Refreshing and No more blinking cursor
Cursor will now be hollow if you're not focused on the window and the refreshing of the terminal makes the cursor not freak out + some visual bugs **should** be fixed. Htop and vim are not going to work still unfortunately.
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Rekketstone
parent
347ac2948c
commit
a04a1870cc
@ -2,7 +2,7 @@
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What the hell is a cowmonk?
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## What is cowterm?
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cowterm is a really simple terminal that is written in pure C, using gtk. I don't recommend anyone seriously using this.
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cowterm is a really simple terminal that is written in pure C, using Xorg Libraries. I don't recommend anyone seriously using this.
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If you wish to, then good luck I guess? Here are some features that are in cowterm:
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- You can kill processes in it using Ctrl+C
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- Yes, this had to be manually implemented
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@ -30,7 +30,6 @@ Here are some ~~downsides~~ upsides to using cowterm:
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- C compiler (gcc or clang)
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- C libraries
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- Xorg Libs (xfont, xutil, and xlibs)
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- GTK 3.0
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### Compilation & Installation
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The steps are very simple, nothing like you've never seen before:
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13
config.h
13
config.h
@ -1,6 +1,10 @@
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#ifndef CONFIG_H_
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#define CONFIG_H_
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// 60 Hz refresh rate = 1/60 = 0.0166666... seconds = 16666 microseconds
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// Change as suited for your monitor
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#define REFRESH_INTERVAL 16666
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// Colors are just configured like RBG, if you don't recognize
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// this color format, search it up and find it out yourself
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static const unsigned long int RED = 0xFF0000;
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@ -25,9 +29,12 @@ static const unsigned long int LIGHT_CYAN = 0x80FFFF;
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// "-adobe-courier-medium-r-normal--14-140-75-75-m-90-iso8859-1"
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// "-bitstream-terminal-medium-r-normal--18-140-100-100-c-110-iso8859-1"
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// Use 'xlsfonts' command to list available fonts
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static const char REGULAR_FONT[] = "-misc-fixed-medium-r-normal--13-120-75-75-c-70-iso8859-1";
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static const char BOLD_FONT[] = "-misc-fixed-bold-r-normal--13-120-75-75-c-70-iso8859-1";
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static const char ITALICS_FONT[] = "-misc-fixed-medium-o-normal--13-120-75-75-c-70-iso8859-1";
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static const char REGULAR_FONT[] =
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"-misc-fixed-medium-r-normal--13-120-75-75-c-70-iso8859-1";
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static const char BOLD_FONT[] =
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"-misc-fixed-bold-r-normal--13-120-75-75-c-70-iso8859-1";
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static const char ITALICS_FONT[] =
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"-misc-fixed-medium-o-normal--13-120-75-75-c-70-iso8859-1";
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// Change the window name to whatever you want lmao
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static const char window_name[] = "CowTerm";
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@ -4,8 +4,8 @@
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PREFIX = /usr/local/
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# includes and libs
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FREETYPELIBS = -lfontconfig -lXft
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FREETYPEINC = /usr/include/freetype2
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#FREETYPELIBS = -lfontconfig -lXft
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#FREETYPEINC = /usr/include/freetype2
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INCS = -I/usr/X11R6/include -I${FREETYPEINC}
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LIBS = -L/usr/X11R6/lib -lX11 -lutil ${FREETYPELIBS}
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131
cowterm.c
131
cowterm.c
@ -22,7 +22,6 @@
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#define MAX_COLS 1000
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#define CHAR_WIDTH 8
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#define CHAR_HEIGHT 16
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#define CURSOR_BLINK_INTERVAL 500000 // 500ms in microseconds
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static pid_t child_pid;
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static char **terminal_buffer = NULL;
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@ -39,11 +38,14 @@ static GC gc_bold = NULL;
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static Display *display = NULL;
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static int cursor_visible = 1;
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static struct timeval last_blink;
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static struct timeval last_refresh;
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static Pixmap buffer_pixmap = None;
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static int master_fd = -1;
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static int needs_refresh = 0;
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static XFontStruct *regular_font = NULL;
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static XFontStruct *bold_font = NULL;
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static XFontStruct *italic_font = NULL;
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static int window_focused = 0;
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#define ATTR_BOLD 1
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#define ATTR_ITALIC 2
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@ -67,26 +69,31 @@ static void draw_cursor(Display *display, Window window) {
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// Save original color
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unsigned long original_color = color_buffer[cursor_y][cursor_x];
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// Draw inverted cursor background
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XSetForeground(display, gc, original_color);
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XFillRectangle(display, buffer_pixmap, gc, cursor_x * CHAR_WIDTH,
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cursor_y * CHAR_HEIGHT, CHAR_WIDTH, CHAR_HEIGHT);
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if (!window_focused) {
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XSetForeground(display, gc, original_color);
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XDrawRectangle(display, buffer_pixmap, gc, cursor_x * CHAR_WIDTH,
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cursor_y * CHAR_HEIGHT, CHAR_WIDTH - 1, CHAR_HEIGHT - 1);
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} else {
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XSetForeground(display, gc, original_color);
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XFillRectangle(display, buffer_pixmap, gc, cursor_x * CHAR_WIDTH,
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cursor_y * CHAR_HEIGHT, CHAR_WIDTH, CHAR_HEIGHT);
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// Draw the character in inverted color
