUp(100); // This number is only temporary
-			break;
-		case 5:
-			scrollDown(100);
-			break;
-		}
-	}
-	
-	if (the_locking_inset) {
-		// We are in inset locking mode
-		
-		/* Check whether the inset was hit. If not reset mode,
-		   otherwise give the event to the inset */
-		if (inset_hit == the_locking_inset) {
-			the_locking_inset->
-				InsetButtonPress(this,
-						 xpos, ypos,
-						 button);
-			return;
-		} else {
-			unlockInset(the_locking_inset);
-		}
-	}
-	
-	if (!inset_hit)
-		selection_possible = true;
-	screen->HideCursor();
-	
-	// Right button mouse click on a table
-	if (button == 3 &&
-	    (text->cursor.par->table ||
-	     text->MouseHitInTable(xpos, ypos + screen->first))) {
-		// Set the cursor to the press-position
-		text->SetCursorFromCoordinates(xpos, ypos + screen->first);
-		bool doit = true;
-		
-		// Only show the table popup if the hit is in
-		// the table, too
-		if (!text->HitInTable(text->cursor.row, xpos))
-			doit = false;
-		
-		// Hit above or below the table?
-		if (doit) {
-			if (!text->selection) {
-				screen->ToggleSelection();
-				text->ClearSelection();
-				text->FullRebreak();
-				screen->Update();
-				updateScrollbar();
-			}
-			// Popup table popup when on a table.
-			// This is obviously temporary, since we
-			// should be able to popup various
-			// context-sensitive-menus with the
-			// the right mouse. So this should be done more
-			// general in the future. Matthias.
-			selection_possible = false;
-			owner_->getLyXFunc()
-				->Dispatch(LFUN_LAYOUT_TABLE,
-					   "true");
-			return;
-		}
-	}
-	
-	int screen_first = screen->first;
-	
-	// Middle button press pastes if we have a selection
-	bool paste_internally = false;
-	if (button == 2
-	    && text->selection) {
-		owner_->getLyXFunc()->Dispatch(LFUN_COPY);
-		paste_internally = true;
-	}
-	
-	// Clear the selection
-	screen->ToggleSelection();
-	text->ClearSelection();
-	text->FullRebreak();
-	screen->Update();
-	updateScrollbar();
-	
-	// Single left click in math inset?
-	if ((inset_hit != 0) &&
-	    (inset_hit->Editable()==Inset::HIGHLY_EDITABLE)) {
-		// Highly editable inset, like math
-		UpdatableInset *inset = (UpdatableInset *)inset_hit;
-		selection_possible = false;
-		owner_->updateLayoutChoice();
-		owner_->getMiniBuffer()->Set(inset->EditMessage());
-		inset->InsetButtonPress(this, xpos, ypos, button);
-		inset->Edit(this, xpos, ypos, button);
-		return;
-	} 
-	
-	// Right click on a footnote flag opens float menu
-	if (button == 3) { 
-		selection_possible = false;
-		return;
-	}
-	
-	text->SetCursorFromCoordinates(xpos, ypos + screen_first);
-	text->FinishUndo();
-	text->sel_cursor = text->cursor;
-	text->cursor.x_fix = text->cursor.x;
-	
-	owner_->updateLayoutChoice();
-	if (screen->FitCursor()){
-		updateScrollbar();
-		selection_possible = false;
-	}
-	
-	// Insert primary selection with middle mouse
-	// if there is a local selection in the current buffer,
-	// insert this
-	if (button == 2) {
-		if (paste_internally)
-			owner_->getLyXFunc()->Dispatch(LFUN_PASTE);
-		else
-			owner_->getLyXFunc()->Dispatch(LFUN_PASTESELECTION,
-						       "paragraph");
-		selection_possible = false;
-		return;
-	}
-}
-
-
-void BufferView::doubleClick(int /*x*/, int /*y*/, unsigned int button) 
+void BufferView::redoCurrentBuffer()
 {
-	// select a word
-	if (buffer_ && !the_locking_inset) {
-		if (screen && button == 1) {
-			screen->HideCursor();
-			screen->ToggleSelection();
-			text->SelectWord();
-			screen->ToggleSelection(false);
-			/* This will fit the cursor on the screen
-			 * if necessary */
-			update(0);
-		}
-	}            
+	pimpl_->redoCurrentBuffer();
 }
 
