selk | Keyboard-only rectangle selector for X |
| download: https://git.y1.nz/archives/selk.tar.gz | |
| README | Files | Log | Refs | LICENSE |
commit 90a7d76fb6a6a9f614dd8f1213dbf710a7c46b4b parent 0aee9ed3d766d3234f5793eddcebb6e39246f165 Author: Emma Weaver <emma@waeaves.com> Date: Mon, 20 Apr 2026 16:29:00 -0400 merged and massively refactored selx into draw module Diffstat:
| M | LICENSE | 712 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----- |
| M | Makefile | 28 | ++++++++++++++++++---------- |
| M | README | 5 | +++++ |
| M | bmp.c | 1 | + |
| M | config.default.h | 4 | +++- |
| M | config.mk | 14 | ++++---------- |
| M | draw.c | 274 | +++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------- |
| M | draw.h | 126 | +++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------- |
| A | grabs.1 | 165 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| D | main-draw.c | 9 | --------- |
| M | main.c | 1 | - |
| A | test-draw | 0 | |
| A | test-draw.c | 372 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| D | util.c | 37 | ------------------------------------- |
| D | util.h | 9 | --------- |
15 files changed, 1500 insertions(+), 257 deletions(-)
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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<https://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<https://www.gnu.org/licenses/why-not-lgpl.html>. diff --git a/Makefile b/Makefile @@ -1,19 +1,27 @@ - include config.mk -grabs: bmp.c bmp.h -grabs: config.h config.mk -grabs: main.c - cc main.c ${CFLAGS} ${LDFLAGS} -o grabs +CONFIGS = config.h config.mk + +grabs: main.c bmp.o draw.o util.o ${CONFIGS} + cc main.c bmp.o ${CFLAGS} ${LDFLAGS} -o grabs + +test-draw: test-draw.c draw.o ${CONFIGS} + cc test-draw.c draw.o ${CFLAGS} ${LDFLAGS} -o test-draw -draw: draw.c draw.h -draw: config.h config.mk -draw: main-draw.c - cc main-draw.c ${CFLAGS} ${LDFLAGS} -o draw +# TODO reimplement a test program of the bmp module + +bmp.o: bmp.c bmp.h ${CONFIGS} + cc -c bmp.c ${CFLAGS} ${LDFLAGS} -o bmp.o + +draw.o: draw.c draw.h ${CONFIGS} + cc -c draw.c ${CFLAGS} ${LDFLAGS} -o draw.o config.h: config.default.h cp config.default.h config.h +clean: + rm -f draw.o bmp.o util.o draw grabs + # dist: clean # mkdir -p st-$(VERSION) # cp -R FAQ LEGACY TODO LICENSE Makefile README config.mk\ @@ -30,5 +38,5 @@ config.h: config.default.h # chmod 644 $(DESTDIR)$(MANPREFIX)/man1/st.1 # tic -sx st.info -.PHONY: test draw clean +.PHONY: clean diff --git a/README b/README @@ -1,8 +1,13 @@ Grabs is a minimal screenshot program based on X11. +Credits: + - selx by NRK for the selection UI code + - me for cobbling things together. + TODO: - add vim-style keyboard controls and GUI for that - add "install" and "clean" directives like what dwm and st have - figure out a space-efficient way to record video + - this? https://github.com/lecram/gifenc/tree/master diff --git a/bmp.c b/bmp.c @@ -8,6 +8,7 @@ #include <stdio.h> #include <string.h> +#include "bmp.h" #define WRITE_BMP_U16(offset, value) \ header[offset + 0] = 0xff & (value >> 0); \ diff --git a/config.default.h b/config.default.h @@ -1,5 +1,7 @@ -/* grabs will segfault if you try to take a screenshot larger than this. */ #define MAX_SCREEN_WIDTH 1366 #define MAX_SCREEN_HEIGHT 768 +const char * line_color_name = "#ff3838"; +const int line_width = 3; + diff --git a/config.mk b/config.mk @@ -7,20 +7,14 @@ VERSION = 1.0 PREFIX = /usr/local MANPREFIX = ${PREFIX}/share/man -X11INC = /usr/X11R6/include -X11LIB = /usr/X11R6/lib - -FREETYPELIBS = -lfontconfig -lXft -FREETYPEINC = /usr/include/freetype2 - # includes and libs -INCS = -I${X11INC} -I${FREETYPEINC} -LIBS = -L${X11LIB} -lX11 ${FREETYPELIBS} +INCS = -I/usr/X11R6/include -I/usr/include/freetype2 +LIBS = -L/usr/X11R6/lib -lX11 -lfontconfig -lXft -lXrandr # flags -CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" +CPPFLAGS = "" #-D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" #CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS} -CFLAGS = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS} +CFLAGS = ${INCS} #-std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS} LDFLAGS = ${LIBS} # Solaris diff --git a/draw.c b/draw.c @@ -1,144 +1,222 @@ -/* See LICENSE file for copyright and license details. */ #include <stdio.h> #include <stdlib.h> -#include <string.h> #include <X11/Xlib.h> -#include <X11/Xft/Xft.h> +#include <X11/Xutil.h> #include "draw.h" -#include "util.h" -Draw * -draw_create(Display * display, int screen, Window root, unsigned int w, unsigned int h) +unsigned int +get_grab_mask() { - Draw * draw = ecalloc(1, sizeof(Draw)); - - draw->display = display; - draw->screen = screen; - draw->root = root; - draw->w = w; - draw->h = h; - draw->drawable = XCreatePixmap(display, root, w, h, DefaultDepth(display, screen)); - draw->gc = XCreateGC(display, root, 0, NULL); - XSetLineAttributes(display, draw->gc, 1, LineSolid, CapButt, JoinMiter); - - return draw; + return ButtonPressMask | PointerMotionMask; } void -draw_resize(Draw * draw, unsigned int w, unsigned int h) +draw_init(DrawContext *ctx, X11 *x11) { - if (!draw) - return; - - draw->w = w; - draw->h = h; - if (draw->drawable) - XFreePixmap(draw->display, draw->drawable); - draw->drawable = XCreatePixmap(draw->display, draw->root, w, h, DefaultDepth(draw->display, draw->screen)); + unsigned long mask = 0; + XSetWindowAttributes window_attributes; + + XColor color; + int color_alloc_ret = XAllocNamedColor( + x11->display, + DefaultColormap( + x11->display, + DefaultScreen(x11->display) + ), + ctx->color_name, + (XColor []) {0}, + &color + ); + if (!color_alloc_ret) + fatal("failed to allocate color."); + + window_attributes.override_redirect = True; + mask |= CWOverrideRedirect; + window_attributes.background_pixel = color.pixel; + mask |= CWBackPixel; + + window_attributes.event_mask = StructureNotifyMask; + /* window_attributes.event_mask |= ExposureMask; // NOTE: causes way too many expose events... */ + mask |= CWEventMask; + + for (int i = 0; i < ARRLEN(x11->window); ++i) { + x11->window[i] = XCreateWindow( + x11->display, + x11->root.window, + x11->root.x, + x11->root.y, + x11->root.w, + x11->root.h, + 0, + CopyFromParent, + InputOutput, + CopyFromParent, + mask, + &window_attributes + ); + char name[] = "selx0"; + name[ARRLEN(name) - 2] += i; + XClassHint classhint = { name, "selx" }; + XSetClassHint(x11->display, x11->window[i], &classhint); + } } void -draw_free(Draw * draw) +init(DrawContext * ctx, X11 * x11, Point cur) { - XFreePixmap(draw->display, draw->drawable); - XFreeGC(draw->display, draw->gc); - free(draw); + ctx->last = cur; + ctx->start = cur; + // start accepting motion events as well + XChangeActivePointerGrab( + x11->display, get_grab_mask(), x11->cross, CurrentTime + ); } void -draw_color_create(Draw * draw, ColorScheme * dest, const char * color_name) +actually_draw(DrawContext * ctx, X11 * x11, Point cur) { - if (!draw || !dest || !color_name) - return; - - if (!XftColorAllocName(draw->display, DefaultVisual(draw->display, draw->screen), - DefaultColormap(draw->display, draw->screen), - color_name, dest)) - die("error, cannot allocate color '%s'", color_name); + // TODO wtf does this do. Whyyyy do it this wayyyyyy + int * px = ((int [3]) { cur.x, ctx->start.x, cur.x }) + (ctx->start.x < cur.x); + int * py = ((int [3]) { cur.y, ctx->start.y, cur.y }) + (ctx->start.y < cur.y); + + // HACK: -/+1 to fix up the selection around the edges + int x = px[0] - (px[0] - 1 == x11->root.x); + int y = py[0] - (py[0] - 1 == x11->root.y); + px[1] = px[1] + (px[1] + 1 == x11->root.w); + py[1] = py[1] + (py[1] + 1 == x11->root.h); + int w = DIFF(x, px[1]); + int h = DIFF(y, py[1]); + + ctx->last = cur; + ctx->final = (Rect){ x, y, w, h }; + + { + int b = ctx->border_width; + Rect r[] = { + { x-b, y-b, w+b, b }, /* top */ + { x-b, y, b, h+b }, /* left */ + { x, y+h, w+b, b }, /* bottom */ + { x+w, y-b, b, h+b }, /* right */ + }; + for (int i = 0; i < ARRLEN(r); ++i) { + Rect *rp = r + i; + XMoveResizeWindow( + x11->display, x11->window[i], + rp->x, rp->y, rp->w, rp->h + ); + } + } + + if (ctx->state == STATE_INIT) { + LOG("[selx]: mapping" "\n"); + for (int i = 0; i < ARRLEN(x11->window); ++i) { + XMapWindow(x11->display, x11->window[i]); + } + ctx->state = STATE_DRAW; + } + + { + Cursor c = x11->dirs[((cur.x > ctx->start.x) << 1) | (cur.y > ctx->start.y)]; + XChangeActivePointerGrab(x11->display, get_grab_mask(), c, CurrentTime); + } + + XFlush(x11->display); } -/* Create color schemes. */ -ColorScheme * -draw_scheme_create(Draw * draw, const char * color_names[], size_t color_count) +void +clean(DrawContext * ctx, X11 * x11, int event) { - size_t i; - ColorScheme * ret; - - /* need at least two colors for a scheme */ - if (!draw || !color_names || color_count < 2 || !(ret = ecalloc(color_count, sizeof(ColorScheme)))) - return NULL; - - for (i = 0; i < color_count; i++) - draw_color_create(draw, &ret[i], color_names[i]); - return ret; + LOG("[selx]: DRAW_STATE_CLEAN" "\n"); + ASSERT(ctx->state >= STATE_INIT && ctx->state < STATE_EXIT_LOOP); + + for (int i = 0; i < ARRLEN(x11->window); ++i) + XDestroyWindow(x11->display, x11->window[i]); + + int destroyed = 0; + int unmapped = (ctx->state == STATE_INIT) ? 4 : 0; + for (XEvent event; !(destroyed == 4 && unmapped == 4); NOP()) { + XNextEvent(x11->display, &event); + for (int i = 0; i < ARRLEN(x11->window); ++i) switch(event.type) { // NOLINT(bugprone-switch*) + case DestroyNotify: + destroyed += (event.xdestroywindow.window == x11->window[i]); + break; + case UnmapNotify: + unmapped += (event.xunmap.window == x11->window[i]); + break; + } + } } void -draw_color_free(Draw * draw, ColorScheme * c) +swap(DrawContext * ctx, X11 * x11, Point * cur) { - if (!draw || !c) - return; - - /* c is typedef XftColor ColorScheme */ - XftColorFree( - draw->display, - DefaultVisual(draw->display, draw->screen), - DefaultColormap(draw->display, draw->screen), - c + LOG("[selx]: swap" "\n"); + Point tmp = * cur; + * cur = ctx->start; + ctx->start = tmp; + XWarpPointer( + x11->display, None, x11->root.window, 0, 0, 0, 0, + cur->x, cur->y ); } void -draw_scheme_free(Draw * draw, ColorScheme * scheme, size_t color_count) +handle_wait(DrawContext * ctx, X11 * x11, Point cur, int event) { - size_t i; + if (event == EVENT_CLICK) { + init(ctx, x11, cur); + ctx->state = STATE_INIT; + } - if (!draw || !scheme) - return; - - for (i = 0; i < color_count; i++) - draw_color_free(draw, &scheme[i]); - free(scheme); + if (event == EVENT_ABORT) + ctx->state = STATE_ABORT; } void -draw_setscheme(Draw * draw, ColorScheme * scheme) +handle_init(DrawContext * ctx, X11 * x11, Point cur, int event) { - if (draw) - draw->scheme = scheme; -} + if (event == EVENT_MOTION) + actually_draw(ctx, x11, cur); -void -draw_rect(Draw * draw, int x, int y, unsigned int w, unsigned int h, enum ColorSchemeIndex color) -{ - if (!draw || !draw->scheme) - return; - XSetForeground(draw->display, draw->gc, draw->scheme[color].pixel); - XFillRectangle(draw->display, draw->drawable, draw->gc, x, y, w, h); /* filled? */ - // XDrawRectangle(draw->display, draw->drawable, draw->gc, x, y, w - 1, h - 1); /* unfilled... */ + if (event == EVENT_ABORT || event == EVENT_CLICK) { + clean(ctx, x11, event); + ctx->state = STATE_ABORT; + } } void -draw_frame( - Draw * draw, - int x, int y, unsigned int w, unsigned int h, - int gx, int gy, unsigned int gw, unsigned int gh, - enum ColorSchemeIndex color -) +handle_draw(DrawContext * ctx, X11 * x11, Point cur, int event) { - draw_rect(draw, x, y, w, gy-y, color); /* top */ - draw_rect(draw, x, gy, gx-x, gh, color); /* left */ - draw_rect(draw, gx+gw, gy, x+w-(gx+gw), gh, color); /* right */ - draw_rect(draw, x, gy+gh, w, y+h-(gy+gh), color); /* bottom */ + if (event == EVENT_SWAP) { + swap(ctx, x11, &cur); + actually_draw(ctx, x11, cur); + } + + if (event == EVENT_MOTION) + actually_draw(ctx, x11, cur); + + if (event == EVENT_CLICK) { + actually_draw(ctx, x11, cur); + clean(ctx, x11, event); + ctx->state = STATE_RECT; + } + + if (event == EVENT_ABORT) { + clean(ctx, x11, event); + ctx->state = STATE_ABORT; + } } void -draw_map(Draw * draw, Window window, int x, int y, unsigned int w, unsigned int h) +draw(DrawContext * ctx, X11 * x11, Point cur, int event) { - if (!draw) - return; - - XCopyArea(draw->display, draw->drawable, window, draw->gc, x, y, w, h, x, y); - XSync(draw->display, False); + ASSERT(event >= EVENT_CLICK && event <= EVENT_ABORT); + + if (ctx->state == STATE_WAIT) + handle_wait(ctx, x11, cur, event); + else if (ctx->state == STATE_INIT) + handle_init(ctx, x11, cur, event); + else if (ctx->state == STATE_DRAW) + handle_draw(ctx, x11, cur, event); } diff --git a/draw.h b/draw.h @@ -1,48 +1,86 @@ -/* See LICENSE file for copyright and license details. */ +//////////////// macros -enum ColorSchemeIndex { - ForegroundColor, - BackgroundColor, - BorderColor -} ColorSchemeIndex; -typedef XftColor ColorScheme; +#define NOP() ((void)0) +#define DIFF(A, B) ((A) > (B) ? (A) - (B) : (B) - (A)) +#define SIZEOF(...) ((Size)sizeof(__VA_ARGS__)) +#define ARRLEN(...) (SIZEOF(__VA_ARGS__) / SIZEOF(0[__VA_ARGS__])) +#define ARREND(V) ((V) + ARRLEN(V)) +#define ASSERT(X) ((void)0) + +#define TRUE 1 +#define FALSE 0 + +#define LOG(...) printf(__VA_ARGS__) + +#define fatal(message) { fprintf(stderr, message); exit(1); } + +//////////////// types + +typedef enum { + DRAW_STATE_INIT = 1 << 0, + DRAW_STATE_DRAW = 1 << 1, + DRAW_STATE_CLEAN = 1 << 2, + DRAW_STATE_FINISH = 1 << 3, + DRAW_STATE_ABORT = 1 << 4, + DRAW_STATE_SWAP = 1 << 5 +} DrawState; + +typedef enum { + FEATURE_WM_BORDER = 1 << 0, + FEATURE_KEYBOARD = 1 << 1, + FEATURE_MAUS = 1 << 2, + FEATURE_ROOT = 1 << 3, + FEATURE_CURSOR = 1 << 4, +} FeatureFlag; + +typedef enum { + STATE_WAIT, + STATE_INIT, + STATE_DRAW, + // terminating states. don't mess with the order of this + STATE_EXIT_LOOP, + STATE_RECT, + STATE_WINDOW, + STATE_MONITOR, + STATE_ABORT, +} State; + +enum { EVENT_CLICK, EVENT_MOTION, EVENT_SWAP, EVENT_ABORT }; + +typedef ptrdiff_t Size; + +typedef struct { int x, y; } Point; +typedef struct { int x, y, w, h; } Rect; typedef struct { - unsigned int w, h; Display * display; - int screen; - Window root; - Drawable drawable; - GC gc; - ColorScheme * scheme; -} Draw; - -/* Drawable abstraction */ -Draw * draw_create(Display * display, int screen, Window window, unsigned int w, unsigned int h); -void draw_resize(Draw * draw, unsigned int w, unsigned int h); -void draw_free(Draw * draw); - -/* Colorscheme abstraction */ -void draw_color_create(Draw * draw, ColorScheme * dest, const char * color_name); -void draw_color_free(Draw * draw, ColorScheme * c); -ColorScheme * draw_scheme_create(Draw * draw, const char * color_names[], size_t color_count); -void draw_scheme_free(Draw * draw, ColorScheme * scheme, size_t color_count); - -/* Drawing context manipulation */ -void draw_setscheme(Draw * draw, ColorScheme * scheme); - -/* Drawing functions */ -void draw_rect( - Draw * draw, - int x, int y, unsigned int w, unsigned int h, - enum ColorSchemeIndex color -); -void draw_frame( - Draw * draw, - int x, int y, unsigned int w, unsigned int h, - int gx, int gy, unsigned int gw, unsigned int gh, - enum ColorSchemeIndex color -); - -/* Map functions */ -void draw_map(Draw * draw, Window window, int x, int y, unsigned int w, unsigned int h); + struct { + Window window; + int x, y, w, h; + } root; + + Cursor cross; + Cursor dirs[4]; + + // shape + Window window[4]; +} X11; + +enum { MONITOR_UNDER_CURSOR = -64 }; +typedef struct { + Point start, last; + Rect final; + State state; + union { + Window window; + int monitor; + } target; + const char * color_name; + const int border_width; +} DrawContext; + +///////////////////////////////// functions + +void draw_init(DrawContext *ctx, X11 *x11); +void draw(DrawContext *ctx, X11 *x11, Point cur, int event); + diff --git a/grabs.1 b/grabs.1 @@ -0,0 +1,165 @@ +.TH SELX 1 "Feb 2026" "selx v2.0.0" +.SH NAME +selx - Minimal X11 selection tool +.SH SYNOPSIS +selx +.RB [ -Bkhv ] +.RB [ -b +.IR width ] +.RB [ -c +.IR color ] +.RB [ -f +.IR format-string ] +.RB [ -m +.IR monitor-index ] +.RB [ -w +.IR window-id ] + +.SH DESCRIPTION +.B selx +is a minimal X11 selection tool. +After a successful selection the selected area's dimension will be +printed to standard out (stdout) in the following format: +.BR "x,y,w,h" . + +.SH OPTIONS +.TP +.BR "-B, --keep-border" +Include the selected window's border in the selection. +.TP +.BI "-b, --border-width " "width" +Width of the selection border, must be within [0, 512]. +.TP +.BI "-c, --color " "<colorname|#hexcolor>" +Color of the selection border. +.TP +.BI "-f, --format " "format-string" +Change the default output format. +See FORMAT section for more details. +.TP +.BR "-k, --no-keyboard" +Disable keyboard. +.TP +.BI "-m, --monitor " "monitor-index" +Index of the monitor to select. +.TP +.BI "-w, --window " "window-id" +ID of the window to select. +.TP +.BR "-h, --help" +Show usage and exit. +.TP +.BR "-v, --version" +Show version and exit. + +.SH BINDINGS +.TP +.BR "Button1" , " Space" +Start and end the selection. +.TP +.BR "Button3" , " w" +If no selection is active, select the window under the cursor. +.TP +.BR "Control+Button3" , " Control+w" +If no selection is active, select the monitor under the cursor. +.TP +.BR "Button4" , " Button5" , " f" +If selection is active, swaps the pointer position. +This allows for re-adjusting the selection's starting point. +.TP +.BR "ESC" , " q" +Abort the selection. +.P +While selection is active pressing any mouse button, other than +.IR "Button1" , " Button4 " and " Button5" +will also abort the selection. +.TP +.BR ArrowLeft ", " ArrowRight ", " ArrowUp ", " ArrowDown ", " h ", " j ", " k ", " l +Moves the cursor by 16 pixels. +.B Control +modifier can be used to move by 1 pixel. +.B Shift +modifier can be used to move in bigger increments of 128 pixels. + +.SH FORMAT +The output format can be customized via the +.B -f +flag. +The format-string accepts specifiers that are expanded before outputting. +The following specifiers are supported: +.TP +.B "%x" +x coordinate. +.TP +.B "%y" +y coordinate. +.TP +.B "%w" +width. +.TP +.B "%h" +height. +.TP +.B "%W" +absolute coordinate of the width. +.TP +.B "%H" +absolute coordinate of the height. +.TP +.B "%i" +if a window was selected, then prints the window id in hex, otherwise prints nothing. +.TP +.B "%S" +short form of "%x,%y,%w,%h %i". +.TP +.B "%g" +print coordinates in standard X geometry format, equivalent to "%wx%h+%x+%y%n". +.TP +.B "%n" +a new-line. +.TP +.B "%%" +a literal percent-sign. +.P +For example "%x,%y,%w,%h%n" would be equivalent to the default output format. + +.SH EXAMPLES +.P +Selecting an area or window and then screenshotting it via +.BR sxot (1): +.IP +.EX +sxot -g "$(selx -f "%S" -B)" >out.ppm +.EE +.P +Shell script for selecting a region and then recording it with +.BR ffmpeg (1): +.IP +.EX +#!