src/core/termview.cpp

/* -*- coding: utf-8; indent-tabs-mode: t; tab-width: 4; c-basic-offset: 4; -*- */
/**
 * Copyright (c) 2005 PCMan <pcman.tw@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifdef __GNUG__
  #pragma implementation "termview.h"
#endif


#include "termview.h"
#include "termdata.h"
#include "termsel.h"
#include "uao241.h"
#include "uao250.h"

#include <string>

#include <gdk/gdkx.h>
#include <pango/pangoxft.h>
#include "font.h"
#include "cfontconfig.h"

using namespace std;

static gboolean on_key_pressed(GtkWidget* wnd UNUSED, GdkEventKey *evt, CTermView* _this)
{
	bool ret = gtk_im_context_filter_keypress(_this->m_IMContext, evt );
	if( !_this->PreKeyDown(evt) && !ret )
		ret = _this->OnKeyDown(evt);
	return ret;
}

static void on_im_commit(GtkIMContext *im UNUSED, gchar *arg, CTermView* _this)
{
	_this->OnTextInput(arg);
}

static gboolean on_mouse_down(GtkWidget* widget UNUSED, GdkEventButton* evt, CTermView* _this)
{
	switch(evt->button)
	{
	case 1:
		_this->OnLButtonDown(evt);
		break;
	case 2:
		_this->OnMButtonDown(evt);
		break;
	case 3:
		_this->OnRButtonDown(evt);
	}
	return true;
}

static gboolean on_mouse_up(GtkWidget* widget UNUSED, GdkEventButton* evt, CTermView* _this)
{
	switch(evt->button)
	{
	case 1:
		_this->OnLButtonUp(evt);
		break;
	case 3:
		_this->OnRButtonUp(evt);
	}
	return true;
}

static gboolean on_mouse_move(GtkWidget* widget UNUSED, GdkEventMotion* evt, CTermView* _this)
{
	if (evt->is_hint)
	{
		int x, y;
		GdkModifierType state;
		gdk_window_get_pointer (evt->window, &x, &y, &state);
		evt->x = x;	evt->y = y;
		evt->state = state;
	}
	_this->OnMouseMove(evt);
	return true;
}

static gboolean on_mouse_scroll(GtkWidget* widget UNUSED, GdkEventScroll* evt, CTermView* _this)
{
	_this->OnMouseScroll(evt);
	return true;
}

void CTermView::OnBeforeDestroy( GtkWidget* widget UNUSED, CTermView* _this)
{
	XftDrawDestroy( _this->m_XftDraw);
	_this->m_XftDraw = NULL;
	DEBUG("unrealize, destroy XftDraw");
}

GdkCursor* CTermView::m_HandCursor = NULL;
GdkCursor* CTermView::m_ExitCursor = NULL;
GdkCursor* CTermView::m_BullsEyeCursor = NULL;
GdkCursor* CTermView::m_PageDownCursor = NULL;
GdkCursor* CTermView::m_PageUpCursor = NULL;
GdkCursor* CTermView::m_EndCursor = NULL;
GdkCursor* CTermView::m_HomeCursor = NULL;
int CTermView::m_CursorState = 0;

CTermView::CTermView()
        : CView(), m_pColorTable(CTermCharAttr::GetDefaultColorTable())
{
	m_pTermData = NULL;
	m_GC = NULL;
	m_ShowBlink = false;
	for (int i = FONT_START; i != FONT_END; ++i)
	    m_Font[i] = NULL;
	m_XftDraw = NULL;
	m_CharW = 18;
	m_CharH = 18;
	m_LeftMargin = 0;
	m_TopMargin = 0;
	m_bHorizontalCenterAlign = false;
	m_bVerticalCenterAlign = false;
	m_UAO = 0;

	m_CancelSel = false;

	gtk_widget_add_events(m_Widget, GDK_EXPOSURE_MASK
		 | GDK_KEY_PRESS_MASK
		 | GDK_BUTTON_PRESS_MASK
		 | GDK_BUTTON_MOTION_MASK
		 | GDK_BUTTON_RELEASE_MASK
		 | GDK_POINTER_MOTION_MASK
		 | GDK_POINTER_MOTION_HINT_MASK
		 | GDK_ALL_EVENTS_MASK);