 
-void BufferView::tripleClick(int /*x*/, int /*y*/, unsigned int button)
+int BufferView::resizeCurrentBuffer()
 {
-	// select a line
-	if (buffer_ && screen && button == 1) {
-		screen->HideCursor();
-		screen->ToggleSelection();
-		text->CursorHome();
-		text->sel_cursor = text->cursor;
-		text->CursorEnd();
-		text->SetSelection();
-		screen->ToggleSelection(false);
-		/* This will fit the cursor on the screen
-		 * if necessary */
-		update(0);
-	}
+	return pimpl_->resizeCurrentBuffer();
 }
 
 
-void BufferView::workAreaButtonRelease(int x, int y, unsigned int button)
+void BufferView::cursorPrevious(LyXText * text)
 {
-	if (buffer_ == 0 || screen == 0) return;
-
-	// If we hit an inset, we have the inset coordinates in these
-	// and inset_hit points to the inset.  If we do not hit an
-	// inset, inset_hit is 0, and inset_x == x, inset_y == y.
-	Inset * inset_hit = checkInsetHit(x, y);
-
-	if (the_locking_inset) {
-		// We are in inset locking mode.
-
-		/* LyX does a kind of work-area grabbing for insets.
-		   Only a ButtonPress Event outside the inset will 
-		   force a InsetUnlock. */
-		the_locking_inset->
-			InsetButtonRelease(this, x, y, button);
-		return;
-	}
-	
-	selection_possible = false;
-        if (text->cursor.par->table) {
-                int cell = text->
-                        NumberOfCell(text->cursor.par,
-                                     text->cursor.pos);
-                if (text->cursor.par->table->IsContRow(cell) &&
-                    text->cursor.par->table->
-                    CellHasContRow(text->cursor.par->table->
-                                   GetCellAbove(cell))<0) {
-                        text->CursorUp();
-                }
-        }
-	
-	if (button >= 2) return;
-
-	setState();
-	owner_->getMiniBuffer()->Set(CurrentState());
-
-	// Did we hit an editable inset?
-	if (inset_hit != 0) {
-		// Inset like error, notes and figures
-		selection_possible = false;
-#ifdef WITH_WARNINGS
-#warning fix this proper in 0.13
-#endif
-		// Following a ref shouldn't issue
-		// a push on the undo-stack
-		// anylonger, now that we have
-		// keybindings for following
-		// references and returning from
-		// references.  IMHO though, it
-		// should be the inset's own business
-		// to push or not push on the undo
-		// stack. They don't *have* to
-		// alter the document...
-		// (Joacim)
-		// ...or maybe the SetCursorParUndo()
-		// below isn't necessary at all anylonger?
-		if (inset_hit->LyxCode() == Inset::REF_CODE) {
-			text->SetCursorParUndo();
-		}
-
-		owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
-		if (inset_hit->Editable()==Inset::HIGHLY_EDITABLE) {
-			// Highly editable inset, like math
-			UpdatableInset *inset = (UpdatableInset *)inset_hit;
-			inset->InsetButtonRelease(this, x, y, button);
-		} else {
-			inset_hit->Edit(this, x, y, button);
-		}
-		return;
-	}
-
-	// check whether we want to open a float
-	if (text) {
-		bool hit = false;
-		char c = ' ';
-		if (text->cursor.pos <
-		    text->cursor.par->Last()) {
-			c = text->cursor.par->
-				GetChar(text->cursor.pos);
-		}
-		if (c == LyXParagraph::META_FOOTNOTE
-		    || c == LyXParagraph::META_MARGIN
-		    || c == LyXParagraph::META_FIG
-		    || c == LyXParagraph::META_TAB
-		    || c == LyXParagraph::META_WIDE_FIG
-		    || c == LyXParagraph::META_WIDE_TAB
-                    || c == LyXParagraph::META_ALGORITHM){
-			hit = true;
-		} else if (text->cursor.pos - 1 >= 0) {
-			c = text->cursor.par->
-				GetChar(text->cursor.pos - 1);
-			if (c == LyXParagraph::META_FOOTNOTE
-			    || c == LyXParagraph::META_MARGIN
-			    || c == LyXParagraph::META_FIG
-			    || c == LyXParagraph::META_TAB
-			    || c == LyXParagraph::META_WIDE_FIG 
-			    || c == LyXParagraph::META_WIDE_TAB
-			    || c == LyXParagraph::META_ALGORITHM){
-				// We are one step too far to the right
-				text->CursorLeft();
-				hit = true;
-			}
-		}
-		if (hit == true) {
-			toggleFloat();
-			selection_possible = false;
-			return;
-		}
-	}
-
-	// Do we want to close a float? (click on the float-label)
-	if (text->cursor.row->par->footnoteflag == 
-	    LyXParagraph::OPEN_FOOTNOTE
-	    //&& text->cursor.pos == 0
-	    && text->cursor.row->previous &&
-	    text->cursor.row->previous->par->
-	    footnoteflag != LyXParagraph::OPEN_FOOTNOTE){
-		LyXFont font(LyXFont::ALL_SANE);
-		font.setSize(LyXFont::SIZE_FOOTNOTE);
-
-		int box_x = 20; // LYX_PAPER_MARGIN;
-		box_x += font.textWidth(" wide-tab ", 10);
-
-		int screen_first = screen->first;
-
-		if (x < box_x
-		    && y + screen_first > text->cursor.y -
-		    text->cursor.row->baseline
-		    && y + screen_first < text->cursor.y -
-		    text->cursor.row->baseline
-		    + font.maxAscent() * 1.2 + font.maxDescent() * 1.2) {
-			toggleFloat();
-			selection_possible = false;
-			return;
-		}
-	}
-
-	// Maybe we want to edit a bibitem ale970302
-	if (text->cursor.par->bibkey && x < 20 + 
-	    bibitemMaxWidth(painter(),
-			    textclasslist
-			    .TextClass(buffer_->
-				       params.textclass).defaultfont())) {
-		text->cursor.par->bibkey->Edit(this, 0, 0, 0);
-	}
-
-	return;
+	pimpl_->cursorPrevious(text);
 }
 
