full split complete

term.c

@@ -1,13 +1,18 @@
+#include <sys/ioctl.h>
 #include <assert.h>
 #include <errno.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <termios.h>
 #include <unistd.h>
-#include <sys/ioctl.h>
 
 #include "abuf.h"
 #include "core.h"
+#include "buffer.h"
+#include "editing.h"
+#include "editor.h"
+#include "process.h"
 #include "term.h"
 
 #define ESCSEQ "\x1b["
@@ -85,3 +90,223 @@ get_winsz(size_t *rows, size_t *cols)
     return 0;
 }
 
+
+void
+draw_rows(abuf *ab)
+{
+	abuf	*row              = NULL;
+	char	 buf[editor.cols];
+	char	 c                = 0;
+	size_t	 j                = 0;
+	size_t	 filerow          = 0;
+	size_t	 y                = 0;
+	size_t	 len              = 0;
+	size_t	 padding          = 0;
+	size_t	 printed          = 0;
+	size_t	 rx               = 0;
+
+	for (y = 0; y < editor.rows; y++) {
+		filerow = y + EROWOFFS;
+		if (filerow >= ENROWS) {
+			if ((ENROWS == 0) && (y == editor.rows / 3)) {
+				len = snprintf(buf,
+				               sizeof(buf),
+				               "%s",
+				               KE_VERSION);
+				padding = (editor.rows - len) / 2;
+
+				if (padding) {
+					ab_append(ab, "|", 1);
+					padding--;
+				}
+
+				while (padding--)
+					ab_append(ab, " ", 1);
+				ab_append(ab, buf, len);
+			} else {
+				ab_append(ab, "|", 1);
+			}
+		} else {
+			row = &EROW[filerow];
+			j = 0;
+			rx = printed = 0;
+
+			while (j < row->size && printed < editor.cols) {
+				c = row->b[j];
+
+				if (rx < ECOLOFFS) {
+					if (c == '\t') rx += (TAB_STOP - (rx % TAB_STOP));
+					else if (c < 0x20) rx += 3;
+					else rx++;
+					j++;
+					continue;
+				}
+
+				if (c == '\t') {
+					int sp = TAB_STOP - (rx % TAB_STOP);
+					for (int k = 0; k < sp && printed < editor.cols; k++) {
+						ab_appendch(ab, ' ');
+						printed++;
+						rx++;
+					}
+				} else if (c < 0x20) {
+					char seq[4];
+					snprintf(seq, sizeof(seq), "\\%02x", c);
+					ab_append(ab, seq, 3);
+					printed += 3;
+					rx += 3;
+				} else {
+					ab_appendch(ab, c);
+					printed++;
+					rx++;
+				}
+				j++;
+			}
+			len = printed;
+		}
+		ab_append(ab, ESCSEQ "K", 3);
+		ab_append(ab, "\r\n", 2);
+	}
+}
+
+
+char
+status_mode_char(void)
+{
+	switch (editor.mode) {
+	case MODE_NORMAL:
+		return 'N';
+	case MODE_KCOMMAND:
+		return 'K';
+	case MODE_ESCAPE:
+		return 'E';
+	default:
+		return '?';
+	}
+}
+
+
+void
+draw_status_bar(abuf *ab)
+{
+	char	 status[editor.cols];
+	char	 rstatus[editor.cols];
+	char	 mstatus[editor.cols];
+	size_t	 len                   = 0;
+	size_t	 rlen                  = 0;
+
+	len = snprintf(status,
+		       sizeof(status),
+		       "%c%cke: %.20s - %lu lines",
+		       status_mode_char(),
+		       EDIRTY ? '!' : '-',
+		       EFILENAME ? EFILENAME : "[no file]",
+                ENROWS);
+
+	if (EMARK_SET) {
+		snprintf(mstatus,
+		         sizeof(mstatus),
+		         " | M: %lu, %lu ",
+		         EMARK_CURX + 1,
+		         EMARK_CURY + 1);
+	} else {
+		snprintf(mstatus, sizeof(mstatus), " | M:clear ");
+	}
+
+	rlen = snprintf(rstatus,
+	                sizeof(rstatus),
+	                "L%lu/%lu C%lu %s",
+	                ECURY + 1,
+	                ENROWS,
+	                ECURX + 1,
+	                mstatus);
+
+	ab_append(ab, ESCSEQ "7m", 4);
+	ab_append(ab, status, len);
+	while (len < editor.cols) {
+		if (editor.cols - len == rlen) {
+			ab_append(ab, rstatus, rlen);
+			break;
+		}
+		ab_append(ab, " ", 1);
+		len++;
+	}
+
+	ab_append(ab, ESCSEQ "m", 3);
+	ab_append(ab, "\r\n", 2);
+}
+
+
+void
+draw_message_line(abuf *ab)
+{
+	size_t	 len = strlen(editor.msg);
+
+	ab_append(ab, ESCSEQ "K", 3);
+	if (len > editor.cols) {
+		len = editor.cols;
+	}
+
+	if (len && time(NULL) - editor.msgtm < MSG_TIMEO) {
+		ab_append(ab, editor.msg, len);
+	}
+}
+
+
+void
+scroll(void)
+{
+	const abuf	*row = NULL;
+
+	ERX = 0;
+	if (ECURY < ENROWS) {
+		row = &EROW[ECURY];
+		ERX = erow_render_to_cursor(row, ECURX);
+	}
+
+	if (ECURY < EROWOFFS) {
+		EROWOFFS = ECURY;
+	}
+
+	if (ECURY >= EROWOFFS + editor.rows) {
+		EROWOFFS = ECURY - editor.rows + 1;
+	}
+
+	if (ERX < ECOLOFFS) {
+		ECOLOFFS = ERX;
+	}
+
+	if (ERX >= ECOLOFFS + editor.cols) {
+		ECOLOFFS = ERX - editor.cols + 1;
+	}
+}
+
+
+void
+display_refresh(void)
+{
+	char	 buf[32] = {0};
+	abuf	 ab      = ABUF_INIT;
+
+	scroll();
+
+	ab_append(&ab, ESCSEQ "?25l", 6);
+	ab_append(&ab, ESCSEQ "H", 3);
+	display_clear(&ab);
+
+	draw_rows(&ab);
+	draw_status_bar(&ab);
+	draw_message_line(&ab);
+
+	snprintf(buf,
+	         sizeof(buf),
+	         ESCSEQ "%lu;%luH",
+	         (ECURY - EROWOFFS) + 1,
+	         (ERX - ECOLOFFS) + 1);
+	ab_append(&ab, buf, kstrnlen(buf, 32));
+	/* ab_append(&ab, ESCSEQ "1;2H", 7); */
+	ab_append(&ab, ESCSEQ "?25h", 6);
+
+	kwrite(STDOUT_FILENO, ab.b, (int)ab.size);
+	ab_free(&ab);
+}