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if (cursor_x < term_cols && cursor_y < term_rows) {
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char str[2] = {terminal_buffer[cursor_y][cursor_x], '\0'};
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XSetForeground(display, gc, XBlackPixel(display, DefaultScreen(display)));
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if (cursor_x < term_cols && cursor_y < term_rows) {
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char str[2] = {terminal_buffer[cursor_y][cursor_x], '\0'};
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XSetForeground(display, gc,
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XBlackPixel(display, DefaultScreen(display)));
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XFontStruct *font = regular_font;
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if (attr_buffer[cursor_y][cursor_x] & ATTR_BOLD) {
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font = bold_font;
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} else if (attr_buffer[cursor_y][cursor_x] & ATTR_ITALIC) {
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font = italic_font;
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XFontStruct *font = regular_font;
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if (attr_buffer[cursor_y][cursor_x] & ATTR_BOLD) {
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font = bold_font;
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} else if (attr_buffer[cursor_y][cursor_x] & ATTR_ITALIC) {
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font = italic_font;
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}
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XSetFont(display, gc, font->fid);
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XDrawString(display, buffer_pixmap, gc, cursor_x * CHAR_WIDTH,
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(cursor_y + 1) * CHAR_HEIGHT - 2, str, 1);
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}
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XSetFont(display, gc, font->fid);
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XDrawString(display, buffer_pixmap, gc, cursor_x * CHAR_WIDTH,
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(cursor_y + 1) * CHAR_HEIGHT - 2, str, 1);
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}
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}
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@ -96,18 +103,10 @@ static void draw_cursor(Display *display, Window window) {
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cursor_x * CHAR_WIDTH, cursor_y * CHAR_HEIGHT);
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}
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static void update_cursor_blink(Display *display, Window window) {
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struct timeval now;
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gettimeofday(&now, NULL);
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long elapsed = (now.tv_sec - last_blink.tv_sec) * 1000000 +
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(now.tv_usec - last_blink.tv_usec);
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if (elapsed >= CURSOR_BLINK_INTERVAL) {
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cursor_visible = !cursor_visible;
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last_blink = now;
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draw_cursor(display, window);
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XFlush(display);
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static void update_cursor_state(Display *display, Window window) {
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if (window_focused) {
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cursor_visible = 1;
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return;
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}
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}
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@ -217,6 +216,7 @@ static void resize_buffers(int new_rows, int new_cols) {
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buffer_pixmap = XCreatePixmap(display, DefaultRootWindow(display),
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term_cols * CHAR_WIDTH, term_rows * CHAR_HEIGHT,
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DefaultDepth(display, DefaultScreen(display)));
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needs_refresh = 1;
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}
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static void destroy_cb(Display *display, Window window) {
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@ -286,12 +286,9 @@ static void draw_terminal(Display *display, Window window) {
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if (!gc) {
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gc = XCreateGC(display, window, 0, NULL);
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regular_font = XLoadQueryFont(
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display, REGULAR_FONT);
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bold_font = XLoadQueryFont(
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display, BOLD_FONT);
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italic_font = XLoadQueryFont(
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display, ITALICS_FONT);
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regular_font = XLoadQueryFont(display, REGULAR_FONT);
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bold_font = XLoadQueryFont(display, BOLD_FONT);
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italic_font = XLoadQueryFont(display, ITALICS_FONT);
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if (!regular_font)
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regular_font = XLoadQueryFont(display, "fixed");
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@ -325,6 +322,23 @@ static void draw_terminal(Display *display, Window window) {
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draw_cursor(display, window);
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XFlush(display);
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needs_refresh = 0;
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}
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static void check_refresh(Display *display, Window window) {
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if (!needs_refresh)
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return;
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struct timeval now;
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gettimeofday(&now, NULL);
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long elapsed = (now.tv_sec - last_refresh.tv_sec) * 1000000 +
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(now.tv_usec - last_refresh.tv_usec);
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if (elapsed >= REFRESH_INTERVAL) {
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draw_terminal(display, window);
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last_refresh = now;
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}
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}
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static void clear_terminal(Display *display, Window window) {
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@ -339,7 +353,7 @@ static void clear_terminal(Display *display, Window window) {
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}
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cursor_x = 0;
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cursor_y = 0;
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draw_terminal(display, window);
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needs_refresh = 1;
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}
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// Scroll the terminal up one line
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@ -358,6 +372,7 @@ static void scroll_up(void) {
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color_buffer[term_rows - 1][x] = current_color;
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attr_buffer[term_rows - 1][x] = current_attr;
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}
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needs_refresh = 1;
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}
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// Handles those pesky ANSI color escape codes that terminals use.