 
-/* 
- * Returns an inset if inset was hit. 0 otherwise.
- * If hit, the coordinates are changed relative to the inset. 
- * Otherwise coordinates are not changed, and false is returned.
- */
-Inset * BufferView::checkInsetHit(int & x, int & y)
-{
-	if (!screen)
-		return 0;
-  
-	int y_tmp = y + screen->first;
-  
-	LyXCursor & old_cursor = text->cursor;
-	text->SetCursorFromCoordinates(x,y);
-	LyXCursor & cursor = text->cursor;
-
-	bool is_rtl = text->real_current_font.isVisibleRightToLeft();
-
-	if (cursor.pos < cursor.par->Last()
-	    && cursor.par->GetChar(cursor.pos) == LyXParagraph::META_INSET
-	    && cursor.par->GetInset(cursor.pos)
-	    && cursor.par->GetInset(cursor.pos)->Editable()) {
-
-		// Check whether the inset really was hit
-		Inset * tmpinset = cursor.par->GetInset(cursor.pos);
-		LyXFont font = text->GetFont(cursor.par, cursor.pos);
-		int start_x, end_x;
-		if (is_rtl) {
-			start_x = cursor.x - tmpinset->width(painter(), font);
-			end_x = cursor.x;
-		} else {
-			start_x = cursor.x;
-			end_x = cursor.x + tmpinset->width(painter(), font);
-		}
-
-		if (x > start_x && x < end_x
-		    && y_tmp > cursor.y - tmpinset->ascent(painter(), font)
-		    && y_tmp < cursor.y + tmpinset->descent(painter(), font)) {
-			x = x - start_x;
-			// The origin of an inset is on the baseline
-			y = y_tmp - (cursor.y); 
-			return tmpinset;
-		}
-	}
-
-	if ((cursor.pos - 1 >= 0) &&
-	    (cursor.par->GetChar(cursor.pos-1) == LyXParagraph::META_INSET) &&
-	    (cursor.par->GetInset(cursor.pos - 1)) &&
-	    (cursor.par->GetInset(cursor.pos - 1)->Editable())) {
-		text->CursorLeft();
-		Inset * tmpinset = cursor.par->GetInset(cursor.pos);
-		LyXFont font = text->GetFont(cursor.par, cursor.pos);
-		int start_x, end_x;
-		if (is_rtl) {
-			start_x = cursor.x - tmpinset->width(painter(), font);
-			end_x = cursor.x;
-		} else {
-			start_x = cursor.x;
-			end_x = cursor.x + tmpinset->width(painter(), font);
-		}
-		if (x > start_x && x < end_x
-		    && y_tmp > cursor.y - tmpinset->ascent(painter(), font)
-		    && y_tmp < cursor.y + tmpinset->descent(painter(), font)) {
-			x = x - start_x;
-			// The origin of an inset is on the baseline
-			y = y_tmp - (cursor.y); 
-			return tmpinset;
-		} else {
-			text->CursorRight();
-		}
-	}
-	text->SetCursor(old_cursor.par, old_cursor.pos);
-	return 0;
-}
-
-void BufferView::workAreaExpose()
+void BufferView::cursorNext(LyXText * text)
 {
-	// this is a hack to ensure that we only call this through
-	// BufferView::redraw().
-	//if (!lgb_hack) {
-	//	redraw();
-	//}
-	
-	static int work_area_width = -1;
-	static int work_area_height = -1;
-
-	bool widthChange = workarea->workWidth() != work_area_width;
-	bool heightChange = workarea->height() != work_area_height;
-
-	// update from work area
-	work_area_width = workarea->workWidth();
-	work_area_height = workarea->height();
-	if (buffer_ != 0) {
-		if (widthChange) {
-			// All buffers need a resize
-			bufferlist.resize();
-
-			// Remove all texts from the textcache
-			// This is not _really_ what we want to do. What
-			// we really want to do is to delete in textcache
-			// that does not have a BufferView with matching
-			// width, but as long as we have only one BufferView
-			// deleting all gives the same result.
-			if (lyxerr.debugging())
-				textcache.show(lyxerr, "Expose delete all");
-			textcache.clear();
-		} else if (heightChange) {
-			// Rebuild image of current screen
-			updateScreen();
-			// fitCursor() ensures we don't jump back
-			// to the start of the document on vertical
-			// resize
-			fitCursor();
-
-			// The main window size has changed, repaint most stuff
-			redraw();
-			// ...including the minibuffer
-			owner_->getMiniBuffer()->Init();
-
-		} else if (screen) screen->Redraw();
-	} else {
-		// Grey box when we don't have a buffer
-		workarea->greyOut();
-	}
-
-	// always make sure that the scrollbar is sane.
-	updateScrollbar();
-	owner_->updateLayoutChoice();
-	return;
+	pimpl_->cursorNext(text);
 }
 
