[thirdparty/newt.git] / textbox.c


#include <ctype.h>
#include <slang.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>

#include "newt.h"
#include "newt_pr.h"

struct textbox {
    char ** lines;
    int numLines;
    char *blankline;
    int linesAlloced;
    int doWrap;
    newtComponent sb_act, sb;
    int topLine;
    int textWidth;
    int isActive;
};

static char * expandTabs(const char * text);
static void textboxDraw(newtComponent co);
static void addLine(newtComponent co, const char * s, int len);
static void doReflow(const char * text, char ** resultPtr, int width, 
		     int * badness, int * heightPtr);
static struct eventResult textboxEvent(newtComponent c,
				      struct event ev);
static void textboxDestroy(newtComponent co);
static void textboxPlace(newtComponent co, int newLeft, int newTop);
static void textboxMapped(newtComponent co, int isMapped);

static struct componentOps textboxOps = {
    textboxDraw,
    textboxEvent,
    textboxDestroy,
    textboxPlace,
    textboxMapped,
} ;

static void textboxMapped(newtComponent co, int isMapped) {
    struct textbox * tb = co->data;

    co->isMapped = isMapped;
    if (tb->sb) {
	tb->sb->ops->mapped(tb->sb, isMapped);
	tb->sb_act->ops->mapped(tb->sb_act, isMapped);
    }
}

static void textboxPlace(newtComponent co, int newLeft, int newTop) {
    struct textbox * tb = co->data;

    co->top = newTop;
    co->left = newLeft;

    if (tb->sb) {
	tb->sb->ops->place(tb->sb, co->left + co->width - 1, co->top);
	tb->sb_act->ops->place(tb->sb_act, co->left + co->width - 1, co->top);
    }
}

void newtTextboxSetHeight(newtComponent co, int height) {
    co->height = height;
}

int newtTextboxGetNumLines(newtComponent co) {
    struct textbox * tb = co->data;

    return (tb->numLines);
}

newtComponent newtTextboxReflowed(int left, int top, char * text, int width,
				  int flexDown, int flexUp, int flags) {
    newtComponent co;
    char * reflowedText;
    int actWidth, actHeight;

    reflowedText = newtReflowText(text, width, flexDown, flexUp,
				  &actWidth, &actHeight);
    
    co = newtTextbox(left, top, actWidth, actHeight, NEWT_FLAG_WRAP);
    newtTextboxSetText(co, reflowedText);
    free(reflowedText);

    return co;
}

newtComponent newtTextbox(int left, int top, int width, int height, int flags) {
    newtComponent co;
    struct textbox * tb;

    co = malloc(sizeof(*co));
    tb = malloc(sizeof(*tb));
    co->data = tb;

    if (width < 2) width = 2;

    co->ops = &textboxOps;

    co->isMapped = 0;
    co->height = height;
    co->top = top;
    co->left = left;
    co->takesFocus = 0;
    co->width = width;
    co->destroyCallback = NULL;

    tb->doWrap = flags & NEWT_FLAG_WRAP;
    tb->numLines = 0;
    tb->linesAlloced = 0;
    tb->lines = NULL;
    tb->topLine = 0;
    tb->textWidth = width;
    tb->isActive = 0;
    tb->blankline = malloc(width+1);
    memset(tb->blankline,' ',width);
    tb->blankline[width] = '\0';

    if (flags & NEWT_FLAG_SCROLL) {
	co->width += 2;
	tb->sb_act = newtVerticalScrollbar(co->left + co->width - 1, co->top, 
			   co->height, COLORSET_ACTTEXTBOX, COLORSET_TEXTBOX);
	tb->sb = newtVerticalScrollbar(co->left + co->width - 1, co->top, 
			   co->height, COLORSET_TEXTBOX, COLORSET_TEXTBOX);
	co->takesFocus = 1;
    } else {
	tb->sb_act = tb->sb = NULL;
    }

    return co;
}

static char * expandTabs(const char * text) {
    int bufAlloced = strlen(text) + 40;
    char * buf, * dest;
    const char * src;
    int bufUsed = 0;
    int linePos = 0;
    int i;

