nsxiv/window.c
NRK 6578e6eb65 code-style: various cleanups (#356)
* run_key_handler: make the logic easier to follow
* remove timeout_t
  the typedef is not needed. inline the declaration similar to the other
  static structs.
* simplify estrdup
  reuse emalloc, instead of calling malloc and null-checking.
* win_clear: initialize `e` right away
* process_bindings: explicitly check against NULL
  most pointer checks in the codebase do explicit check.
* use a named constant instead of magic number
  also changes the padding from 3 to 4 bytes according to [0]. but i
  couldn't find any situtation where this mattered, so perhaps the current
  padding is enough. but doesn't hurt adding one more byte.

[0]: https://nullprogram.com/blog/2017/10/06/

Reviewed-on: https://codeberg.org/nsxiv/nsxiv/pulls/356
Reviewed-by: explosion-mental <explosion-mental@noreply.codeberg.org>
2022-08-16 10:53:05 +02:00

541 lines
14 KiB
C

/* Copyright 2011-2020 Bert Muennich
* Copyright 2021-2022 nsxiv contributors
*
* This file is a part of nsxiv.
*
* nsxiv 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 2 of the License,
* or (at your option) any later version.
*
* nsxiv 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 nsxiv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "nsxiv.h"
#define INCLUDE_WINDOW_CONFIG
#include "config.h"
#include "icon/data.h"
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/Xatom.h>
#include <X11/Xresource.h>
#include <X11/cursorfont.h>
#if HAVE_LIBFONTS
#include "utf8.h"
#define UTF8_PADDING 4 /* utf8_decode requires 4 bytes of zero padding */
static XftFont *font;
static double fontsize;
#define TEXTWIDTH(win, text, len) \
win_draw_text(win, NULL, NULL, 0, 0, text, len, 0)
#endif
#define RES_CLASS "Nsxiv"
#define INIT_ATOM_(atom) \
atoms[ATOM_##atom] = XInternAtom(e->dpy, #atom, False);
enum {
H_TEXT_PAD = 5,
V_TEXT_PAD = 1
};
static struct {
int name;
Cursor icon;
} cursors[CURSOR_COUNT] = {
{ XC_left_ptr }, { XC_dotbox }, { XC_fleur }, { XC_watch },
{ XC_sb_left_arrow }, { XC_sb_right_arrow }
};
static GC gc;
static int barheight;
Atom atoms[ATOM_COUNT];
#if HAVE_LIBFONTS
static void win_init_font(const win_env_t *e, const char *fontstr)
{
int fontheight = 0;
if ((font = XftFontOpenName(e->dpy, e->scr, fontstr)) == NULL)
error(EXIT_FAILURE, 0, "Error loading font '%s'", fontstr);
fontheight = font->ascent + font->descent;
FcPatternGetDouble(font->pattern, FC_SIZE, 0, &fontsize);
barheight = fontheight + 2 * V_TEXT_PAD;
}
static void xft_alloc_color(const win_env_t *e, const char *name, XftColor *col)
{
if (!XftColorAllocName(e->dpy, e->vis, e->cmap, name, col))
error(EXIT_FAILURE, 0, "Error allocating color '%s'", name);
}
#endif /* HAVE_LIBFONTS */
static void win_alloc_color(const win_env_t *e, const char *name, XColor *col)
{
XColor screen;
if (!XAllocNamedColor(e->dpy, e->cmap, name, &screen, col))