/bin/sh + +IFS=, read x y w h << EOF +$(selx) +EOF +[ -z "$h" ] && exit 1 # nothing selected +# pad to an even resolution since some output format do no accept odd res +even_w="$(( w + (w % 2) ))"; even_h="$(( h + (h % 2) ))"; + +ffmpeg -f x11grab -s "${w}x${h}" -i ":0.0+$x,$y" -c:v libx264 -an \\ + -framerate 30 -r 30 -threads "$(nproc)" -preset slow -tune zerolatency \\ + -vf "format=yuv422p, pad=w=${even_w}:h=${even_h}" -crf 18 \\ + "$HOME/videos/$(date "+%F_%T").mp4" +.EE + + +.SH AUTHORS +NRK <nrk@disroot.org> + +.SH BUGS +.SS "Reporting Bugs" +For reporting bugs, either open an issue under the Codeberg repo +<https://codeberg.org/NRK/selx> or send an email to <nrk@disroot.org>. + +.SH SEE ALSO +.BR sxot (1), +.BR ffmpeg (1) diff --git a/main-draw.c b/main-draw.c @@ -1,9 +0,0 @@ -#include <stdio.h> - -#include "draw.c" - -int -main() -{ - printf("Ran it. Nice!" "\n"); -} diff --git a/main.c b/main.c @@ -6,7 +6,6 @@ #include "config.h" #include "bmp.h" -#include "bmp.c" #define CANCEL(message) { fprintf(stderr, (message)); exit(1); } diff --git a/test-draw b/test-draw Binary files differ. diff --git a/test-draw.c b/test-draw.c @@ -0,0 +1,372 @@ +#include <limits.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <X11/keysym.h> +#include <X11/cursorfont.h> +#include <X11/extensions/Xrandr.h> + +#include "config.h" +#include "draw.h" + +const char * usage = "Usage: grabs" "\n"; +const uint32_t features = + FEATURE_KEYBOARD | FEATURE_MAUS | FEATURE_CURSOR | FEATURE_ROOT; + +void +do_window(DrawContext * ctx, Point p, XEvent event) +{ + if (ctx->state != STATE_WAIT) + return; + + if (event.xkey.state & ControlMask) { + ctx->state = STATE_MONITOR; + ctx->last = p; + ctx->target.monitor = MONITOR_UNDER_CURSOR; + return; + } + + ctx->state = STATE_WINDOW; + ctx->target.window = event.xkey.subwindow; + if (ctx->target.window == None) + ctx->target.window = event.xkey.root; +} + +void +handle_key_press(DrawContext * ctx, X11 * x11, XEvent event) +{ + KeySym keysym = XKeycodeToKeysym( + x11->display, event.xkey.keycode, 0 + ); + + Point p = { event.xkey.x, event.xkey.y }; + int control_pressed = event.xkey.state & ControlMask; + int shift_pressed = event.xkey.state & ShiftMask; + int delta = control_pressed ? 1 : (shift_pressed ? 128 : 16); + + switch (keysym) { + case XK_w: + do_window(ctx, p, event); + break; + + case XK_space: + draw(ctx, x11, p, EVENT_CLICK); + break; + + case XK_f: + draw(ctx, x11, p, EVENT_SWAP); + break; + + case XK_q: + case XK_Escape: + draw(ctx, x11, p, EVENT_ABORT); + break; + + case XK_h: + case XK_Left: + p.x -= delta; + break; + + case XK_l: + case XK_Right: + p.x += delta; + break; + + case XK_k: + case XK_Up: + p.y -= delta; + break; + + case XK_j: + case XK_Down: + p.y += delta; + break; + } + + if ( + p.x != event.xkey.x_root || + p.y != event.xkey.y_root + ) + XWarpPointer( + x11->display, None, x11->root.window, + 0, 0, 0, 0, + p.x, p.y + ); +} + +void +handle_button_press(DrawContext * ctx, X11 * x11, XEvent event) +{ + int btn = event.xbutton.button; + Point p = { event.xbutton.x, event.xbutton.y }; + + if (btn == Button1) { + draw(ctx, x11, p, EVENT_CLICK); + return; + } + + if (btn == Button3 && ctx->state == STATE_WAIT) { + // this is kinda bad right...? + int control_pressed = event.xbutton.state & ControlMask; + if (control_pressed) { + ctx->state = STATE_MONITOR; + ctx->last = p; + ctx->target.monitor = MONITOR_UNDER_CURSOR; + } else { + ctx->state = STATE_WINDOW; + ctx->target.window = event.xbutton.subwindow; + if (ctx->target.window == None) + ctx->target.window = event.xbutton.root; + } + return; + } + + if ((btn == Button4 || btn == Button5) && ctx->state == STATE_DRAW) { + draw(ctx, x11, p, EVENT_SWAP); + return; + } + + draw(ctx, x11, p, EVENT_ABORT); +} + +void +handle_motion_notify(DrawContext * ctx, X11 * x11, XEvent event, int * queued) +{ + Point p = { event.xmotion.x, event.xmotion.y }; + int ndiscarded = 0; + + for (int n = 0; n > 0 || (n = XPending(x11->display)) > 0; --n) { + XNextEvent(x11->display, &event); + if (event.type == MotionNotify) { + p = (Point) { event.xmotion.x, event.xmotion.y }; + ndiscarded++; + } else { + * queued = TRUE; + LOG("[selx]: queuing event" "\n"); + break; + } + } + + if (ndiscarded) + LOG("[selx]: discarded %d stale MotionNotify event" "\n", ndiscarded); + + draw(ctx, x11, p, EVENT_MOTION); +} + +int +main() +{ + X11 x11; + DrawContext ctx = { + .color_name = line_color_name, + .border_width = line_width, + }; + + if (FALSE) { /* window mode */ + // ctx.state = STATE_WINDOW; + // ctx.target.window = <WINDOW ID>; + // features = FEATURE_ROOT; + } + + if (FALSE) { /* monitor mode */ + // ctx.state = STATE_MONITOR; + // ctx.target.monitor = <MONITOR ID>; + // features = FEATURE_ROOT; + } + + x11.display = XOpenDisplay(NULL); + if (x11.display == NULL) + fatal("failed to open X display"); + + if (features & FEATURE_ROOT) { + XWindowAttributes attributes; + x11.root.window = DefaultRootWindow(x11.display); + + int get_attributes_ret = XGetWindowAttributes( + x11.display, + x11.root.window, + &attributes + ); + if (get_attributes_ret == 0) + fatal("XGetWindowAttributes() failed"); + + x11.root.x = attributes.x; + x11.root.y = attributes.y; + x11.root.w = attributes.width; + x11.root.h = attributes.height; + } + + if (features & FEATURE_CURSOR) { + x11.dirs[0x0] = XCreateFontCursor(x11.display, XC_ul_angle); + x11.dirs[0x1] = XCreateFontCursor(x11.display, XC_ll_angle); + x11.dirs[0x2] = XCreateFontCursor(x11.display, XC_ur_angle); + x11.dirs[0x3] = XCreateFontCursor(x11.display, XC_lr_angle); + } + + if (features & FEATURE_KEYBOARD) { + /* when launched via dwm keybinding, it fails the grab since + * dwm has it grabbed already. listen for FocusChangeMask and + * keep retrying. */ + int res; + XSelectInput(x11.display, x11.root.window, FocusChangeMask); + do { + res = XGrabKeyboard( + x11.display, x11.root.window, 0, + GrabModeAsync, GrabModeAsync, CurrentTime + ); + XEvent junk; + XNextEvent(x11.display, &junk); + } while (res == AlreadyGrabbed); + XSelectInput(x11.display, x11.root.window, 0x0); + + if (res != GrabSuccess) + fatal("failed to grab keyboard"); + } + + if (features & FEATURE_MAUS) { + x11.cross = XCreateFontCursor(x11.display, XC_cross); + int res = XGrabPointer( + x11.display, x11.root.window, 0, + ButtonPressMask, GrabModeAsync, + GrabModeAsync, x11.root.window, x11.cross, CurrentTime + ); + + if (res != GrabSuccess) + fatal("failed to grab cursor"); + } + + draw_init(&ctx, &x11); + + int queued = FALSE; + for (XEvent event; ctx.state < STATE_EXIT_LOOP; NOP()) { + if (!queued) + XNextEvent(x11.display, &event); + queued = FALSE; + + switch (event.type) { + case KeyPress: + handle_key_press(&ctx, &x11, event); + break; + + case ButtonPress: + handle_button_press(&ctx, &x11, event); + break; + + case