file.c

这是我写的一个仿照linux下编辑器vim写的一个简单的全屏文本编辑器

#include <stdio.h>
#include <stdlib.h>
#include "zped.h"
#include "myExternal.h"


/*add a colum node*/

Cnode * addCnode(Cnode * target)
{
	Cnode * temp = 0;
	if(!(temp = (Cnode *)malloc(sizeof(Cnode))))
		return (Cnode *)0;
	/*if the node add at the front of the row*/
	if(current_x == 0) {
		temp->next = current_R->rowHead;
		if(current_R->rowHead != 0)
			current_R->rowHead->pre = temp;
		current_R->rowHead = temp;
		temp->pre = 0;
	} else if (current_x == current_R->num) {	/*if the node add at the end of the row*/
		target->next = temp;
		temp->pre = target;
		temp->next = 0;
	} else {					/*if the node add at the middle of  the row*/
		temp->next = target->next;
		target->next->pre = temp;
		temp->pre = target;
		target->next = temp;
	}
	return temp;
}



/*delect a colum node*/
bool deleCnode(Cnode * target,Rnode * row)
{
	/*if the node is at the front of the row*/
	if(target->pre == 0) {
		row->rowHead = target->next;
		if(target->next != 0) {
			target->next->pre = 0;
		}
	} else if(target->next == 0) {	/*if the node is at the end of the row*/
		target->pre ->next = 0;
	} else {					/*if the node is at the middle of the row*/
		target->pre->next = target->next;
		target->next->pre = target->pre;
	}
	free(target);
	return 1;
}



/*delect a row node*/
bool deleRnode(Rnode * target)
{
	if(target->pre == 0)
		return 0;
	/*if the node is at the end of the file*/
	if(target->next == 0) {
		target->pre->next = 0;
	} else {
		target->pre->next = target->next;
		target->next->pre = target->pre;
	}
	free(target);
	return 1;
}



/*add a row node*/
Rnode * addRnode()
{
	Rnode * temp;
	if(!(temp = (Rnode *)malloc(sizeof(Rnode))))
		return (Rnode *)0;
	/*if the node add at the end of the file*/
	if(current_R->next == 0) {
		temp->next = 0;
		current_R->next = temp;
		temp->pre = current_R;
		temp->rowHead = 0;
		temp->num = 0;
	} else {
		temp->next = current_R->next;
		current_R->next->pre = temp;
		temp->pre = current_R;
		current_R->next = temp;
		temp->rowHead = 0;
		temp->num = 0;
	}
	return temp;
}


void add_one(int ch)
{
	int i = 0;
	Cnode * p = current_R->rowHead;
	Cnode * temp = 0;
	while(i < current_x - 1 && p) {
		p = p->next;
		i++;
	}
	/*if the char is an enter*/
	if(ch == FKEY_ENTER || ch == '\n') {
		if(current_x == 0) {		/*if the enter is added at the front of the row*/
			temp = addCnode((Cnode *)0);
			temp->ch = '\n';
			current_R = addRnode();
			current_R->num = current_R->pre->num;
			current_R->pre->num = 1;
			current_R->rowHead = temp->next;
			if(temp->next != 0) {
				temp->next->pre = 0;
				temp->next = 0;
			}
			mvwaddch(edit,3,3,current_R->pre->rowHead->ch);
		} else if(current_x == current_R-> num) {	/*if the enter is added at the end of the row*/
			temp = addCnode(p);
			temp->ch = '\n';
			current_R->num++;
			current_R = addRnode();
			current_R->num = 0;
		} else {
			temp = addCnode(p);
			temp->ch = '\n';
			current_R = addRnode();
			current_R->num = current_R->pre->num - current_x;
			current_R->pre->num = current_x + 1;
			current_R->rowHead = temp->next;
			temp->next->pre = 0;
			temp->next = 0;/*update the associable variables*/
		}
		/*update the associable variables*/
		current_x = 0;
		cursor_y++;
		current_y++;

		if(/*current_R->pre  == editBot && totalLine >= LINES - 2*/cursor_y > LINES - 3) {
			cursor_y--;
			//editBot = editBot->next;
			editTop = editTop->next;
		}
		totalLine++;
		if(fileBot == current_R->pre)
			fileBot = current_R;
	} else {		/*if the char is not an enter*/
		if(current_x == 0) {		/*if the char is added at the front of the row*/
			temp = addCnode(0);
			current_R->num++;
			temp->pre = 0;
		} else if(current_x == current_R->num) {	/*if the char is added at the end of the row*/
			temp = addCnode(p);
			current_R->num++;
			temp->next = 0;
		} else {
			temp = addCnode(p);
			current_R->num++;
		}
		temp->ch = ch;
		current_x++;
	}
	move_x = current_x;
}