error(EXIT_FAILURE, 0, "Error allocating color '%s'", name);
}
static const char* win_res(XrmDatabase db, const char *name, const char *def)
{
char *type;
XrmValue ret;
if (db != NULL &&
XrmGetResource(db, name, name, &type, &ret) &&
STREQ(type, "String") && *ret.addr != '\0')
{
return ret.addr;
} else {
return def;
}
}
void win_init(win_t *win)
{
win_env_t *e;
const char *win_bg, *win_fg, *mrk_fg;
char *res_man;
XrmDatabase db;
#if HAVE_LIBFONTS
const char *bar_fg, *bar_bg, *f;
static char lbuf[512 + UTF8_PADDING], rbuf[64 + UTF8_PADDING];
#endif
memset(win, 0, sizeof(win_t));
e = &win->env;
if ((e->dpy = XOpenDisplay(NULL)) == NULL)
error(EXIT_FAILURE, 0, "Error opening X display");
e->scr = DefaultScreen(e->dpy);
e->scrw = DisplayWidth(e->dpy, e->scr);
e->scrh = DisplayHeight(e->dpy, e->scr);
e->depth = DefaultDepth(e->dpy, e->scr);
e->vis = DefaultVisual(e->dpy, e->scr);
e->cmap = DefaultColormap(e->dpy, e->scr);
if (setlocale(LC_CTYPE, "") == NULL || XSupportsLocale() == 0)
error(0, 0, "No locale support");
XrmInitialize();
res_man = XResourceManagerString(e->dpy);
db = res_man == NULL ? NULL : XrmGetStringDatabase(res_man);
win_bg = win_res(db, RES_CLASS ".window.background", DEFAULT_WIN_BG);
win_fg = win_res(db, RES_CLASS ".window.foreground", DEFAULT_WIN_FG);
mrk_fg = win_res(db, RES_CLASS ".mark.foreground", DEFAULT_MARK_COLOR ? DEFAULT_MARK_COLOR : win_fg);
win_alloc_color(e, win_bg, &win->win_bg);
win_alloc_color(e, win_fg, &win->win_fg);
win_alloc_color(e, mrk_fg, &win->mrk_fg);
#if HAVE_LIBFONTS
bar_bg = win_res(db, RES_CLASS ".bar.background", DEFAULT_BAR_BG ? DEFAULT_BAR_BG : win_bg);
bar_fg = win_res(db, RES_CLASS ".bar.foreground", DEFAULT_BAR_FG ? DEFAULT_BAR_FG : win_fg);
xft_alloc_color(e, bar_bg, &win->bar_bg);
xft_alloc_color(e, bar_fg, &win->bar_fg);
f = win_res(db, RES_CLASS ".bar.font", DEFAULT_FONT);
win_init_font(e, f);
win->bar.l.buf = lbuf;
win->bar.r.buf = rbuf;
win->bar.l.size = sizeof(lbuf) - UTF8_PADDING;
win->bar.r.size = sizeof(rbuf) - UTF8_PADDING;
win->bar.h = options->hide_bar ? 0 : barheight;
win->bar.top = TOP_STATUSBAR;
#endif /* HAVE_LIBFONTS */
XrmDestroyDatabase(db);
INIT_ATOM_(WM_DELETE_WINDOW);
INIT_ATOM_(_NET_WM_NAME);
INIT_ATOM_(_NET_WM_ICON_NAME);
INIT_ATOM_(_NET_WM_ICON);
INIT_ATOM_(_NET_WM_STATE);
INIT_ATOM_(_NET_WM_PID);
INIT_ATOM_(_NET_WM_STATE_FULLSCREEN);
INIT_ATOM_(UTF8_STRING);
INIT_ATOM_(WM_NAME);
INIT_ATOM_(WM_ICON_NAME);
}
void win_open(win_t *win)
{
int c, i, j, n;
Window parent;
win_env_t *e;
XClassHint classhint;
unsigned long *icon_data;
XColor col;
Cursor *cnone = &cursors[CURSOR_NONE].icon;
char none_data[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
Pixmap none;
int gmask;
XSizeHints sizehints;
XWMHints hints;
long pid;
char hostname[256];
XSetWindowAttributes attrs;
char res_class[] = RES_CLASS;
char res_name[] = "nsxiv";