 
-// Callback for cursor timer
-void BufferView::cursorToggleCB(FL_OBJECT * ob, long)
+bool BufferView::available() const
 {
-	BufferView * view = static_cast<BufferView*>(ob->u_vdata);
-	
-	// Quite a nice place for asyncron Inset updating, isn't it?
-	// Actually no! This is run even if no buffer exist... so (Lgb)
-	if (view && !view->buffer_) {
-		goto set_timer_and_return;
-	}
-
-	// NOTE:
-	// On my quest to solve the gs render hangups I am now
-	// disabling the SIGHUP completely, and will do a wait
-	// now and then instead. If the guess that xforms somehow
-	// destroys something is true, this is likely (hopefully)
-	// to solve the problem...at least I hope so. Lgb
-
-	// ...Ok this seems to work...at least it does not make things
-	// worse so far. However I still see gs processes that hangs.
-	// I would really like to know _why_ they are hanging. Anyway
-	// the solution without the SIGCHLD handler seems to be easier
-	// to debug.
-
-	// When attaching gdb to a a running gs that hangs it shows
-	// that it is waiting for input(?) Is it possible for us to
-	// provide that input somehow? Or figure what it is expecing
-	// to read?
-
-	// One solution is to, after some time, look if there are some
-	// old gs processes still running and if there are: kill them
-	// and re render.
-
-	// Another solution is to provide the user an option to rerender
-	// a picture. This would, for the picture in question, check if
-	// there is a gs running for it, if so kill it, and start a new
-	// rendering process.
-
-	// these comments posted to lyx@via
-	{
-		int status = 1;
-		int pid = waitpid(static_cast<pid_t>(0), &status, WNOHANG);
-		if (pid == -1) // error find out what is wrong
-			; // ignore it for now.
-		else if (pid > 0)
-			sigchldhandler(pid, &status);
-	}
-
-	view->updatelist.update(view);
-	
-	if (view && !view->screen){
-		goto set_timer_and_return;
-	}
-
-	if (view->lyx_focus && view->work_area_focus) {
-		if (!view->the_locking_inset) {
-			view->screen->CursorToggle();
-		} else {
-			view->the_locking_inset->
-				ToggleInsetCursor(view);
-		}
-		goto set_timer_and_return;
-	} else {
-		// Make sure that the cursor is visible.
-		if (!view->the_locking_inset) {
-			view->screen->ShowCursor();
-		} else {
-			if (!view->the_locking_inset->isCursorVisible())
-				view->the_locking_inset->
-					ToggleInsetCursor(view);
-		}
-		// This is only run when work_area_focus or lyx_focus is false.
-		Window tmpwin;
-		int tmp;
-		XGetInputFocus(fl_display, &tmpwin, &tmp);
-		// Commenting this out, we have not had problems with this
-		// for a long time. We will probably work on this code later
-		// and we can reenable this debug code then. Now it only
-		// anoying when debugging. (Lgb)
-		//if (lyxerr.debugging(Debug::INFO)) {
-		//	lyxerr << "tmpwin: " << tmpwin
-		//	       << "\nwindow: " << view->owner_->getForm()->window
-		//	       << "\nwork_area_focus: " << view->work_area_focus
-		//	       << "\nlyx_focus      : " << view->lyx_focus
-		//	       << endl;
-		//}
-		if (tmpwin != view->owner_->getForm()->window) {
-			view->lyx_focus = false;
-			goto skip_timer;
-		} else {
-			view->lyx_focus = true;
-			if (!view->work_area_focus)
-				goto skip_timer;
-			else
-				goto set_timer_and_return;
-		}
-	}
-
-  set_timer_and_return:
-	fl_set_timer(ob, 0.4);
-  skip_timer:
-	return;
+	return pimpl_->available();
 }
 