    buf = malloc(bufAlloced + 1);
    for (src = text, dest = buf; *src; src++) {
	if ((bufUsed + 10) > bufAlloced) {
	    bufAlloced += strlen(text) / 2;
	    buf = realloc(buf, bufAlloced + 1);
	    dest = buf + bufUsed;
	}
	if (*src == '\t') {
	    i = 8 - (linePos & 8);
	    memset(dest, ' ', i);
	    dest += i, bufUsed += i, linePos += i;
	} else {
	    if (*src == '\n')
		linePos = 0;
	    else
		linePos++;

	    *dest++ = *src;
	    bufUsed++;
	}
    }

    *dest = '\0';
    return buf;
}

static void doReflow(const char * text, char ** resultPtr, int width, 
		     int * badness, int * heightPtr) {
    char * result = NULL;
    const char * chptr, * end;
    int i;
    int howbad = 0;
    int height = 0;
    wchar_t tmp;
    mbstate_t ps;

    if (resultPtr) {
	/* XXX I think this will work */
	result = malloc(strlen(text) + (strlen(text) / width) + 2);
	*result = '\0';
    }
	
    memset(&ps,0,sizeof(mbstate_t));
    while (*text) {
	end = strchr(text, '\n');
	if (!end)
	    end = text + strlen(text);

	while (*text && text <= end) {
	    int len;
		
	    len = wstrlen(text, end - text);
	    if (len < width) {
		if (result) {
		    strncat(result, text, end - text);
		    strcat(result, "\n");
		    height++;
		}

		if (len < (width / 2)) {
#ifdef DEBUG_WRAP		    
		fprintf(stderr,"adding %d\n",((width / 2) - (len)) / 2);
#endif					
		    howbad += ((width / 2) - (len)) / 2;
		}
		text = end;
		if (*text) text++;
	    } else {
		const char *spcptr = NULL;
	        int spc =0,w2, x;

	        chptr = text;
		w2 = 0;
		for (i = 0; i < width - 1;) {
			if ((x=mbrtowc(&tmp,chptr,end-chptr,&ps))<=0)
				break;
		        if (spc && !iswspace(tmp))
				spc = 0;
			else if (!spc && iswspace(tmp)) {
				spc = 1;
				spcptr = chptr;
				w2 = i;
			}
			chptr += x;
			x = wcwidth(tmp);
			if (x>0)
			    i+=x;
		}
		howbad += width - w2 + 1;
#ifdef DEBUG_WRAP		    
		fprintf(stderr,"adding %d\n",width - w2 + 1, chptr);
#endif					
		if (spcptr) chptr = spcptr;
		if (result) {
		    strncat(result, text, chptr - text );
		    strcat(result, "\n");
		    height++;
		}

		text = chptr;
		while (1) {
			if ((x=mbrtowc(&tmp,text,end-text,NULL))<=0)
				break;
			if (!iswspace(tmp)) break;
			text += x;
		}
	    }
	}
    }

    if (badness) *badness = howbad;
    if (resultPtr) *resultPtr = result;
    if (heightPtr) *heightPtr = height;
#ifdef DEBUG_WRAP
    fprintf(stderr, "width %d, badness %d, height %d\n",width, howbad, height);
#endif
}

char * newtReflowText(char * text, int width, int flexDown, int flexUp,
		      int * actualWidth, int * actualHeight) {
    int min, max;
    int i;
    char * result;
    int minbad, minbadwidth, howbad;
    char * expandedText;

    expandedText = expandTabs(text);

    if (flexDown || flexUp) {
	min = width - flexDown;
	max = width + flexUp;

	minbad = -1;
	minbadwidth = width;

	for (i = min; i <= max; i++) {
	    doReflow(expandedText, NULL, i, &howbad, NULL);

	    if (minbad == -1 || howbad < minbad) {
		minbad = howbad;
		minbadwidth = i;
	    }
 	}