	GTK_WIDGET_SET_FLAGS(m_Widget, GTK_CAN_FOCUS);
	gtk_widget_set_double_buffered(m_Widget, false);

	g_signal_connect(G_OBJECT(m_Widget), "unrealize", G_CALLBACK(CTermView::OnBeforeDestroy), this);

	g_signal_connect(G_OBJECT(m_Widget), "key_press_event", G_CALLBACK(on_key_pressed), this);

	g_signal_connect(G_OBJECT(m_Widget), "button_press_event", G_CALLBACK(on_mouse_down), this);

	g_signal_connect(G_OBJECT(m_Widget), "button_release_event", G_CALLBACK(on_mouse_up), this);

	g_signal_connect(G_OBJECT(m_Widget), "motion_notify_event", G_CALLBACK(on_mouse_move), this);

	g_signal_connect(G_OBJECT(m_Widget), "scroll_event", G_CALLBACK(on_mouse_scroll), this);

	m_CharPaddingX = m_CharPaddingY = 0;
	m_AutoFontSize = true;
	m_pHyperLinkColor = NULL;

	m_IMContext = gtk_im_multicontext_new();
	gtk_im_context_set_use_preedit( m_IMContext, FALSE );
	g_signal_connect( G_OBJECT(m_IMContext), "commit", G_CALLBACK(on_im_commit), this );

	if( m_HandCursor )
		gdk_cursor_ref(m_HandCursor);
	else
		m_HandCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_HAND2);
	if( m_ExitCursor )
	  gdk_cursor_ref(m_ExitCursor);
	else
	  m_ExitCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_SB_LEFT_ARROW);
	if( m_BullsEyeCursor )
	  gdk_cursor_ref(m_BullsEyeCursor);
	else
	  m_BullsEyeCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_SB_RIGHT_ARROW);
	if( m_PageUpCursor )
	  gdk_cursor_ref(m_PageUpCursor);
	else
	  m_PageUpCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_SB_UP_ARROW);
	if( m_PageDownCursor )
	  gdk_cursor_ref(m_PageDownCursor);
	else
	  m_PageDownCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_SB_DOWN_ARROW);
	if( m_EndCursor )
	  gdk_cursor_ref(m_EndCursor);
	else
	  m_EndCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_BOTTOM_SIDE);
	if( m_HomeCursor )
	  gdk_cursor_ref(m_HomeCursor);
	else
	  m_HomeCursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_TOP_SIDE);

}


void CTermView::OnPaint(GdkEventExpose* evt)
{
	// Hide the caret to prevent drawing problems.
	m_Caret.Hide();

	GdkDrawable* dc = m_Widget->window;
	if(!GDK_IS_DRAWABLE(dc))
	{
		DEBUG("WARNNING! Draw on DELETED widget!");
		return;
	}

	int w = m_Widget->allocation.width, h = m_Widget->allocation.height;

	if( m_pTermData )
	{
		// Only redraw the invalid area to greatly enhance performance.
		int top = evt->area.y;		int bottom = top + evt->area.height;
		int left = evt->area.x;		int right = left + evt->area.width;
		this->PointToLineCol( &left, &top );
		this->PointToLineCol( &right, &bottom );

		if(right < m_pTermData->m_ColsPerPage)	right++;
		if(bottom < m_pTermData->m_RowsPerPage)	bottom++;
		if(top > 0)	top-=top>1?2:1;

		for( int row = top; row < bottom; row++ )
		{
			for( int col = left; col < right; )
				col += DrawChar( row, col );
		}

		gdk_gc_set_rgb_fg_color(m_GC, CTermCharAttr::GetDefaultColorTable(0));
		left = m_pTermData->m_ColsPerPage*m_CharW-2;

		/* repaint some region that should be repainted */
		gdk_draw_rectangle(dc, m_GC, true, 0, 0, m_LeftMargin, h ); // fill left margin
		gdk_draw_rectangle(dc, m_GC, true, left + m_LeftMargin, 0, w-left, h ); // fill right marin

		top = m_pTermData->m_RowsPerPage*m_CharH;
		gdk_draw_rectangle(dc, m_GC, true, 0, 0, w, m_TopMargin ); // fill top margin
		gdk_draw_rectangle(dc, m_GC, true, 0, top + m_TopMargin, w, h - top ); // fill bottom margin

		m_Caret.Show();
	}
	else
	{
		gdk_gc_set_rgb_bg_color(m_GC, CTermCharAttr::GetDefaultColorTable(0));
		gdk_draw_rectangle(dc, m_GC, true, 0, 0, w, h );
	}

