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    /* $OpenBSD: grid-view.c,v 1.30 2017/08/30 18:13:47 nicm Exp $ */  | 
    
    
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    /*  | 
    
    
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     * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>  | 
    
    
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     *  | 
    
    
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     * Permission to use, copy, modify, and distribute this software for any  | 
    
    
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     * purpose with or without fee is hereby granted, provided that the above  | 
    
    
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     * copyright notice and this permission notice appear in all copies.  | 
    
    
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     *  | 
    
    
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     * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES  | 
    
    
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     * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF  | 
    
    
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     * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  | 
    
    
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     * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES  | 
    
    
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     * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER  | 
    
    
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     * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING  | 
    
    
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     * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  | 
    
    
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     */  | 
    
    
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    #include <sys/types.h>  | 
    
    
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    #include <string.h>  | 
    
    
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    #include "tmux.h"  | 
    
    
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    /*  | 
    
    
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     * Grid view functions. These work using coordinates relative to the visible  | 
    
    
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     * screen area.  | 
    
    
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     */  | 
    
    
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    #define grid_view_x(gd, x) (x)  | 
    
    
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    #define grid_view_y(gd, y) ((gd)->hsize + (y))  | 
    
    
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    /* Get cell. */  | 
    
    
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    void  | 
    
    
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    grid_view_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc)  | 
    
    
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    { | 
    
    
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    	grid_get_cell(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc);  | 
    
    
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    }  | 
    
    
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    /* Set cell. */  | 
    
    
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    void  | 
    
    
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    grid_view_set_cell(struct grid *gd, u_int px, u_int py,  | 
    
    
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        const struct grid_cell *gc)  | 
    
    
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    { | 
    
    
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    	grid_set_cell(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc);  | 
    
    
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    }  | 
    
    
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    /* Set cells. */  | 
    
    
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    void  | 
    
    
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    grid_view_set_cells(struct grid *gd, u_int px, u_int py,  | 
    
    
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        const struct grid_cell *gc, const char *s, size_t slen)  | 
    
    
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    { | 
    
    
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    	grid_set_cells(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc, s,  | 
    
    
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    	    slen);  | 
    
    
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    }  | 
    
    
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    /* Clear into history. */  | 
    
    
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    void  | 
    
    
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    grid_view_clear_history(struct grid *gd, u_int bg)  | 
    
    
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    { | 
    
    
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    	struct grid_line	*gl;  | 
    
    
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    	u_int			 yy, last;  | 
    
    
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    	/* Find the last used line. */  | 
    
    
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    	last = 0;  | 
    
    
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    	for (yy = 0; yy < gd->sy; yy++) { | 
    
    
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    		gl = &gd->linedata[grid_view_y(gd, yy)];  | 
    
    
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    		if (gl->cellused != 0)  | 
    
    
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    			last = yy + 1;  | 
    
    
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    	}  | 
    
    
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    	if (last == 0) { | 
    
    
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    		grid_view_clear(gd, 0, 0, gd->sx, gd->sy, bg);  | 
    
    
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    		return;  | 
    
    
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    	}  | 
    
    
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    	/* Scroll the lines into the history. */  | 
    
    
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    	for (yy = 0; yy < last; yy++) { | 
    
    
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    		grid_collect_history(gd);  | 
    
    
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    		grid_scroll_history(gd, bg);  | 
    
    
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    	}  | 
    
    
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    	if (last < gd->sy)  | 
    
    
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    		grid_view_clear(gd, 0, 0, gd->sx, gd->sy - last, bg);  | 
    
    
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    	gd->hscrolled = 0;  | 
    
    
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    }  | 
    
    
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    /* Clear area. */  | 
    
    
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    void  | 
    
    
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    grid_view_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny,  | 
    
    
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        u_int bg)  | 
    
    
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    { | 
    
    
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    	px = grid_view_x(gd, px);  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	grid_clear(gd, px, py, nx, ny, bg);  | 
    
    
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    }  | 
    
    
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    /* Scroll region up. */  | 
    
    
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    void  | 
    
    
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    grid_view_scroll_region_up(struct grid *gd, u_int rupper, u_int rlower,  | 
    
    
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        u_int bg)  | 
    
    
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    { | 
    
    
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    	if (gd->flags & GRID_HISTORY) { | 
    
    
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    		grid_collect_history(gd);  | 
    
    
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    		if (rupper == 0 && rlower == gd->sy - 1)  | 
    
    
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    			grid_scroll_history(gd, bg);  | 
    
    
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    		else { | 
    
    
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    			rupper = grid_view_y(gd, rupper);  | 
    
    
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    			rlower = grid_view_y(gd, rlower);  | 
    
    
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    			grid_scroll_history_region(gd, rupper, rlower, bg);  | 
    