	width = minbadwidth;
    }

    doReflow(expandedText, &result, width, NULL, actualHeight);
    free(expandedText);
    if (actualWidth) *actualWidth = width;
    return result;
}

void newtTextboxSetText(newtComponent co, const char * text) {
    const char * start, * end;
    struct textbox * tb = co->data;
    char * reflowed, * expanded;
    int badness, height;

    if (tb->lines) {
	free(tb->lines);
	tb->linesAlloced = tb->numLines = 0;
    }

    expanded = expandTabs(text);

    if (tb->doWrap) {
	doReflow(expanded, &reflowed, tb->textWidth, &badness, &height);
	free(expanded);
	expanded = reflowed;
    }

    for (start = expanded; *start; start++)
	if (*start == '\n') tb->linesAlloced++;

    /* This ++ leaves room for an ending line w/o a \n */
    tb->linesAlloced++;
    tb->lines = malloc(sizeof(char *) * tb->linesAlloced);

    start = expanded;
    while ((end = strchr(start, '\n'))) {
	addLine(co, start, end - start);
	start = end + 1;
    }

    if (*start)
	addLine(co, start, strlen(start));

    free(expanded);
    
    textboxDraw(co);

    newtTrashScreen();    
}

/* This assumes the buffer is allocated properly! */
static void addLine(newtComponent co, const char * s, int len) {
    struct textbox * tb = co->data;

    while (wstrlen(s,len) > tb->textWidth) {
	    len--;
    }
    tb->lines[tb->numLines] = malloc(len + 1);
    memcpy(tb->lines[tb->numLines], s, len);
    tb->lines[tb->numLines++][len] = '\0';
}

static void textboxDraw(newtComponent c) {
    int i;
    struct textbox * tb = c->data;
    int size;

    if (!c->isMapped)
	    return;

    if (tb->sb) {
	size = tb->numLines - c->height;
	if (tb->isActive) {
		newtScrollbarSet(tb->sb_act, tb->topLine, size ? size : 0);
		tb->sb_act->ops->draw(tb->sb_act);
	} else {
		newtScrollbarSet(tb->sb, tb->topLine, size ? size : 0);
		tb->sb->ops->draw(tb->sb);
	}
    }

    SLsmg_set_color(NEWT_COLORSET_TEXTBOX);

    for (i = 0; (i + tb->topLine) < tb->numLines && i < c->height; i++) {
	newtGotorc(c->top + i, c->left);
	SLsmg_write_string(tb->blankline);
	newtGotorc(c->top + i, c->left);
	SLsmg_write_string(tb->lines[i + tb->topLine]);
    }
    /* put cursor at beginning of text for better accessibility */
    newtGotorc(c->top, c->left);
}

static struct eventResult textboxEvent(newtComponent co, 
				      struct event ev) {
    struct textbox * tb = co->data;
    struct eventResult er;

    er.result = ER_IGNORED;

    if (!tb->sb || ev.when == EV_EARLY || ev.when == EV_LATE)
	return er;

    switch(ev.event) {
      case EV_KEYPRESS:
	newtTrashScreen();
	switch (ev.u.key) {
	  case NEWT_KEY_UP:
	    if (tb->topLine) tb->topLine--;
	    textboxDraw(co);
	    er.result = ER_SWALLOWED;
	    break;

	  case NEWT_KEY_DOWN:
	    if (tb->topLine < (tb->numLines - co->height)) tb->topLine++;
	    textboxDraw(co);
	    er.result = ER_SWALLOWED;
	    break;

	  case NEWT_KEY_PGDN:
	    tb->topLine += co->height;
	    if (tb->topLine > (tb->numLines - co->height)) {
		tb->topLine = tb->numLines - co->height;
		if (tb->topLine < 0) tb->topLine = 0;
	    }
	    textboxDraw(co);
	    er.result = ER_SWALLOWED;
	    break;