bool dele_one()
{
	long int i = 0;
	Cnode * p;
	Cnode * temp = 0;
	/*if the char to be delected is an enter that means the cursor is at the front of the line*/
	if(current_x == 0) {
		if(current_R == fileTop) {			/*if the cursor is at the first line of the file*/
			return 0;
		} else {						/*if the cursor is not at the first line of the file*/
			p = current_R->pre->rowHead;
			while(p->ch != '\n')
				p = p->next;
			if(p->pre != 0) {
				temp = p->pre;
			}
			deleCnode(p,current_R->pre);
			if(temp == 0) {
				current_R->pre->rowHead = current_R->rowHead;
				//mvwaddch(edit,6,6,current_R->rowHead->ch);
			} else {
				temp->next = current_R->rowHead;
				if(current_R->rowHead != 0)
					current_R->rowHead->pre = temp;
			}

			/*update the associable variables*/
			current_x = current_R->pre->num -1;
			current_R->pre->num = current_R->pre->num + current_R->num - 1;
			cursor_y--;
			current_y--;
			if(current_R == fileBot)
				fileBot = current_R->pre;
			if(editTop == current_R /*&& totalLine > LINES - 2*/) {
				editTop = editTop->pre;
				cursor_y++;
			}
			current_R = current_R->pre;
			deleRnode(current_R->next);
			totalLine--;
		}
	} else if(current_x == current_R->num) {	/*if the char to be delected is at the end of the line*/
		p = current_R->rowHead;
		while(p->next != 0)
			p = p->next;
		if(p->pre == 0)
			current_R->rowHead = 0;
		else {
			p->pre->next = 0;
			current_R->rowHead->pre = 0;
		}
		current_x--;
		current_R->num--;
		deleCnode(p,current_R);
	} else {							/*if the char to be delected is at the middle of the line*/
		p = current_R->rowHead;
		while(i < current_x - 1) {
			p = p->next;
			i++;
		}
		if(p->pre == 0)
			current_R->rowHead = 0;
		else {
			p->pre->next = 0;
			current_R->rowHead->pre = 0;
		}
		current_x--;
		current_R->num--;
		deleCnode(p,current_R);
	}
	move_x = current_x;
}





bool readOneFile(char * pathName)
{
	int input;
	int i = 0;
	FILE * fp;
	if(!(fp = fopen(pathName,"r")))
		return false;
	while((input = getc(fp)) != EOF) {
		if(input == '\t')
			for(i = 0; i < 4; i++)
				add_one(' ');
		else
			add_one(input);
	}
	current_x = 0;
	current_y = 0;
	cursor_y = 0;
	move_x = 0;
	current_R = fileTop;
	editTop = fileTop;
	fclose(fp);
	return 1;
}



bool writeOneFile(char * pathName)
{
	int output;
	Rnode * Rtemp;
	Cnode * Ctemp;
	FILE * fp;
	if(!(fp = fopen(pathName,"w")))
		return false;
	for(Rtemp = fileTop; Rtemp != 0; Rtemp = Rtemp->next) {
		for(Ctemp = Rtemp->rowHead; Ctemp != 0; Ctemp = Ctemp->next) {
			putc(Ctemp->ch,fp);
		}
	}
	fclose(fp);
	return 1;
}






void insert_add_one(int ch)
{
    Cnode * Ctemp;
    long count = 0; 
    long number;
    if(current_R == fileBot) 
	number = current_R->num;
    else
	number = current_R->num-1;
    if(ch == '\n' || ch == FKEY_ENTER || current_x >= number) {
	add_one(ch);
    } else {
	Ctemp = current_R->rowHead;
	while(count < current_x) {
	    Ctemp = Ctemp->next;
	    count++;
	}
	Ctemp->ch = ch;
	do_right();
    }
}


void insert_dele_one()
{
    Cnode * Ctemp;
    long count = 0;
    if(current_x == 0) {
	current_R->rowHead->ch = ' ';
	dele_one();
    } else {
	Ctemp = current_R->rowHead;
	while(count < current_x) {
	    Ctemp = Ctemp->next;
	    count++;
	}
	Ctemp->ch = ' ';
	do_left();
    }
}