}

void CTermView::OnSetFocus(GdkEventFocus* evt UNUSED)
{
	gtk_im_context_focus_in(m_IMContext);
}


bool CTermView::OnKeyDown(GdkEventKey* evt UNUSED)
{
	return true;
}


void CTermView::OnTextInput(const gchar* string UNUSED)
{
    // Override this function to process text input.
}

void CTermView::OnCreate()
{
	CWidget::OnCreate();
	gtk_im_context_set_client_window(m_IMContext, m_Widget->window);

	m_XftDraw = XftDrawCreate(
		GDK_WINDOW_XDISPLAY(m_Widget->window),
		GDK_WINDOW_XWINDOW(m_Widget->window),
		GDK_VISUAL_XVISUAL(gdk_drawable_get_visual(m_Widget->window)),
		GDK_COLORMAP_XCOLORMAP (gdk_drawable_get_colormap(m_Widget->window)));
	XftDrawSetSubwindowMode(m_XftDraw, IncludeInferiors);


	for (int i = FONT_START; i != FONT_END; ++i) {
	    if (!m_Font[i])
		m_Font[i] = new CFont("WenQuanYi Micro Hei Mono", 16);
	}

	m_GC = gdk_gc_new(m_Widget->window);
	gdk_gc_copy(m_GC, m_Widget->style->black_gc);

	m_Caret.Create(this);
	m_Caret.Show();
}

bool CTermView::DrawSpaceFillingChar(const char* ch, int len UNUSED, int x, int y, GdkRectangle* clip UNUSED, GdkColor* clr UNUSED)
{
	GdkDrawable* dc = m_Widget->window;
	guchar* uchar = (guchar*)ch;
// NOTE: Omit this check to increase performance.
// IsSpaceFillingChar should be called prior to calling this method.
//	if( len >= 3 && (int)uchar[0] == 0xe2 )
	{
//		gdk_gc_set_rgb_fg_color( m_GC, clr );
		switch( uchar[1] )
		{
		case 0x96:
			if( uchar[2] >= 0x81 && uchar[2] <= 0x88 )
			{
				int h = m_CharH * (uchar[2] - 0x80) / 8;
				gdk_draw_rectangle( dc, m_GC, true, x , y + m_CharH - h, m_CharW * 2, h );
			}
			else if( uchar[2] >= 0x89 && uchar[2] <= 0x8f )
			{
				// FIXME: There are still some potential bugs here.
				// See the welcome screen of telnet://ptt.cc for example
				int w = m_CharW * 2 * (8 - (uchar[2] - 0x88)) / 8;
				gdk_draw_rectangle( dc, m_GC, true, x, y, w, m_CharH );
			}
/*
			else if( uchar[2] == 0xa0 )
			{
				gdk_draw_rectangle( dc, m_GC, true, rc->x, rc->y, m_CharW * 2, m_CharH );
			}
			else if( uchar[2] == 0xa1 )
			{
				int w = m_CharW * 2 * (uchar[2] - 0x88) / 8;
				gdk_draw_rectangle( dc, m_GC, false, rc->x, rc->y, w, m_CharH );
			}
*/			else
				return false;
			return true;
		case 0x95:
			return false;
		case 0x94:
			return false;
		case 0x97:
			{
				GdkTrapezoid tz;

				tz.y1 = y;
				tz.y2 = y + m_CharH;
				tz.x11 = tz.x12 = x;
				tz.x21 =	tz.x22 = x + m_CharW * 2;

				switch( uchar[2] )
				{
				case 0xa2:
					tz.x11 = tz.x21;
					break;
				case 0xa3:
					tz.x21 = tz.x11;
					break;
				case 0xa4:
					tz.x22 = tz.x12;
					break;
				case 0xa5:
					tz.x12 = tz.x22;
					break;
				default:
					return false;
				}

				gdk_draw_trapezoids( dc, m_GC, &tz, 1 );
				return true;
			}
		}
	}
	return false;
}

int CTermView::DrawChar(int row, int col)
{
	GdkDrawable* dc = m_Widget->window;
	if(!GDK_IS_DRAWABLE(dc) && m_XftDraw == NULL)
	{
//		g_warning("Draw on DELETED widget!\n");
		return 1;
	}