	  case NEWT_KEY_PGUP:
	    tb->topLine -= co->height;
	    if (tb->topLine < 0) tb->topLine = 0;
	    textboxDraw(co);
	    er.result = ER_SWALLOWED;
	    break;
	}
	break;
      case EV_MOUSE:
	/* Top scroll arrow */
	if (ev.u.mouse.x == co->width && ev.u.mouse.y == co->top) {
	    if (tb->topLine) tb->topLine--;
	    textboxDraw(co);
	    
	    er.result = ER_SWALLOWED;
	}
	/* Bottom scroll arrow */
	if (ev.u.mouse.x == co->width &&
	    ev.u.mouse.y == co->top + co->height - 1) {
	    if (tb->topLine < (tb->numLines - co->height)) tb->topLine++;
	    textboxDraw(co);
	    
	    er.result = ER_SWALLOWED;
	}
	break;
      case EV_FOCUS:
	tb->isActive = 1;
	textboxDraw(co);
	er.result = ER_SWALLOWED;
	break;
      case EV_UNFOCUS:
	tb->isActive = 0;
	textboxDraw(co);
	er.result = ER_SWALLOWED;
	break;
    }
    return er;
}

static void textboxDestroy(newtComponent co) {
    int i;
    struct textbox * tb = co->data;