    
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    		}  | 
    
    
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    	} else { | 
    
    
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    		rupper = grid_view_y(gd, rupper);  | 
    
    
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    		rlower = grid_view_y(gd, rlower);  | 
    
    
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    		grid_move_lines(gd, rupper, rupper + 1, rlower - rupper, bg);  | 
    
    
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    	}  | 
    
    
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    }  | 
    
    
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    /* Scroll region down. */  | 
    
    
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    void  | 
    
    
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    grid_view_scroll_region_down(struct grid *gd, u_int rupper, u_int rlower,  | 
    
    
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        u_int bg)  | 
    
    
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    { | 
    
    
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    	rupper = grid_view_y(gd, rupper);  | 
    
    
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    	rlower = grid_view_y(gd, rlower);  | 
    
    
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    	grid_move_lines(gd, rupper + 1, rupper, rlower - rupper, bg);  | 
    
    
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    }  | 
    
    
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    /* Insert lines. */  | 
    
    
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    void  | 
    
    
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    grid_view_insert_lines(struct grid *gd, u_int py, u_int ny, u_int bg)  | 
    
    
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    { | 
    
    
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    	u_int	sy;  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	sy = grid_view_y(gd, gd->sy);  | 
    
    
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    	grid_move_lines(gd, py + ny, py, sy - py - ny, bg);  | 
    
    
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    }  | 
    
    
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    /* Insert lines in region. */  | 
    
    
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    void  | 
    
    
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    grid_view_insert_lines_region(struct grid *gd, u_int rlower, u_int py,  | 
    
    
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        u_int ny, u_int bg)  | 
    
    
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    { | 
    
    
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    	u_int	ny2;  | 
    
    
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    	rlower = grid_view_y(gd, rlower);  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	ny2 = rlower + 1 - py - ny;  | 
    
    
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    	grid_move_lines(gd, rlower + 1 - ny2, py, ny2, bg);  | 
    
    
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    	grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg);  | 
    
    
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    }  | 
    
    
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    /* Delete lines. */  | 
    
    
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    void  | 
    
    
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    grid_view_delete_lines(struct grid *gd, u_int py, u_int ny, u_int bg)  | 
    
    
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    { | 
    
    
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    	u_int	sy;  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	sy = grid_view_y(gd, gd->sy);  | 
    
    
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    	grid_move_lines(gd, py, py + ny, sy - py - ny, bg);  | 
    
    
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    	grid_clear(gd, 0, sy - ny, gd->sx, py + ny - (sy - ny), bg);  | 
    
    
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    }  | 
    
    
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    /* Delete lines inside scroll region. */  | 
    
    
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    void  | 
    
    
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    grid_view_delete_lines_region(struct grid *gd, u_int rlower, u_int py,  | 
    
    
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        u_int ny, u_int bg)  | 
    
    
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    { | 
    
    
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    	u_int	ny2;  | 
    
    
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    	rlower = grid_view_y(gd, rlower);  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	ny2 = rlower + 1 - py - ny;  | 
    
    
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    	grid_move_lines(gd, py, py + ny, ny2, bg);  | 
    
    
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    	grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg);  | 
    
    
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    }  | 
    
    
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    /* Insert characters. */  | 
    
    
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    void  | 
    
    
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    grid_view_insert_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg)  | 
    
    
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    { | 
    
    
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    	u_int	sx;  | 
    
    
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    	px = grid_view_x(gd, px);  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	sx = grid_view_x(gd, gd->sx);  | 
    
    
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    	if (px >= sx - 1)  | 
    
    
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    		grid_clear(gd, px, py, 1, 1, bg);  | 
    
    
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    	else  | 
    
    
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    		grid_move_cells(gd, px + nx, px, py, sx - px - nx, bg);  | 
    
    
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    }  | 
    
    
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    /* Delete characters. */  | 
    
    
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    void  | 
    
    
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    grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg)  | 
    
    
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    { | 
    
    
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    	u_int	sx;  | 
    
    
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    	px = grid_view_x(gd, px);  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	sx = grid_view_x(gd, gd->sx);  | 
    
    
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    	grid_move_cells(gd, px, px + nx, py, sx - px - nx, bg);  | 
    
    
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    	grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1, bg);  | 
    
    
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    }  | 
    
    
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    /* Convert cells into a string. */  | 
    
    
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    char *  | 
    
    
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    grid_view_string_cells(struct grid *gd, u_int px, u_int py, u_int nx)  | 
    
    
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    { | 
    
    
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    	px = grid_view_x(gd, px);  | 
    
    
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    	py = grid_view_y(gd, py);  | 
    
    
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    	return (grid_string_cells(gd, px, py, nx, NULL, 0, 0, 0));  | 
    
    
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    }  |