move.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 "zped.h"
#include "myExternal.h"



long int whereisX()
{
    	int i;
    	int n;
    	for(n = 0; current_x - (COLS-3)-n*((COLS-4)-3) > 0; n++) ;
    	if(n == 0) {
		return current_x;
    	}
    	return current_x-(COLS-3)-(n-1)*((COLS-4)-3)+5;
}


bool do_left()
{
    	long int cursor_x;
	move_x = current_x;
    	if(current_x > 0) {
		current_x--;
		move_x--;
		cursor_x = whereisX();
		wmove(edit,cursor_y,cursor_x);
    	} else {
		return 0;
    	}
    	return 1;
}



bool do_right()
{
	long int cursor_x;
	long int number = 0;
	move_x = current_x;
	if(current_R == fileBot) {
		number = current_R->num;
	} else {
		number = current_R->num-1;
	}
	if(number > current_x) {
		current_x++;
		move_x++;
		cursor_x = whereisX();
		wmove(edit,cursor_y,cursor_x);
	} else {
		return 0;
	}
	return 1;
}



bool do_up()
{
	long int cursor_x;
 	int count = 0;
	if(current_R == fileTop) {
		return 0;
	} else if(current_R == editTop) {
		while(count < (LINES-3)/2 && editTop != fileTop) {
			editTop = editTop->pre;
			cursor_y++;
			count++;
		}
		if(count < (LINES-3)/2) {
			current_R = current_R->pre;
			cursor_y--;
		}
		else {
			editTop = editTop->pre;
			current_R = current_R->pre;
		}

	} else {
		current_R = current_R->pre;
		cursor_y--;
	}
	if(current_R->num-1 < move_x) {
		current_x = current_R->num-1;
	} else
		current_x = move_x;
	cursor_x = whereisX();
	current_y--;
	wmove(edit,cursor_y,cursor_x);
	return 1;
}



bool do_down()
{
	long int cursor_x;
	long int number;
	int count = 0;
	if(current_R == fileBot) {
		return 0;
	} else  if(cursor_y == LINES-3) {
		while(count < (LINES-3)/2 && editTop != fileBot) {
			editTop = editTop->next;
			count++;
			cursor_y--;
		}
		if(count < (LINES-3)/2) {
			current_R = current_R->next;
			cursor_y++;
		} else {
			editTop = editTop->next;
			current_R = current_R->next;
		}
	} else {
		current_R = current_R->next;
		cursor_y++;
	}
	if(current_R == fileBot) {
		number = current_R->num;
	} else {
		number = current_R->num-1;
	}
	if(number < move_x) {
		current_x = number;
	} else
		current_x = move_x;
	cursor_x = whereisX();
	current_y++;
	wmove(edit,cursor_y,cursor_x);
	return 1;
}




bool do_home()
{
	current_x = 0;
	move_x = current_x;
	wmove(edit,cursor_y,current_x);
	return 1;
}

bool do_end()
{
	int cursor_x;
	if(current_R == fileBot)
		current_x = current_R->num;
	else
		current_x = current_R->num-1;
	cursor_x = whereisX();
	move_x = current_x;
	wmove(edit,cursor_y,cursor_x);
	return 1;
}



bool do_pageup()
{
	long count = 0;
	int cursor_x = 0;
	while(count < LINES-2 && current_R != fileTop) {
		current_R = current_R->pre;
		count++;
		current_y--;
	}
	editTop = current_R;
	if(current_R->num-1 < move_x) {
		current_x = current_R->num-1;
	} else
		current_x = move_x;
	cursor_y = 0;
	cursor_x = whereisX();
	wmove(edit,cursor_y,cursor_x);
	return 1;
}



bool do_pagedown()
{
	long count = 0;
	long number = 0;
	int cursor_x = 0;
	while(count < LINES-3 && current_R != fileBot) {
		current_R = current_R->next;
		count++;
		current_y++;
	}
	editTop = current_R;
	if(current_R == fileBot) {
		number = current_R->num;
	} else {
		number = current_R->num-1;
	}
	if(number < move_x) {
		current_x = number;
	} else
		current_x = move_x;
	cursor_y = 0;
	cursor_x = whereisX();
	wmove(edit,cursor_y,cursor_x);
	return 1;
}



bool do_back_word()
{
    return 1;
}




bool do_end_word()
{
    return 1;
}



bool do_go_to_line(long lineNum)
{
    long count = 0;
    Rnode * Rtemp;
    Rtemp = fileTop;
    if(lineNum > totalLine)
	    lineNum = totalLine-1;
    while(count < lineNum) {
	Rtemp = Rtemp->next;
	count++;
    }
    if(lineNum < LINES-3) {
	editTop = fileTop;
	current_y = lineNum;
	current_x = 0;
	cursor_y = lineNum;
	current_R = Rtemp;
    } else {
	count = 0;
	current_R = Rtemp;
	while(count < (LINES-3)/2) {
	    Rtemp = Rtemp->pre;
	    count++;
	}
	editTop = Rtemp;
	current_y = lineNum;
	cursor_y = (LINES-3)/2;
	current_x = 0;
    }
    wmove(edit,cursor_y,0);
    return 1;
}