    if (tb->sb)
	tb->sb->ops->destroy(tb->sb);
    if (tb->sb_act)
	tb->sb_act->ops->destroy(tb->sb_act);
    for (i = 0; i < tb->numLines; i++) 
	free(tb->lines[i]);
    free(tb->lines);
    free(tb->blankline);
    free(tb);
    free(co);
}
Commit	Line	Data
349586bb	1
20476098	2	#include <ctype.h>
139f06bc	3	#include <slang.h>
20476098	4	#include <stdlib.h>
05130221	5	#include <string.h>
349586bb	6	#include <wchar.h>
349586bb	7	#include <wctype.h>
20476098	8
	9	#include "newt.h"
	10	#include "newt_pr.h"
	11
	12	struct textbox {
	13	char ** lines;
	14	int numLines;
349586bb	15	char *blankline;
20476098	16	int linesAlloced;
20476098	17	int doWrap;
9fc6a6b0	18	newtComponent sb_act, sb;
20476098	19	int topLine;
8f52cd47	20	int textWidth;
9fc6a6b0	21	int isActive;
20476098	22	};
20476098	23
aa2a62d9	24	static char * expandTabs(const char * text);
20476098	25	static void textboxDraw(newtComponent co);
aa2a62d9	26	static void addLine(newtComponent co, const char * s, int len);
aa2a62d9	27	static void doReflow(const char * text, char ** resultPtr, int width,
6f481af2	28	int * badness, int * heightPtr);
45c366b1	29	static struct eventResult textboxEvent(newtComponent c,
6f481af2	30	struct event ev);
20476098	31	static void textboxDestroy(newtComponent co);
8f52cd47	32	static void textboxPlace(newtComponent co, int newLeft, int newTop);
8f52cd47	33	static void textboxMapped(newtComponent co, int isMapped);
20476098	34
	35	static struct componentOps textboxOps = {
	36	textboxDraw,
	37	textboxEvent,
	38	textboxDestroy,
8f52cd47	39	textboxPlace,
8f52cd47	40	textboxMapped,
20476098	41	} ;
20476098	42
8f52cd47	43	static void textboxMapped(newtComponent co, int isMapped) {
	44	struct textbox * tb = co->data;
	45
	46	co->isMapped = isMapped;
9fc6a6b0	47	if (tb->sb) {
6f481af2	48	tb->sb->ops->mapped(tb->sb, isMapped);
9fc6a6b0	49	tb->sb_act->ops->mapped(tb->sb_act, isMapped);
9fc6a6b0	50	}
8f52cd47	51	}
	52
	53	static void textboxPlace(newtComponent co, int newLeft, int newTop) {
	54	struct textbox * tb = co->data;
	55
	56	co->top = newTop;
	57	co->left = newLeft;
	58
9fc6a6b0	59	if (tb->sb) {
6f481af2	60	tb->sb->ops->place(tb->sb, co->left + co->width - 1, co->top);
9fc6a6b0	61	tb->sb_act->ops->place(tb->sb_act, co->left + co->width - 1, co->top);
9fc6a6b0	62	}
8f52cd47	63	}
8f52cd47	64
4b5d9a60	65	void newtTextboxSetHeight(newtComponent co, int height) {
	66	co->height = height;
	67	}
	68
	69	int newtTextboxGetNumLines(newtComponent co) {
	70	struct textbox * tb = co->data;
	71
	72	return (tb->numLines);
	73	}
	74
f1d6b549	75	newtComponent newtTextboxReflowed(int left, int top, char * text, int width,
6f481af2	76	int flexDown, int flexUp, int flags) {
f1d6b549	77	newtComponent co;
	78	char * reflowedText;
	79	int actWidth, actHeight;
	80
	81	reflowedText = newtReflowText(text, width, flexDown, flexUp,
6f481af2	82	&actWidth, &actHeight);
f1d6b549	83
5fab4758	84	co = newtTextbox(left, top, actWidth, actHeight, NEWT_FLAG_WRAP);
f1d6b549	85	newtTextboxSetText(co, reflowedText);
	86	free(reflowedText);
	87
	88	return co;
	89	}
	90
20476098	91	newtComponent newtTextbox(int left, int top, int width, int height, int flags) {
	92	newtComponent co;
	93	struct textbox * tb;
	94
	95	co = malloc(sizeof(*co));
	96	tb = malloc(sizeof(*tb));
	97	co->data = tb;
	98
feef2cb5	99	if (width < 2) width = 2;
feef2cb5	100
20476098	101	co->ops = &textboxOps;
20476098	102
0f6b2c8b	103	co->isMapped = 0;