 
-static
-string fromClipboard(Window win, XEvent * event)
+void BufferView::beforeChange(LyXText * text)
 {
-	string strret;
-	if (event->xselection.type == XA_STRING
-	    && event->xselection.property) {
-		Atom tmpatom;
-		unsigned long ul1;
-		unsigned long ul2;
-		unsigned char * uc = 0;
-		int tmpint;
-		if (XGetWindowProperty(
-			event->xselection.display,  // display
-			win,                        // w
-			event->xselection.property, // property
-			0,                          // long_offset	
-			0,                          // logn_length	
-			False,                      // delete	
-			XA_STRING,                  // req_type	
-			&tmpatom,                   // actual_type_return
-			&tmpint,                    // actual_format_return
-			&ul1,
-			&ul2,
-			&uc                         // prop_return	
-			) != Success) {
-			return strret;
-		}
-		if (uc) {
-			free(uc);
-			uc = 0;
-		}
-		if (XGetWindowProperty(
-			event->xselection.display,             // display
-			win,                        // w
-			event->xselection.property, // property
-			0,                          // long_offset
-			ul2/4+1,                    // long_length
-			True,                       // delete
-			XA_STRING,                  // req_type
-			&tmpatom,                   // actual_type_return
-			&tmpint,                    // actual_format_return
-			&ul1,                       // nitems_return
-			&ul2,                       // bytes_after_return
-			&uc                         // prop_return */
-			) != Success) {
-			return strret;
-		}
-		if (uc) {
-			strret = reinterpret_cast<char*>(uc);
-			free(uc); // yes free!
-			uc = 0;
-		}
-	}
-	return strret;
+	pimpl_->beforeChange(text);
 }
 