	const char* pLine = m_pTermData->m_Screen[m_pTermData->m_FirstLine + row];
	CTermCharAttr* pAttr = m_pTermData->GetLineAttr(pLine);
	int w = 2;
	bool is_mbcs2 = false;
	switch( pAttr[col].GetCharSet() )
	{
	case CTermCharAttr::CS_MBCS1:
		break;
	case CTermCharAttr::CS_MBCS2:
		col--;
		is_mbcs2 = true;
//		This will not cause any problem at any time because 'col' always > 0.
//		In CTermData_this->DetectCharSets() I've done some checks to ensure that the first
//		character of every lines cannot be marked as second bytes of MBCS characters.
		break;
	default:
//	case CTermCharAttr::CS_ASCII:
		w = 1;
	}
	pLine += col;
	pAttr += col;

	int loop_times = w;
	bool bSel[2];
	bSel[0] = m_pTermData->m_Sel->Has( row, col );
	if ( w > 1 )
	{
		bSel[1] = m_pTermData->m_Sel->Has( row, col + 1 );
		// two cells have the same attributes
		if(col < (m_pTermData->m_ColsPerPage - 1) &&
			pAttr[0] == pAttr[1] &&
			bSel[0] == bSel[1] )
			loop_times = 1;
	}

	int left = m_CharW * col + m_LeftMargin;
	int top = m_CharH * row + m_TopMargin;
	int bgw = m_CharW * w;

	GdkColor iFg, iBg;

	for( int i = 0; i < loop_times; i++ )	//	do the drawing
	{
		GdkColor* Fg = pAttr[i].GetFgColor( m_pColorTable );
		GdkColor* Bg = pAttr[i].GetBgColor( m_pColorTable );
		// if it's property is inverse, GetFgColor & GetBgColor will swap Bg & Fg for us.

		if( bSel[i] )	// if it's selected, reverse two colors.
		{
			iFg.red = ~Fg->red;
			iFg.green = ~Fg->green;
			iFg.blue = ~Fg->blue;
			Fg = &iFg;
			iBg.red = ~Bg->red;
			iBg.green = ~Bg->green;
			iBg.blue = ~Bg->blue;
			Bg = &iBg;
		}

		XftColor xftclr;
		xftclr.pixel = 0;
		xftclr.color.red = Fg->red;
		xftclr.color.green = Fg->green;
		xftclr.color.blue = Fg->blue;
		xftclr.color.alpha = 0xffff;

		// set clip mask
		GdkRectangle rect;
		XRectangle xrect;
		xrect.x = rect.x = left + m_CharW * i;
		xrect.y = rect.y = top;
		xrect.width = rect.width = m_CharW * ( w - i );
		xrect.height = rect.height = m_CharH;
		gdk_gc_set_clip_origin( m_GC, 0, 0 );
		gdk_gc_set_clip_rectangle( m_GC, &rect );
		Region xregion = XCreateRegion();
		XUnionRectWithRegion( &xrect, xregion, xregion );
		XftDrawSetClip( m_XftDraw, xregion );
		XDestroyRegion( xregion );

		gdk_gc_set_rgb_fg_color( m_GC, Bg );
		gdk_draw_rectangle( dc, m_GC, true, left , top, bgw, m_CharH );

		gdk_gc_set_rgb_fg_color( m_GC, Fg );

		if( !pAttr[i].IsBlink() || m_ShowBlink )	// If text should be drawn.
		{
			if( ' ' != *pLine && '\0' != *pLine )
			{
				gsize wl = 0;
				gchar* utf8 = NULL;

				/* UAO display support */
				switch (m_UAO) {
					case 2:
						utf8 = uao250_b2u(pLine, w, &wl);
						break;
					case 1:
						utf8 = uao241_b2u(pLine, w, &wl);
						break;
					default:
						utf8 = g_convert(pLine, w, "UTF-8", m_pTermData->m_Encoding.c_str(), NULL, &wl, NULL);
						break;
				}

				if (utf8 != NULL) {
					gunichar* ucs4 = NULL;
					XftFont* font = NULL;

					if (isascii (utf8[0])) {
						font = m_Font[FONT_EN]->GetXftFont();
					} else {
						font = m_Font[FONT_DEFAULT]->GetXftFont();
					}

					ucs4 = g_utf8_to_ucs4_fast(utf8, -1, NULL);