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@ -476,7 +491,7 @@ static int master_cb(int fd, void *data) {
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if (cursor_y >= term_rows) {
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scroll_up();
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cursor_y = term_rows - 1;
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draw_terminal(ctx->display, ctx->window);
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needs_refresh = 1;
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}
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} else if (buf[i] == '\r') {
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cursor_x = 0;
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@ -484,20 +499,14 @@ static int master_cb(int fd, void *data) {
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if (cursor_x > 0) {
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cursor_x--;
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terminal_buffer[cursor_y][cursor_x] = ' ';
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draw_char(ctx->display, buffer_pixmap, cursor_x, cursor_y);
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XCopyArea(ctx->display, buffer_pixmap, ctx->window, gc,
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cursor_x * CHAR_WIDTH, cursor_y * CHAR_HEIGHT, CHAR_WIDTH,
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CHAR_HEIGHT, cursor_x * CHAR_WIDTH, cursor_y * CHAR_HEIGHT);
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needs_refresh = 1;
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}
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} else {
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if (cursor_y < term_rows && cursor_x < term_cols) {
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terminal_buffer[cursor_y][cursor_x] = buf[i];
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color_buffer[cursor_y][cursor_x] = current_color;
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attr_buffer[cursor_y][cursor_x] = current_attr;
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draw_char(ctx->display, buffer_pixmap, cursor_x, cursor_y);
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XCopyArea(ctx->display, buffer_pixmap, ctx->window, gc,
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cursor_x * CHAR_WIDTH, cursor_y * CHAR_HEIGHT, CHAR_WIDTH,
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CHAR_HEIGHT, cursor_x * CHAR_WIDTH, cursor_y * CHAR_HEIGHT);
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needs_refresh = 1;
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cursor_x++;
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if (cursor_x >= term_cols) {
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cursor_x = 0;
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@ -505,15 +514,19 @@ static int master_cb(int fd, void *data) {
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if (cursor_y >= term_rows) {
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scroll_up();
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cursor_y = term_rows - 1;
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draw_terminal(ctx->display, ctx->window);
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needs_refresh = 1;
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}
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}
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}
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}
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}
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cursor_visible = 1;
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draw_cursor(ctx->display, ctx->window);
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XFlush(ctx->display);
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if (needs_refresh) {
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check_refresh(ctx->display, ctx->window);
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} else {
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draw_cursor(ctx->display, ctx->window);
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XFlush(ctx->display);
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}
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}
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return 1;
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}
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@ -562,6 +575,7 @@ int main(void) {
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term_cols = 80;
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gettimeofday(&last_blink, NULL);
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gettimeofday(&last_refresh, NULL);
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struct winsize ws = {.ws_row = term_rows,
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.ws_col = term_cols,
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@ -626,7 +640,8 @@ int main(void) {
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XSetWMNormalHints(display, window, &hints);
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XStoreName(display, window, window_name);
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XSelectInput(display, window,
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KeyPressMask | ExposureMask | StructureNotifyMask);
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KeyPressMask | ExposureMask | StructureNotifyMask |
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FocusChangeMask);
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XMapWindow(display, window);
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if (openpty(&master, &slave, NULL, NULL, &ws) == -1) {
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@ -700,24 +715,34 @@ int main(void) {
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}
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break;
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}
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case FocusIn:
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window_focused = 1;
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needs_refresh = 1;
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break;
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case FocusOut:
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window_focused = 0;
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needs_refresh = 1;
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break;
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case KeyPress:
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key_press_cb((XKeyEvent *)&event, &master);
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break;
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case Expose:
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draw_terminal(display, window);
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needs_refresh = 1;
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check_refresh(display, window);
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break;
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}
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}
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fd_set fds;
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struct timeval tv = {0, 100000}; // 100ms timeout for cursor blink
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struct timeval tv = {0, 1000}; // 1ms timeout for faster refresh
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FD_ZERO(&fds);
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FD_SET(master, &fds);
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if (select(master + 1, &fds, NULL, NULL, &tv) > 0) {
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master_cb(master, &ctx);
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}
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update_cursor_blink(display, window);
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check_refresh(display, window);
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update_cursor_state(display, window);
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}
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return 0;
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