 
-void BufferView::workAreaSelectionNotify(Window win, XEvent * event)
+void BufferView::savePosition(unsigned int i)
 {
-	if (buffer_ == 0) return;
-
-	screen->HideCursor();
-	beforeChange();
-	string clb = fromClipboard(win, event);
-	if (!clb.empty()) {
-		if (!ascii_type)
-			text->InsertStringA(clb);
-		else
-			text->InsertStringB(clb);
-
-		update(1);
-		
-	}
+	pimpl_->savePosition(i);
 }
 
 
-void BufferView::cursorPrevious()
+void BufferView::restorePosition(unsigned int i)
 {
-	if (!text->cursor.row->previous) return;
-	
-	long y = screen->first;
-	Row * cursorrow = text->cursor.row;
-	text->SetCursorFromCoordinates(text->cursor.x_fix, y);
-	text->FinishUndo();
-	// This is to allow jumping over large insets
-	if ((cursorrow == text->cursor.row))
-		text->CursorUp();
-	
-  	if (text->cursor.row->height < workarea->height())
-		screen->Draw(text->cursor.y
-				  - text->cursor.row->baseline
-				  + text->cursor.row->height
-				  - workarea->height() + 1 );
+	pimpl_->restorePosition(i);
 }
 
 
-void BufferView::cursorNext()
+bool BufferView::isSavedPosition(unsigned int i)
 {
-	if (!text->cursor.row->next) return;
-	
-	long y = screen->first;
-	text->GetRowNearY(y);
-	Row * cursorrow = text->cursor.row;
-	text->SetCursorFromCoordinates(text->cursor.x_fix, y
-				       + workarea->height());
-	text->FinishUndo();
-	// This is to allow jumping over large insets
-	if ((cursorrow == text->cursor.row))
-		text->CursorDown();
-	
- 	if (text->cursor.row->height < workarea->height())
-		screen->Draw(text->cursor.y
-				  - text->cursor.row->baseline);
+	return pimpl_->isSavedPosition(i);
 }
 
 
-bool BufferView::available() const
+void BufferView::update(LyXText * text, UpdateCodes f)
 {
-	if (buffer_ && text) return true;
-	return false;
+	pimpl_->update(text, f);
 }
 
 
-void BufferView::beforeChange()
+void BufferView::setState()
 {
-	toggleSelection();
-	text->ClearSelection();
-	FreeUpdateTimer();
+	pimpl_->setState();
 }
 
 
-void BufferView::savePosition()
+void BufferView::insetSleep()
 {
-	backstack.push(buffer()->fileName(),
-		       text->cursor.x,
-		       text->cursor.y);
+	pimpl_->insetSleep();
 }
 
 
-void BufferView::restorePosition()
-{
-	if (backstack.empty()) return;
-	
-	int  x, y;
-	string fname = backstack.pop(&x, &y);
-	
-	beforeChange();
-	Buffer * b = bufferlist.exists(fname) ?
-		bufferlist.getBuffer(fname) :
-		bufferlist.loadLyXFile(fname); // don't ask, just load it
-	buffer(b);
-	text->SetCursorFromCoordinates(x, y);
-	update(0);
-} 
-
-
-void BufferView::update(signed char f)
+void BufferView::insetWakeup()
 {
-	owner()->updateLayoutChoice();
-
-	if (!text->selection && f > -3)
-		text->sel_cursor = text->cursor;
-	
-	FreeUpdateTimer();
-	text->FullRebreak();
-
-	update();
-
-	if (f != 3 && f != -3) {
-		fitCursor();
-		updateScrollbar();
-      	}
-
-	if (f == 1 || f == -1) {
-		if (buffer()->isLyxClean()) {
-			buffer()->markDirty();
-			owner()->getMiniBuffer()->setTimer(4);
-		} else {
-			buffer()->markDirty();
-		}
-	}
+	pimpl_->insetWakeup();
 }
 
 
-void BufferView::smallUpdate(signed char f)
+void BufferView::insetUnlock()
 {
-	screen->SmallUpdate();
-	if (screen->TopCursorVisible()
-	    != screen->first) {
-		update(f);
-		return;
-	}
-
-	fitCursor();
-	updateScrollbar();
-
-	if (!text->selection)
-		text->sel_cursor = text->cursor;
-
-	if (f == 1 || f == -1) {
-		if (buffer()->isLyxClean()) {
-			buffer()->markDirty();
-			owner()->getMiniBuffer()->setTimer(4);
-		} else {
-			buffer()->markDirty();
-		}
-	}
+	pimpl_->insetUnlock();
 }
 