					if (ucs4 != NULL && XftCharExists(gdk_x11_get_default_xdisplay(), font, (FcChar32) *ucs4) == FcFalse) {
						XftFont* fallback = CFontConfig::Instance()->SearchFontFor((FcChar32) *ucs4);
						if (fallback != NULL) {
							XftDrawStringUtf8( m_XftDraw, &xftclr, fallback, left, top + fallback->ascent, (FcChar8*)utf8, wl );
						} else {
							XftDrawStringUtf8( m_XftDraw, &xftclr, font, left, top + font->ascent, (FcChar8*)utf8, wl );
						}
					} else if ( !IsSpaceFillingChar(utf8, wl) || !DrawSpaceFillingChar( utf8, wl, left, top, &rect, Fg ) ) {
						XftDrawStringUtf8( m_XftDraw, &xftclr, font, left, top + font->ascent, (FcChar8*)utf8, wl );
					}

					g_free(ucs4);
					g_free(utf8);
				}
			}
			if( pAttr[i].IsUnderLine() )
			{
				int y = top + m_CharH - 1;
				gdk_draw_line( dc, m_GC, left, y, left + bgw - 1, y );
			}
		}
		// 2004.08.07 Added by PCMan: Draw the underline of hyperlinks.
		if( pAttr[i].IsHyperLink() )
		{
//			dc.SetPen(wxPen(m_HyperLinkColor, 1, wxSOLID));
//			int bottom = top + m_CharH - 1;
//			dc.DrawLine(left, bottom, left+bgw, bottom);

			if(m_pHyperLinkColor)
	 			gdk_gc_set_rgb_fg_color( m_GC, m_pHyperLinkColor );
			int y = top + m_CharH - 1;
			gdk_draw_line( dc, m_GC, left, y, left + bgw - 1, y );
		}

	}
	gdk_gc_set_clip_rectangle( m_GC, NULL );
	XftDrawSetClip( m_XftDraw, NULL );

	return is_mbcs2 ? 1 : w;
}

void CTermView::PointToLineCol(int *x, int *y, bool *left)
{
	*x -= m_LeftMargin;

	int pos = *x % m_CharW;

	*x /= m_CharW;
	if (*x < 0)
	{
		*x = 0;
		pos = 0; // so that *left = true
	}
	else if( *x >= m_pTermData->m_ColsPerPage )
	{
		*x = m_pTermData->m_ColsPerPage - 1;
		pos = m_CharW; // so taht *left = false
	}

	*y -= m_TopMargin;
	*y /= m_CharH;
	if(*y <0 )
		*y = 0;
	else if( *y >= m_pTermData->m_RowsPerPage )
		*y = m_pTermData->m_RowsPerPage-1;

	if ( left )
	{
		const char* pLine = m_pTermData->m_Screen[m_pTermData->m_FirstLine + *y];
		CTermCharAttr* pAttr = m_pTermData->GetLineAttr( pLine );

		switch( pAttr[*x].GetCharSet() )
		{
		case CTermCharAttr::CS_MBCS1:
			*left = true;
			break;
		case CTermCharAttr::CS_MBCS2:
			*left = false;
			break;
		default:
			*left = pos < ( m_CharW + 1 ) / 2;
			break;
		}
	}
}

void CTermView::OnSize(GdkEventConfigure* evt UNUSED)
{
	if( !m_AutoFontSize || !m_pTermData )
		return;

	int w, h;
	GetCellSize( w, h );

	for (int i = FONT_START; i != FONT_END; ++i) {
	    m_Font[i]->SetFont( m_Font[i]->GetName(), w, h, m_Font[i]->GetCompact(), m_Font[i]->GetAntiAlias());
	}
	RecalcCharDimension();
}

static int DrawCharWrapper( int row, int col, void *data )
{
	CTermView *tv = (CTermView *) data;

	return tv->DrawChar( row, col );
}

void CTermView::ClearSelection()
{
	m_CancelSel = true;

	m_Caret.Hide();
	m_pTermData->m_Sel->Unselect( DrawCharWrapper, this );
	m_Caret.Show( false );
}

void CTermView::ExtendSelection( int row, int col, bool left UNUSED )
{
	row += m_pTermData->m_FirstLine;

	const char* pLine = m_pTermData->m_Screen[row];
	CTermCharAttr* pAttr = m_pTermData->GetLineAttr( pLine );

	if( pAttr[col].GetCharSet() == CTermCharAttr::CS_MBCS2 )
		col--;

	int klass = m_pTermData->GetCharClass( row, col );
	int i;