20476098	104	co->height = height;
	105	co->top = top;
	106	co->left = left;
	107	co->takesFocus = 0;
8f52cd47	108	co->width = width;
c101e99e	109	co->destroyCallback = NULL;
20476098	110
4a93351d	111	tb->doWrap = flags & NEWT_FLAG_WRAP;
20476098	112	tb->numLines = 0;
	113	tb->linesAlloced = 0;
	114	tb->lines = NULL;
	115	tb->topLine = 0;
8f52cd47	116	tb->textWidth = width;
9fc6a6b0	117	tb->isActive = 0;
349586bb	118	tb->blankline = malloc(width+1);
	119	memset(tb->blankline,' ',width);
	120	tb->blankline[width] = '\0';
20476098	121
4a93351d	122	if (flags & NEWT_FLAG_SCROLL) {
6f481af2	123	co->width += 2;
9fc6a6b0	124	tb->sb_act = newtVerticalScrollbar(co->left + co->width - 1, co->top,
9fc6a6b0	125	co->height, COLORSET_ACTTEXTBOX, COLORSET_TEXTBOX);
6f481af2	126	tb->sb = newtVerticalScrollbar(co->left + co->width - 1, co->top,
6f481af2	127	co->height, COLORSET_TEXTBOX, COLORSET_TEXTBOX);
9fc6a6b0	128	co->takesFocus = 1;
20476098	129	} else {
9fc6a6b0	130	tb->sb_act = tb->sb = NULL;
20476098	131	}
	132
	133	return co;
	134	}
	135
aa2a62d9	136	static char * expandTabs(const char * text) {
	137	int bufAlloced = strlen(text) + 40;
	138	char * buf, * dest;
	139	const char * src;
	140	int bufUsed = 0;
48f7f39d	141	int linePos = 0;
aa2a62d9	142	int i;
	143
	144	buf = malloc(bufAlloced + 1);
	145	for (src = text, dest = buf; *src; src++) {
6f481af2	146	if ((bufUsed + 10) > bufAlloced) {
	147	bufAlloced += strlen(text) / 2;
	148	buf = realloc(buf, bufAlloced + 1);
	149	dest = buf + bufUsed;
	150	}
	151	if (*src == '\t') {
	152	i = 8 - (linePos & 8);
	153	memset(dest, ' ', i);
	154	dest += i, bufUsed += i, linePos += i;
	155	} else {
	156	if (*src == '\n')
	157	linePos = 0;
	158	else
	159	linePos++;
	160
	161	dest++ = src;
	162	bufUsed++;
	163	}
aa2a62d9	164	}
	165
	166	*dest = '\0';
	167	return buf;
	168	}
	169
	170	static void doReflow(const char * text, char ** resultPtr, int width,
6f481af2	171	int * badness, int * heightPtr) {
a7582573	172	char * result = NULL;
aa2a62d9	173	const char * chptr, * end;
771c47c0	174	int i;
a7582573	175	int howbad = 0;
a7582573	176	int height = 0;
349586bb	177	wchar_t tmp;
349586bb	178	mbstate_t ps;
a7582573	179
a7582573	180	if (resultPtr) {
6f481af2	181	/* XXX I think this will work */
	182	result = malloc(strlen(text) + (strlen(text) / width) + 2);
	183	*result = '\0';
a7582573	184	}
6f481af2	185
349586bb	186	memset(&ps,0,sizeof(mbstate_t));
a7582573	187	while (*text) {
6f481af2	188	end = strchr(text, '\n');
	189	if (!end)
	190	end = text + strlen(text);
	191
	192	while (*text && text <= end) {
	193	int len;
	194
	195	len = wstrlen(text, end - text);
	196	if (len < width) {
	197	if (result) {
	198	strncat(result, text, end - text);
	199	strcat(result, "\n");
	200	height++;
	201	}
	202
	203	if (len < (width / 2)) {
	204	#ifdef DEBUG_WRAP
	205	fprintf(stderr,"adding %d\n",((width / 2) - (len)) / 2);
	206	#endif
	207	howbad += ((width / 2) - (len)) / 2;
	208	}
	209	text = end;
	210	if (*text) text++;
	211	} else {
	212	const char *spcptr = NULL;
	213	int spc =0,w2, x;
	214
	215	chptr = text;
	216	w2 = 0;
	217	for (i = 0; i < width - 1;) {
	218	if ((x=mbrtowc(&tmp,chptr,end-chptr,&ps))<=0)
	219	break;
	220	if (spc && !iswspace(tmp))
	221	spc = 0;
	222	else if (!spc && iswspace(tmp)) {
	223	spc = 1;
	224	spcptr = chptr;
	225	w2 = i;
	226	}
	227	chptr += x;
	228	x = wcwidth(tmp);
	229	if (x>0)
	230	i+=x;
	231	}
	232	howbad += width - w2 + 1;
