From 4c314d8bf7331eedc483d12905088359b20a707f Mon Sep 17 00:00:00 2001
From: Mazar Farran <mifarran@ucdavis.edu>
Date: Sat, 20 Sep 2014 16:12:04 -0700
Subject: [PATCH] first commit

---
 text.c | 212 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 text.c

diff --git a/text.c b/text.c
new file mode 100644
index 0000000..6ed2d73
--- /dev/null
+++ b/text.c
@@ -0,0 +1,212 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <ncurses.h> // -lncurses
+
+#define PAGE_SIZE 500
+#define LINE_SIZE 128
+#define WIN_SIZE LINES - 2
+
+/**
+ * Word Processing Program
+ * Features:
+ *	-Real time editing
+ *	-Saving
+ *	-Loading	
+ **/
+
+typedef struct
+{
+	char *line;
+	int size; 
+} LINE;
+
+typedef struct
+{
+	LINE *text; // lines of text
+	int numlines;
+} PAGE;
+
+void load_file(int argc, char **argv, PAGE *p);
+void save_file(int argc, char **argv, PAGE *p);
+void init_page(PAGE *p);
+void dest_page(PAGE *p);
+void insert(LINE *s, char c, int index); // inserts to string
+void remove_char(LINE *s, int index);
+void expand(LINE *s);
+void print_page(const PAGE *p);
+
+int main(int argc, char *argv[])
+{
+	PAGE page;
+	init_page(&page);
+
+	if(argc > 1)
+	{
+		load_file(argc, argv, &page);
+	}
+
+	/* curses interface */
+	initscr();
+	noecho();
+	keypad(stdscr, true);
+
+	attron(A_REVERSE);
+	mvprintw(LINES - 1, 0, "Press F4 to quit.");
+	attroff(A_REVERSE);
+
+	print_page(&page);
+
+	int y, x;
+	getyx(stdscr, y, x);
+
+	while(true)
+	{
+		int ch = getch();
+		switch(ch)
+		{
+			case KEY_F(4):
+				goto end;
+				break;
+			case KEY_UP:
+				if( y >= 0 ) move(--y, x);
+				break;
+			case KEY_DOWN:
+				if( y < WIN_SIZE ) move(++y, x);
+				break;
+			case KEY_LEFT:
+				if(x - 1 > 0)
+					move(y, --x);
+				break;
+			case KEY_RIGHT:
+				if(x <= strlen(page.text[y].line))
+					move(y, ++x);
+				break;
+			case KEY_DC:
+			case 127: // backspace key...
+			case KEY_BACKSPACE:
+				remove_char(&page.text[y], x - 1);
+				print_page(&page);
+				move(y, --x);
+				refresh();
+				break;
+			default: // all other chars
+				if( isprint(ch) )
+				{
+					insert(&page.text[y], ch, x - 1);
+					print_page(&page);
+					move(y, ++x);
+					refresh(); 
+				}
+		}
+	}
+end:	endwin();
+	/* end curses */
+
+	dest_page(&page);
+	return EXIT_SUCCESS;
+} // main
+
+
+void load_file(int argc, char **argv, PAGE *p)
+{
+	FILE *fp = fopen(argv[1], "r");
+	char ch = 0;
+	int line, col;
+
+	for(line = 0; line < PAGE_SIZE && ch != EOF; line++)
+	{
+		for(col = 0; col < LINE_SIZE - 1 && ((ch = fgetc(fp)) != '\n') && ch != EOF; col++)
+		{
+			p->text[line].line[col] = ch;
+		}
+		p->text[line].line[col] = '\0';
+		p->numlines++;
+	}
+
+	fclose(fp);
+
+} // load_file
+
+void save_file(int argc, char **argv, PAGE *p)
+{
+	FILE *fp = fopen("save.txt", "w");
+	int line, col;
+
+	for(line = 0; line < p->numlines; line++)
+	{
+		col = 0;
+		while(p->text[line].line[col] != '\0')
+		{
+			fputc(p->text[line].line[col], fp);
+		}
+		fputc('\n', fp);
+	}
+	fputc(EOF, fp);
+
+	fclose(fp);
+
+} // save_file
+
+void init_page(PAGE *p)
+{
+	p->text = (LINE *)malloc(PAGE_SIZE * sizeof(LINE));
+
+	int i;
+	for(i = 0; i < PAGE_SIZE; i++)
+	{
+		p->text[i].line = (char *)malloc(LINE_SIZE * sizeof(char));
+		p->text[i].size = LINE_SIZE;
+	}
+	p->numlines = 0;
+} // init_page
+
+void dest_page(PAGE *p)
+{
+	int i;
+	for(i = 0; i < p->numlines; i++)
+	{
+		free(p->text[i].line);
+	}
+	free(p->text);
+} // dest_page
+
+// Insert char into string. 
+void insert(LINE *s, char c, int index)
+{
+	int i;
+
+	if(strlen(s->line) >= s->size - 2) expand(s);
+
+	for(i = strlen(s->line); i >= index; i--)
+		s->line[i + 1] = s->line[i];
+
+	s->line[index] = c;
+} // insert
+
+void remove_char(LINE *s, int index)
+{
+	int i;
+	int len = strlen(s->line);
+	for(i = index; i < len; i++)
+		s->line[i] = s->line[i + 1];
+} // remove
+
+// expands size of line
+void expand(LINE *s)
+{
+	int new_size = s->size * 2;
+	char *temp = (char *)malloc(new_size * sizeof(char));
+	strcpy(temp, s->line);
+	free(s->line);
+	s->line = temp;
+	s->size = new_size;	
+} // expand
+
+void print_page(const PAGE *p)
+{
+	int i;
+	for(i = 0; i < p->numlines && i < WIN_SIZE; i++)
+		mvprintw(i, 1, "%s ", p->text[i].line);
+}