From: ewt <ewt>
Date: Wed, 17 Apr 1996 00:42:02 +0000 (+0000)
Subject: Initial revision
X-Git-Tag: 0-1~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20476098c5b4f21ccb84faf0df4fc598c6ac2ef7;p=thirdparty%2Fnewt.git

Initial revision
---

diff --git a/textbox.c b/textbox.c
new file mode 100644
index 0000000..504ebbe
--- /dev/null
+++ b/textbox.c
@@ -0,0 +1,188 @@
+#include <ctype.h>
+#include <slang/slang.h>
+#include <stdlib.h>
+
+#include "newt.h"
+#include "newt_pr.h"
+
+struct textbox {
+    char ** lines;
+    int numLines;
+    int linesAlloced;
+    int doWrap;
+    newtComponent sb;
+    int topLine;
+};
+
+static void addLine(newtComponent co, const char * s, int len);
+static void textboxDraw(newtComponent co);
+static void addShortLine(newtComponent co, const char * s, int len);
+static struct eventResult textboxEvent(struct newtComponent * c, 
+				      struct event ev);
+static void textboxDestroy(newtComponent co);
+
+static struct componentOps textboxOps = {
+    textboxDraw,
+    textboxEvent,
+    textboxDestroy,
+} ;
+
+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;
+
+    co->ops = &textboxOps;
+
+    co->height = height;
+    co->top = top;
+    co->left = left;
+    co->takesFocus = 0;
+
+    tb->doWrap = flags & NEWT_TEXTBOX_WRAP;
+    tb->numLines = 0;
+    tb->linesAlloced = 0;
+    tb->lines = NULL;
+    tb->topLine = 0;
+
+    if (flags & NEWT_TEXTBOX_SCROLL) {
+	co->width = width - 2;
+	tb->sb = newtVerticalScrollbar(co->left + co->width + 1, co->top, 
+			   co->height, COLORSET_TEXTBOX, COLORSET_TEXTBOX);
+    } else {
+	co->width = width;
+	tb->sb = NULL;
+    }
+
+    return co;
+}
+
+void newtTextboxSetText(newtComponent co, const char * text) {
+    const char * start, * end;
+    struct textbox * tb = co->data;
+
+    if (tb->lines) {
+	free(tb->lines);
+	tb->numLines = 0;
+    }
+
+    tb->linesAlloced = 10;
+    tb->lines = malloc(sizeof(char *) * 10);
+
+    start = text;
+    while ((end = strchr(start, '\n'))) {
+	addLine(co, start, end - start);
+	start = end + 1;
+    }
+
+    if (*start)
+	addLine(co, start, -1);
+}
+
+static void addLine(newtComponent co, const char * s, int origlen) {
+    const char * start, * end;
+    int len;
+    struct textbox * tb = co->data;
+
+    if (origlen < 0) origlen = strlen(s);
+    len = origlen;
+
+    if (!tb->doWrap || len <= co->width) {
+	addShortLine(co, s, len);
+    } else {
+	/* word wrap */
+
+	start = s;
+	while (len > co->width) {
+	    end = start + co->width - 1;
+	    while (end > start && !isspace(*end)) end--;
+
+	    if (end == start)
+		end = start + co->width - 1;
+
+	    addShortLine(co, start, end - start);
+	
+	    start = end + 1;
+	    while (isspace(*start) && *start) start++;
+
+	    len = origlen - (start - s);
+	}	
+
+	if (*start)
+	    addShortLine(co, start, len);
+    }
+}
+
+static void addShortLine(newtComponent co, const char * s, int len) {
+    struct textbox * tb = co->data;
+
+    if (tb->linesAlloced == tb->numLines) {
+	tb->linesAlloced += 10;
+	tb->lines = realloc(tb->lines, (sizeof(char *) * tb->linesAlloced));
+    }
+
+    if (len > co->width) len = co->width;
+
+    tb->lines[tb->numLines] = malloc(co->width + 1);
+    strncpy(tb->lines[tb->numLines], s, len);
+
+    while (len < co->width)  tb->lines[tb->numLines][len++] = ' ';
+    tb->lines[tb->numLines++][len] = '\0';
+}
+
+static void textboxDraw(newtComponent c) {
+    int i;
+    struct textbox * tb = c->data;
+    int size;
+
+    if (tb->sb) {
+	size = tb->numLines - c->height;
+	newtScrollbarSet(tb->sb, tb->topLine, size ? size : 0);
+	tb->sb->ops->draw(tb->sb);
+    }
+   
+    for (i = 0; (i + tb->topLine) < tb->numLines && i < c->height; i++) {
+	newtGotorc(c->top + i, c->left);
+	SLsmg_write_string(tb->lines[i + tb->topLine]);
+    }
+}
+
+static struct eventResult textboxEvent(struct newtComponent * co, 
+				      struct event ev) {
+    struct textbox * tb = co->data;
+    struct eventResult er;
+
+    er.result = ER_IGNORED;
+
+    if (ev.when == EV_EARLY && ev.event == EV_KEYPRESS && tb->sb) {
+	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;
+	}
+    }
+
+    return er;
+}
+
+static void textboxDestroy(newtComponent co) {
+    int i;
+    struct textbox * tb = co->data;
+
+    for (i = 0; i < tb->numLines; i++) 
+	free(tb->lines[i]);
+    free(tb->lines);
+    free(tb);
+    free(co);
+}