	233	#ifdef DEBUG_WRAP
	234	fprintf(stderr,"adding %d\n",width - w2 + 1, chptr);
	235	#endif
	236	if (spcptr) chptr = spcptr;
	237	if (result) {
	238	strncat(result, text, chptr - text );
	239	strcat(result, "\n");
	240	height++;
	241	}
	242
	243	text = chptr;
	244	while (1) {
	245	if ((x=mbrtowc(&tmp,text,end-text,NULL))<=0)
	246	break;
	247	if (!iswspace(tmp)) break;
	248	text += x;
	249	}
	250	}
	251	}
63231242	252	}
63231242	253
a7582573	254	if (badness) *badness = howbad;
	255	if (resultPtr) *resultPtr = result;
	256	if (heightPtr) *heightPtr = height;
349586bb	257	#ifdef DEBUG_WRAP
	258	fprintf(stderr, "width %d, badness %d, height %d\n",width, howbad, height);
	259	#endif
a7582573	260	}
	261
	262	char * newtReflowText(char * text, int width, int flexDown, int flexUp,
6f481af2	263	int * actualWidth, int * actualHeight) {
a7582573	264	int min, max;
	265	int i;
	266	char * result;
	267	int minbad, minbadwidth, howbad;
aa2a62d9	268	char * expandedText;
	269
	270	expandedText = expandTabs(text);
a7582573	271
a7582573	272	if (flexDown \|\| flexUp) {
6f481af2	273	min = width - flexDown;
6f481af2	274	max = width + flexUp;
a7582573	275
6f481af2	276	minbad = -1;
6f481af2	277	minbadwidth = width;
a7582573	278
6f481af2	279	for (i = min; i <= max; i++) {
6f481af2	280	doReflow(expandedText, NULL, i, &howbad, NULL);
a7582573	281
6f481af2	282	if (minbad == -1 \|\| howbad < minbad) {
	283	minbad = howbad;
	284	minbadwidth = i;
	285	}
	286	}
a7582573	287
6f481af2	288	width = minbadwidth;
a7582573	289	}
a7582573	290
aa2a62d9	291	doReflow(expandedText, &result, width, NULL, actualHeight);
aa2a62d9	292	free(expandedText);
a7582573	293	if (actualWidth) *actualWidth = width;
	294	return result;
	295	}
	296
20476098	297	void newtTextboxSetText(newtComponent co, const char * text) {
	298	const char * start, * end;
	299	struct textbox * tb = co->data;
aa2a62d9	300	char * reflowed, * expanded;
aa2a62d9	301	int badness, height;
20476098	302
20476098	303	if (tb->lines) {
6f481af2	304	free(tb->lines);
6f481af2	305	tb->linesAlloced = tb->numLines = 0;
20476098	306	}
20476098	307
aa2a62d9	308	expanded = expandTabs(text);
	309
	310	if (tb->doWrap) {
6f481af2	311	doReflow(expanded, &reflowed, tb->textWidth, &badness, &height);
	312	free(expanded);
	313	expanded = reflowed;
aa2a62d9	314	}
	315
	316	for (start = expanded; *start; start++)
6f481af2	317	if (*start == '\n') tb->linesAlloced++;
aa2a62d9	318
	319	/* This ++ leaves room for an ending line w/o a \n */
	320	tb->linesAlloced++;
	321	tb->lines = malloc(sizeof(char ) tb->linesAlloced);
20476098	322
aa2a62d9	323	start = expanded;
20476098	324	while ((end = strchr(start, '\n'))) {
6f481af2	325	addLine(co, start, end - start);
6f481af2	326	start = end + 1;
20476098	327	}
	328
	329	if (*start)
6f481af2	330	addLine(co, start, strlen(start));
20476098	331
aa2a62d9	332	free(expanded);
add984c1	333
0f6b2c8b ML	334	textboxDraw(co);
0f6b2c8b ML	335
add984c1	336	newtTrashScreen();
20476098	337	}
20476098	338
aa2a62d9	339	/* This assumes the buffer is allocated properly! */
aa2a62d9	340	static void addLine(newtComponent co, const char * s, int len) {
20476098	341	struct textbox * tb = co->data;
20476098	342
349586bb	343	while (wstrlen(s,len) > tb->textWidth) {
6f481af2	344	len--;
349586bb	345	}
349586bb	346	tb->lines[tb->numLines] = malloc(len + 1);
aa2a62d9	347	memcpy(tb->lines[tb->numLines], s, len);
349586bb	348	tb->lines[tb->numLines++][len] = '\0';