	/* decide start */
	for( i = col - 1; i >= 0; i-- )
	{
		int w = 1;
		if( pAttr[col].GetCharSet() == CTermCharAttr::CS_MBCS2 )
		{
			i--;
			w++;
		}

		if( m_pTermData->GetCharClass( row, i ) != klass )
		{
			i += w;
			break;
		}
	}
	if( i < 0 )
		i = 0;

	m_pTermData->m_Sel->NewStart( row, i, true );

	/* decide end */
	for( i = col + 1; i < m_pTermData->m_ColsPerPage; i++ )
	{
		int w = 1;
		if( pAttr[col].GetCharSet() == CTermCharAttr::CS_MBCS2 )
		{
			i++;
			w++;
		}

		if( m_pTermData->GetCharClass( row, i ) != klass )
		{
			i -= w;
			break;
		}
	}
	if( i >= m_pTermData->m_ColsPerPage )
		i = m_pTermData->m_ColsPerPage - 1;

	m_pTermData->m_Sel->ChangeEnd( row, i, false, DrawCharWrapper, this );
}

void CTermView::OnLButtonDown(GdkEventButton* evt)
{
	SetFocus();
	m_CancelSel = false;

	if( !m_pTermData )
		return;

	int x = (int)evt->x;
	int y = (int)evt->y;
	bool left;

	PointToLineCol( &x, &y, &left );

	if( evt->type == GDK_3BUTTON_PRESS )
	{
		m_pTermData->m_Sel->NewStart( y, 0, true );
		m_pTermData->m_Sel->ChangeEnd( y, m_pTermData->m_ColsPerPage - 1,
				               false, DrawCharWrapper, this );
	}
	else if( evt->type == GDK_2BUTTON_PRESS )
		ExtendSelection( y, x, left );
	else
	{
		// clear the old selection
		if( !m_pTermData->m_Sel->Empty() )
			ClearSelection();

		SetCapture();

		INFO("x=%d, y=%d, grab=%d", x, y, HasCapture());

		m_pTermData->m_Sel->NewStart( y, x, left,
				(evt->state & (GDK_SHIFT_MASK|GDK_MOD1_MASK|GDK_CONTROL_MASK)) );
	}
}


void CTermView::OnMouseMove(GdkEventMotion* evt UNUSED)
{

}


void CTermView::OnMouseScroll(GdkEventScroll* evt UNUSED)
{

}

void CTermView::OnRButtonDown(GdkEventButton* evt UNUSED)
{

}

void CTermView::OnLButtonUp(GdkEventButton* evt)
{
	if( !m_pTermData )
		return;
	ReleaseCapture();

	m_pTermData->m_Sel->Canonicalize();

	//	2004.08.07 Added by PCMan.  Hyperlink detection.
	//	If no text is selected, consider hyperlink.
	if( m_pTermData->m_Sel->Empty() )
	{
		int x = (int)evt->x;
		int y = (int)evt->y;
		PointToLineCol( &x, &y );

		int start, end;
		if( HyperLinkHitTest( x, y, &start, &end ) )
		{
			char* pline = m_pTermData->m_Screen[y];
			OnHyperlinkClicked( string( (pline+start), (int)(end-start) ) );
		}
	}
	else	// if there is a selected area
	{
		CopyToClipboard(true, false, false);
	}

}

void CTermView::OnRButtonUp(GdkEventButton* evt UNUSED)
{
}

void CTermView::OnKillFocus(GdkEventFocus *evt UNUSED)
{
	gtk_im_context_focus_out(m_IMContext);
}

// Preview the GdkEventKey before it's sent to OnKeyDown
// regardless of the returned value of im_context_filter_key_press.
bool CTermView::PreKeyDown(GdkEventKey *evt UNUSED)
{
	return false;
}

void CTermView::OnBlinkTimer()
{
	m_ShowBlink = !m_ShowBlink;
	if(m_pTermData)
	{
//		const int left = 0;	const int right = m_pTermData->m_ColsPerPage;
		for( int row = 0; row < m_pTermData->m_RowsPerPage; row++ )
		{
//			DrawLine( dc, i, y, true , left, right );
			CTermCharAttr* attr = m_pTermData->GetLineAttr(
					m_pTermData->m_Screen[m_pTermData->m_FirstLine + row] );

			for( int col = 0; col < m_pTermData->m_ColsPerPage; )
			{
				if( attr[col].IsBlink())
					col += DrawChar( row, col );
				else
					col++;
			}
		}
	}
	m_Caret.Blink();
}