 
-void BufferView::setState()
+bool BufferView::focus() const
 {
-	if (!lyxrc.rtl_support)
-		return;
-
-	if (text->real_current_font.isVisibleRightToLeft()) {
-		if (owner_->getIntl()->primarykeymap)
-			owner_->getIntl()->KeyMapSec();
-	} else {
-		if (!owner_->getIntl()->primarykeymap)
-			owner_->getIntl()->KeyMapPrim();
-	}
+	return pimpl_->focus();
 }
 
 
-void BufferView::insetSleep()
+void BufferView::focus(bool f)
 {
-	if (the_locking_inset && !inset_slept) {
-		the_locking_inset->GetCursorPos(slx, sly);
-		the_locking_inset->InsetUnlock(this);
-		inset_slept = true;
-	}
+	pimpl_->focus(f);
 }
 
 
-void BufferView::insetWakeup()
+bool BufferView::active() const
 {
-	if (the_locking_inset && inset_slept) {
-		the_locking_inset->Edit(this, slx, sly, 0);
-		inset_slept = false;
-	}
+	return pimpl_->active();
 }
 
 
-void BufferView::insetUnlock()
+int BufferView::workWidth() const
 {
-	if (the_locking_inset) {
-		if (!inset_slept) the_locking_inset->InsetUnlock(this);
-		the_locking_inset = 0;
-		text->FinishUndo();
-		inset_slept = false;
-	}
+    return pimpl_->workarea_.workWidth();
 }
 
 
-bool BufferView::focus() const
+bool BufferView::belowMouse() const
 {
-	return workarea->hasFocus();
+	return pimpl_->belowMouse();
 }
 
 
-void BufferView::focus(bool f)
+void BufferView::showCursor()
 {
-	if (f) workarea->setFocus();
+	pimpl_->showCursor();
 }
 
 
-bool BufferView::active() const
+void BufferView::hideCursor()
 {
-	return workarea->active();
+	pimpl_->hideCursor();
 }
 
 
-Painter & BufferView::getPainter() const
+void BufferView::toggleSelection(bool b)
 {
-    return workarea->getPainter();
+	pimpl_->toggleSelection(b);
 }
 
 
-unsigned short BufferView::paperWidth() const
+void BufferView::toggleToggle()
 {
-    return text->paperWidth();
+	pimpl_->toggleToggle();
 }
 
 
-bool BufferView::belowMouse() const 
+void BufferView::center()
 {
-	return workarea->belowMouse();
+	pimpl_->center();
 }
 
 
-void BufferView::showCursor()
+void BufferView::pasteClipboard(bool asPara)
 {
-	if (screen)
-		screen->ShowCursor();
+	pimpl_->pasteClipboard(asPara);
 }
 
 
-void BufferView::hideCursor()
+string const BufferView::getClipboard() const
 {
-	if (screen)
-		screen->HideCursor();
+	return pimpl_->workarea_.getClipboard();
 }
 
 
-void BufferView::toggleSelection(bool b)
+void BufferView::stuffClipboard(string const & stuff) const
 {
-	if (screen)
-		screen->ToggleSelection(b);
+	pimpl_->stuffClipboard(stuff);
 }
 
 
-void BufferView::toggleToggle()
+BufferView::UpdateCodes operator|(BufferView::UpdateCodes uc1,
+				  BufferView::UpdateCodes uc2)
 {
-	if (screen)
-		screen->ToggleToggle();
+	return static_cast<BufferView::UpdateCodes>
+		(static_cast<int>(uc1) | static_cast<int>(uc2));
 }
 
-
-void BufferView::center() 
+bool BufferView::Dispatch(kb_action action, string const & argument)
 {
-	beforeChange();
-	if (text->cursor.y > workarea->height() / 2) {
-		screen->Draw(text->cursor.y - workarea->height() / 2);
-	} else {
-		screen->Draw(0);
-	}
-	update(0);
-	redraw();
+	return pimpl_->Dispatch(action, argument);
 }