20476098	349	}
	350
	351	static void textboxDraw(newtComponent c) {
	352	int i;
	353	struct textbox * tb = c->data;
	354	int size;
10de8f4a	355
0f6b2c8b ML	356	if (!c->isMapped)
	357	return;
	358
20476098	359	if (tb->sb) {
6f481af2	360	size = tb->numLines - c->height;
9fc6a6b0	361	if (tb->isActive) {
	362	newtScrollbarSet(tb->sb_act, tb->topLine, size ? size : 0);
	363	tb->sb_act->ops->draw(tb->sb_act);
	364	} else {
	365	newtScrollbarSet(tb->sb, tb->topLine, size ? size : 0);
	366	tb->sb->ops->draw(tb->sb);
	367	}
20476098	368	}
676cfb93	369
676cfb93	370	SLsmg_set_color(NEWT_COLORSET_TEXTBOX);
7ff5fd71	371
20476098	372	for (i = 0; (i + tb->topLine) < tb->numLines && i < c->height; i++) {
6f481af2	373	newtGotorc(c->top + i, c->left);
	374	SLsmg_write_string(tb->blankline);
	375	newtGotorc(c->top + i, c->left);
10de8f4a	376	SLsmg_write_string(tb->lines[i + tb->topLine]);
20476098	377	}
4e667865	378	/* put cursor at beginning of text for better accessibility */
4e667865	379	newtGotorc(c->top, c->left);
20476098	380	}
20476098	381
45c366b1	382	static struct eventResult textboxEvent(newtComponent co,
6f481af2	383	struct event ev) {
20476098	384	struct textbox * tb = co->data;
	385	struct eventResult er;
	386
	387	er.result = ER_IGNORED;
	388
9fc6a6b0	389	if (!tb->sb \|\| ev.when == EV_EARLY \|\| ev.when == EV_LATE)
	390	return er;
	391
	392	switch(ev.event) {
	393	case EV_KEYPRESS:
6f481af2	394	newtTrashScreen();
	395	switch (ev.u.key) {
	396	case NEWT_KEY_UP:
	397	if (tb->topLine) tb->topLine--;
	398	textboxDraw(co);
	399	er.result = ER_SWALLOWED;
	400	break;
	401
	402	case NEWT_KEY_DOWN:
	403	if (tb->topLine < (tb->numLines - co->height)) tb->topLine++;
	404	textboxDraw(co);
	405	er.result = ER_SWALLOWED;
	406	break;
	407
	408	case NEWT_KEY_PGDN:
	409	tb->topLine += co->height;
	410	if (tb->topLine > (tb->numLines - co->height)) {
	411	tb->topLine = tb->numLines - co->height;
	412	if (tb->topLine < 0) tb->topLine = 0;
	413	}
	414	textboxDraw(co);
	415	er.result = ER_SWALLOWED;
	416	break;
	417
	418	case NEWT_KEY_PGUP:
	419	tb->topLine -= co->height;
	420	if (tb->topLine < 0) tb->topLine = 0;
	421	textboxDraw(co);
	422	er.result = ER_SWALLOWED;
	423	break;
	424	}
9fc6a6b0	425	break;
9fc6a6b0	426	case EV_MOUSE:
6f481af2	427	/* Top scroll arrow */
	428	if (ev.u.mouse.x == co->width && ev.u.mouse.y == co->top) {
	429	if (tb->topLine) tb->topLine--;
	430	textboxDraw(co);
	431
	432	er.result = ER_SWALLOWED;
	433	}
	434	/* Bottom scroll arrow */
	435	if (ev.u.mouse.x == co->width &&
	436	ev.u.mouse.y == co->top + co->height - 1) {
	437	if (tb->topLine < (tb->numLines - co->height)) tb->topLine++;
	438	textboxDraw(co);
	439
	440	er.result = ER_SWALLOWED;
	441	}
9fc6a6b0	442	break;
	443	case EV_FOCUS:
	444	tb->isActive = 1;
	445	textboxDraw(co);
	446	er.result = ER_SWALLOWED;
	447	break;
	448	case EV_UNFOCUS:
	449	tb->isActive = 0;
	450	textboxDraw(co);
	451	er.result = ER_SWALLOWED;
	452	break;
45f6c4fd	453	}
20476098	454	return er;
	455	}
	456
	457	static void textboxDestroy(newtComponent co) {
	458	int i;
	459	struct textbox * tb = co->data;
	460
f7a354ed	461	if (tb->sb)
	462	tb->sb->ops->destroy(tb->sb);
	463	if (tb->sb_act)
	464	tb->sb_act->ops->destroy(tb->sb_act);
20476098	465	for (i = 0; i < tb->numLines; i++)
6f481af2	466	free(tb->lines[i]);
20476098	467	free(tb->lines);
349586bb	468	free(tb->blankline);
20476098	469	free(tb);
	470	free(co);
	471	}