void CTermView::OnMButtonDown(GdkEventButton* evt UNUSED)
{
	PasteFromClipboard(true);
}


string CTermView::m_s_ANSIColorStr;
string CTermView::m_s_CharSet;

void CTermView::PasteFromClipboard(bool primary)
{
	string text;
	if(m_s_ANSIColorStr.empty())
	{
		GtkClipboard* clipboard = gtk_clipboard_get( primary ? GDK_SELECTION_PRIMARY : GDK_NONE);
		INFO("paste");
		gchar* utext = gtk_clipboard_wait_for_text(clipboard);
		if( !utext )
			return;
		INFO("%s", utext);

		DoPasteFromClipboard( string(utext), false);
		g_free(utext);
	}
	else
		DoPasteFromClipboard(m_s_ANSIColorStr, true);
}

void CTermView::DoPasteFromClipboard(string text UNUSED, bool contain_ansi_color UNUSED)
{

}

void CTermView::CopyToClipboard(bool primary, bool with_color, bool trim)
{
	string text;
	if(!m_pTermData)
		return;
	m_s_ANSIColorStr = "";
	if( with_color ) {
		text = m_pTermData->GetSelectedTextWithColor(trim);
		m_s_ANSIColorStr = text;
		m_s_CharSet = m_pTermData->m_Encoding;
		INFO("copy(with color): %s", text.c_str());
	}
	else {
		text = m_pTermData->GetSelectedText(trim);
		gsize wl = 0;
		const gchar* utext = NULL;
		/* UAO copy support */
		switch (m_UAO) {
			case 2:
				utext = uao250_b2u(text.c_str(), text.length(), &wl);
				break;
			case 1:
				utext = uao241_b2u(text.c_str(), text.length(), &wl);
				break;
			default:
				utext = g_convert_with_fallback(
						text.c_str(), text.length(),
						"utf-8", m_pTermData->m_Encoding.c_str(),
						(gchar *) "?", NULL, &wl, NULL);
				break;
		}
		if(!utext)
			return;

		GtkClipboard* clipboard = gtk_clipboard_get(  primary ? GDK_SELECTION_PRIMARY : GDK_NONE );
		gtk_clipboard_set_text(clipboard, utext, wl );
		INFO("copy(without color): %s", utext);
		g_free((void*)utext);
	}
}

void CTermView::GetCellSize( int &w, int &h )
{
	if( !m_pTermData->m_ColsPerPage || !m_pTermData->m_RowsPerPage )
	{
		w = 0;
		h = 0;

		return;
	}

	w = ( m_Widget->allocation.width / m_pTermData->m_ColsPerPage ) - m_CharPaddingX;
	h = ( m_Widget->allocation.height / m_pTermData->m_RowsPerPage ) - m_CharPaddingY;
}

void CTermView::SetFont( CFont* font, int font_type )
{
	g_assert(font_type < FONT_END && font_type >= FONT_DEFAULT);

	if( !font || m_AutoFontSize)
		return;

	if( m_Font[font_type] )
		delete m_Font[font_type];

	if( m_AutoFontSize )
	{
		int w, h;
		GetCellSize( w, h );
		m_Font[font_type] = new CFont( font->GetName(), w, h, font->GetCompact(), font->GetAntiAlias() );
		delete font;
	}
	else
		m_Font[font_type] = font;

	RecalcCharDimension();
}

void CTermView::SetFont( string name, int pt_size, bool compact, bool anti_alias, int font_type)
{
	g_assert(font_type < FONT_END && font_type >= FONT_START);

	if( m_Font[font_type] )
		delete m_Font[font_type];

	if( m_AutoFontSize )
	{
		int w, h;
		GetCellSize( w, h );
		m_Font[font_type] = new CFont( name, w, h, compact, anti_alias );
	}
	else
		m_Font[font_type] = new CFont( name, pt_size, compact, anti_alias );

	RecalcCharDimension();
}

void CTermView::SetFontFamily( string name, int font_type )
{
	g_assert(font_type < FONT_END && font_type >= FONT_START);

	if( m_AutoFontSize )
	{
		int w, h;
		GetCellSize( w, h );
		m_Font[font_type]->SetFont( name, w, h, m_Font[font_type]->GetCompact(), m_Font[font_type]->GetAntiAlias() );
	}
	else
		m_Font[font_type]->SetFontFamily( name );

