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Add keys functionality and variable tab size #85

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3685714
Make proper character deletion with DEL key
M4rtin23 Jul 24, 2021
6295ee8
Added variable tab size
M4rtin23 Jul 24, 2021
7f42e39
Converted from spaces to tabs
M4rtin23 Jul 24, 2021
87d6b21
include and define highlight
M4rtin23 Jul 25, 2021
0a8ffb3
HOME KEY and END KEY implementation
M4rtin23 Jul 25, 2021
1bb82ea
Now shows column number
M4rtin23 Jul 29, 2021
1fdd340
Back to spaces
M4rtin23 Dec 12, 2022
c37edfe
Merge branch 'antirez:master' into main
M4rtin23 Mar 12, 2025
a4e73e2
Added code I had lying around that I don't remember what it does.
M4rtin23 Mar 12, 2025
3b43364
Merge remote-tracking branch 'origin/main'
M4rtin23 Mar 12, 2025
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72 changes: 65 additions & 7 deletions kilo.c
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,8 @@
#define HL_HIGHLIGHT_STRINGS (1<<0)
#define HL_HIGHLIGHT_NUMBERS (1<<1)

#define TAB_SIZE 4

struct editorSyntax {
char **filematch;
char **keywords;
Expand Down Expand Up @@ -168,6 +170,7 @@ char *C_HL_keywords[] = {
"auto","break","case","continue","default","do","else","enum",
"extern","for","goto","if","register","return","sizeof","static",
"struct","switch","typedef","union","volatile","while","NULL",
"#include", "#define",

/* C++ Keywords */
"alignas","alignof","and","and_eq","asm","bitand","bitor","class",
Expand Down Expand Up @@ -564,18 +567,18 @@ void editorUpdateRow(erow *row) {
if (row->chars[j] == TAB) tabs++;

unsigned long long allocsize =
(unsigned long long) row->size + tabs*8 + nonprint*9 + 1;
(unsigned long long) row->size + tabs*TAB_SIZE + nonprint*9 + 1;
if (allocsize > UINT32_MAX) {
printf("Some line of the edited file is too long for kilo\n");
exit(1);
}

row->render = malloc(row->size + tabs*8 + nonprint*9 + 1);
row->render = malloc(row->size + tabs*TAB_SIZE + nonprint*9 + 1);
idx = 0;
for (j = 0; j < row->size; j++) {
if (row->chars[j] == TAB) {
row->render[idx++] = ' ';
while((idx+1) % 8 != 0) row->render[idx++] = ' ';
while((idx) % TAB_SIZE != 0) row->render[idx++] = ' ';
} else {
row->render[idx++] = row->chars[j];
}
Expand Down Expand Up @@ -791,7 +794,25 @@ void editorDelChar(void) {
if (row) editorUpdateRow(row);
E.dirty++;
}
void editorInvDelChar() {
int filerow = E.rowoff+E.cy;
int filecol = E.coloff+E.cx;
erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];
erow *followingRow = (filerow+1 >= E.numrows) ? NULL : &E.row[filerow+1];

if (!row || (filecol == 0 && filerow == 0)) return;
if (filecol == row->size) {
/* Handle the case of last column, we need to move the following line
* on the right of the current one. */
editorRowAppendString(&E.row[filerow],followingRow->chars,followingRow->size);
editorDelRow(filerow+1);
row = NULL;
} else {
editorRowDelChar(row,filecol);
}
if (row) editorUpdateRow(row);
E.dirty++;
}
/* Load the specified program in the editor memory and returns 0 on success
* or 1 on error. */
int editorOpen(char *filename) {
Expand Down Expand Up @@ -957,7 +978,7 @@ void editorRefreshScreen(void) {
int len = snprintf(status, sizeof(status), "%.20s - %d lines %s",
E.filename, E.numrows, E.dirty ? "(modified)" : "");
int rlen = snprintf(rstatus, sizeof(rstatus),
"%d/%d",E.rowoff+E.cy+1,E.numrows);
"c: %d/%d l: %d/%d",E.coloff+E.cx,E.row[E.rowoff+E.cy].size,E.rowoff+E.cy+1,E.numrows);
if (len > E.screencols) len = E.screencols;
abAppend(&ab,status,len);
while(len < E.screencols) {
Expand Down Expand Up @@ -986,7 +1007,7 @@ void editorRefreshScreen(void) {
erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];
if (row) {
for (j = E.coloff; j < (E.cx+E.coloff); j++) {
if (j < row->size && row->chars[j] == TAB) cx += 7-((cx)%8);
if (j < row->size && row->chars[j] == TAB) cx += TAB_SIZE-((cx)%TAB_SIZE);
cx++;
}
}
Expand Down Expand Up @@ -1113,11 +1134,13 @@ void editorMoveCursor(int key) {
int filerow = E.rowoff+E.cy;
int filecol = E.coloff+E.cx;
int rowlen;
erow *rowP = &E.row[filerow-1];
erow *row = (filerow >= E.numrows) ? NULL : &E.row[filerow];
erow *rowF = (filerow+1 >= E.numrows) ? NULL : &E.row[filerow+1];

switch(key) {
case ARROW_LEFT:
if (E.cx == 0) {
if (E.cx <= 0) {
if (E.coloff) {
E.coloff--;
} else {
Expand All @@ -1135,6 +1158,9 @@ void editorMoveCursor(int key) {
}
break;
case ARROW_RIGHT:
if(E.cx < 0){
E.cx = 0;
}
if (row && filecol < row->size) {
if (E.cx == E.screencols-1) {
E.coloff++;
Expand All @@ -1156,6 +1182,18 @@ void editorMoveCursor(int key) {
if (E.rowoff) E.rowoff--;
} else {
E.cy -= 1;
int tabs = 0, offset = 0, n = 0;
for (int j = 0; j < filecol; j++){
if (row->chars[j] == TAB) {
tabs++;
}
}
for (int j = 0; j < filecol; j++){
if (rowP->chars[j] == TAB/* && tabs >= 0*/) {
tabs--;
}
}
E.cx += tabs*(TAB_SIZE-1);
}
break;
case ARROW_DOWN:
Expand All @@ -1165,6 +1203,18 @@ void editorMoveCursor(int key) {
} else {
E.cy += 1;
}
int tabs = 0;
for (int j = 0; j < filecol; j++){
if (row->chars[j] == TAB) {
tabs++;
}
}
for (int j = 0; j < filecol; j++){
if (rowF->chars[j] == TAB/* && tabs >= 0*/) {
tabs--;
}
}
E.cx += tabs*(TAB_SIZE-1);
}
break;
}
Expand Down Expand Up @@ -1215,11 +1265,19 @@ void editorProcessKeypress(int fd) {
case CTRL_F:
editorFind(fd);
break;
case DEL_KEY:
editorInvDelChar();
break;
case BACKSPACE: /* Backspace */
case CTRL_H: /* Ctrl-h */
case DEL_KEY:
editorDelChar();
break;
case END_KEY:
E.cx = E.row[E.rowoff+E.cy].size;
break;
case HOME_KEY:
E.cx = 0;
break;
case PAGE_UP:
case PAGE_DOWN:
if (c == PAGE_UP && E.cy != 0)
Expand Down