MotionNotify: + handle_motion_notify(&ctx, &x11, event, &queued); + break; + + case Expose: + LOG("[selx]: Expose..." "\n"); + draw(&ctx, &x11, ctx.last, EVENT_MOTION); + break; + + case DestroyNotify: + fatal("received DestroyNotify" "\n"); + break; + + case KeyRelease: /* FALLTHROUGH */ + case MapNotify: /* FALLTHROUGH */ + case ConfigureNotify: + /* nothing lol */ + break; + + default: + LOG("[selx]: Event(%d)..." "\n", event.type); + break; + } + } + + if (features & FEATURE_MAUS) + XUngrabPointer(x11.display, CurrentTime); + + if (features & FEATURE_KEYBOARD) + XUngrabKeyboard(x11.display, CurrentTime); + + // TODO: this executes even when the target window is not visible. + // should we skip in those cases instead? + if (ctx.state == STATE_WINDOW) { + XWindowAttributes window_attributes; + int get_attributes_ret = XGetWindowAttributes( + x11.display, + ctx.target.window, + &window_attributes + ); + + if (get_attributes_ret == 0) + fatal("XGetWindowAttributes() failed"); + + int b = window_attributes.border_width; + ctx.final = (Rect) { + window_attributes.x, window_attributes.y, + window_attributes.width, window_attributes.height + }; + + if (features & FEATURE_WM_BORDER) { + ctx.final.w += b * 2; + ctx.final.h += b * 2; + } else { + ctx.final.x += b; + ctx.final.y += b; + } + ASSERT(features & FEATURE_ROOT); + } else if (ctx.state == STATE_MONITOR) { + int nmonitors; + ASSERT(features & FEATURE_ROOT); + XRRMonitorInfo *monitors = XRRGetMonitors( + x11.display, x11.root.window, True, &nmonitors + ); + + if (monitors == NULL) + fatal("XRRGetMonitors() failed"); + + if (ctx.target.monitor == MONITOR_UNDER_CURSOR) { // clicked + Point *cur = &ctx.last; + for (Size i = 0; i < nmonitors; ++i) { + XRRMonitorInfo *m = monitors + i; + if ( + (cur->x >= m->x && cur->x < (m->x + m->width)) && + (cur->y >= m->y && cur->y < (m->y + m->height)) + ) { + ctx.target.monitor = i; + break; + } + } + } + + if (ctx.target.monitor >= nmonitors) + fatal("no monitor with such index"); + + if (ctx.target.monitor == MONITOR_UNDER_CURSOR) + fatal("couldn't find the monitor under the cursor"); + + ASSERT(ctx.target.monitor >= 0 && ctx.target.monitor < nmonitors); + XRRMonitorInfo *m = monitors + ctx.target.monitor; + ctx.final.x = m->x; + ctx.final.y = m->y; + ctx.final.h = m->height; + ctx.final.w = m->width; + } + + if (ctx.state != STATE_ABORT && ctx.final.w > 0 && ctx.final.h > 0) { + ASSERT( + ctx.state == STATE_WINDOW || + ctx.state == STATE_MONITOR || + ctx.state == STATE_RECT + ); + Rect *r = &ctx.final; + printf("%d %d %d %d" "\n", r->x, r->y, r->w, r->h); + } + + XCloseDisplay(x11.display); + + return 0; +} + diff --git a/util.c b/util.c @@ -1,37 +0,0 @@ -/* See LICENSE file for copyright and license details. */ -#include <errno.h> -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "util.h" - -void -die(const char *fmt, ...) -{ - va_list ap; - int saved_errno; - - saved_errno = errno; - - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - va_end(ap); - - if (fmt[0] && fmt[strlen(fmt)-1] == ':') - fprintf(stderr, " %s", strerror(saved_errno)); - fputc('\n', stderr); - - exit(1); -} - -void * -ecalloc(size_t nmemb, size_t size) -{ - void *p; - - if (!(p = calloc(nmemb, size))) - die("calloc:"); - return p; -} diff --git a/util.h b/util.h @@ -1,9 +0,0 @@ -/* See LICENSE file for copyright and license details. */ - -#define MAX(A, B) ((A) > (B) ? (A) : (B)) -#define MIN(A, B) ((A) < (B) ? (A) : (B)) -#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B)) -#define LENGTH(X) (sizeof (X) / sizeof (X)[0]) - -void die(const char *fmt, ...); -void *ecalloc(size_t nmemb, size_t size);
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