	RecalcCharDimension();
}

void CTermView::SetHorizontalCenterAlign( bool is_hcenter )
{
	if( m_bHorizontalCenterAlign == is_hcenter || !m_pTermData )
		return;

	if( (m_bHorizontalCenterAlign = is_hcenter) && GTK_WIDGET_REALIZED(m_Widget) )
		m_LeftMargin = (m_Widget->allocation.width - m_CharW * m_pTermData->m_ColsPerPage ) / 2 ;
	else
		m_LeftMargin = 0;

	if( IsVisible() )
		Refresh();
	UpdateCaretPos();
}

void CTermView::SetVerticalCenterAlign( bool is_vcenter )
{
	if( m_bVerticalCenterAlign == is_vcenter || !m_pTermData )
		return;

	if( (m_bVerticalCenterAlign = is_vcenter) && GTK_WIDGET_REALIZED(m_Widget) )
		m_TopMargin = (m_Widget->allocation.height - m_CharH * m_pTermData->m_RowsPerPage ) / 2 ;
	else
		m_TopMargin = 0;

	if( IsVisible() )
		Refresh();
	UpdateCaretPos();
}

void CTermView::SetUAO( gint idx )
{
	const char* encoding = m_pTermData->m_Encoding.c_str();
	if (strncasecmp (encoding, "BIG5", 4) == 0 ||
		strncasecmp (encoding, "BIG-5", 5) == 0) {
		m_UAO = idx;
	}
}

void CTermView::UpdateCaretPos()
{
	if( !m_pTermData )
		return;

	int x = m_pTermData->m_CaretPos.x * m_CharW + m_LeftMargin;
	int y = (m_pTermData->m_CaretPos.y + 1) * m_CharH - 2 + m_TopMargin;
	m_Caret.Move( x, y );

	GdkRectangle rc;
	rc.x = x;	rc.y = y; 	rc.width = 0;	rc.height = 0;
	gtk_im_context_set_cursor_location(m_IMContext, &rc);
}


bool CTermView::HyperLinkHitTest(int x, int y, int* start, int* end)
{
	char* pline = m_pTermData->m_Screen[y];
	CTermCharAttr* pattr = m_pTermData->GetLineAttr(pline);
	if( x > 0 && x < m_pTermData->m_ColsPerPage && pattr[x].IsHyperLink() )
	{
		int _start, _end;
		for( _start = (x - 1); _start > 0 &&
		                       pattr[_start].IsHyperLink(); _start-- )
			;
		if( !pattr[_start].IsHyperLink() )
			_start++;
		for( _end = (x + 1); _end < m_pTermData->m_ColsPerPage &&
		                     pattr[_end].IsHyperLink(); _end++ )
			;
		*start = _start;
		*end = _end;
		INFO("%d, %d : %d, %d", x, y, _start, _end);
		return true;
	}
	return false;
}


void CTermView::OnDestroy()
{
	for (int i = FONT_START; i != FONT_END; ++i)
	    delete m_Font[i];

	if( m_pTermData )
		m_pTermData->m_pView = NULL;

	if( m_HandCursor )
		gdk_cursor_unref(m_HandCursor);
	if( m_HandCursor->ref_count <= 0 )
		m_HandCursor = NULL;

	CView::OnDestroy();	// Remember to destruct parent
}

void CTermView::RecalcCharDimension()
{
	m_CharW = m_Font[FONT_DEFAULT]->GetWidth() + m_CharPaddingX;
	m_CharH = m_Font[FONT_DEFAULT]->GetHeight() + m_CharPaddingY;

	if( m_bHorizontalCenterAlign )
		m_LeftMargin = (m_Widget->allocation.width - m_CharW * m_pTermData->m_ColsPerPage ) / 2;
	else
		m_LeftMargin = 0;

	if( m_bVerticalCenterAlign )
		m_TopMargin = (m_Widget->allocation.height - m_CharH * m_pTermData->m_RowsPerPage ) / 2;
	else
		m_TopMargin = 0;

	m_Caret.SetSize(m_CharW, 2);
	UpdateCaretPos();
	m_Caret.Show();
}

void CTermView::OnHyperlinkClicked(string url UNUSED)	// Overriden in derived classes
{

}
/* vim: set fileencodings=utf-8 tabstop=4 noexpandtab shiftwidth=4 softtabstop=4: */