e = &win->env;
parent = options->embed ? options->embed : RootWindow(e->dpy, e->scr);
sizehints.flags = PWinGravity;
sizehints.win_gravity = NorthWestGravity;
/* determine window offsets, width & height */
if (options->geometry == NULL)
gmask = 0;
else
gmask = XParseGeometry(options->geometry, &win->x, &win->y,
&win->w, &win->h);
if (gmask & WidthValue)
sizehints.flags |= USSize;
else
win->w = WIN_WIDTH;
if (gmask & HeightValue)
sizehints.flags |= USSize;
else
win->h = WIN_HEIGHT;
if (gmask & XValue) {
if (gmask & XNegative) {
win->x += e->scrw - win->w;
sizehints.win_gravity = NorthEastGravity;
}
sizehints.flags |= USPosition;
} else {
win->x = 0;
}
if (gmask & YValue) {
if (gmask & YNegative) {
win->y += e->scrh - win->h;
sizehints.win_gravity = sizehints.win_gravity == NorthEastGravity
? SouthEastGravity : SouthWestGravity;
}
sizehints.flags |= USPosition;
} else {
win->y = 0;
}
attrs.colormap = e->cmap;
attrs.border_pixel = 0;
win->xwin = XCreateWindow(e->dpy, parent, win->x, win->y, win->w, win->h, 0,
e->depth, InputOutput, e->vis,
CWColormap | CWBorderPixel, &attrs);
if (win->xwin == None)
error(EXIT_FAILURE, 0, "Error creating X window");
/* set the _NET_WM_PID */
pid = getpid();
XChangeProperty(e->dpy, win->xwin, atoms[ATOM__NET_WM_PID], XA_CARDINAL,
32, PropModeReplace, (unsigned char *) &pid, 1);
if (gethostname(hostname, ARRLEN(hostname)) == 0) {
XTextProperty tp;
tp.value = (unsigned char *)hostname;
tp.nitems = strnlen(hostname, ARRLEN(hostname));
tp.encoding = XA_STRING;
tp.format = 8;
XSetWMClientMachine(e->dpy, win->xwin, &tp);
}
XSelectInput(e->dpy, win->xwin,
ButtonReleaseMask | ButtonPressMask | KeyPressMask |
PointerMotionMask | StructureNotifyMask);
for (i = 0; i < (int)ARRLEN(cursors); i++) {
if (i != CURSOR_NONE)
cursors[i].icon = XCreateFontCursor(e->dpy, cursors[i].name);
}
if (XAllocNamedColor(e->dpy, e->cmap, "black", &col, &col) == 0)
error(EXIT_FAILURE, 0, "Error allocating color 'black'");
none = XCreateBitmapFromData(e->dpy, win->xwin, none_data, 8, 8);
*cnone = XCreatePixmapCursor(e->dpy, none, none, &col, &col, 0, 0);
gc = XCreateGC(e->dpy, win->xwin, 0, None);
n = icons[ARRLEN(icons)-1].size;
icon_data = emalloc((n * n + 2) * sizeof(*icon_data));
for (i = 0; i < (int)ARRLEN(icons); i++) {
n = 0;
icon_data[n++] = icons[i].size;
icon_data[n++] = icons[i].size;
for (j = 0; j < (int)icons[i].cnt; j++) {
for (c = icons[i].data[j] >> 4; c >= 0; c--)
icon_data[n++] = icon_colors[icons[i].data[j] & 0x0F];
}
XChangeProperty(e->dpy, win->xwin, atoms[ATOM__NET_WM_ICON], XA_CARDINAL, 32,
i == 0 ? PropModeReplace : PropModeAppend,
(unsigned char *) icon_data, n);
}
free(icon_data);
win_set_title(win, res_name, strlen(res_name));
classhint.res_class = res_class;
classhint.res_name = options->res_name != NULL ? options->res_name : res_name;
XSetClassHint(e->dpy, win->xwin, &classhint);
XSetWMProtocols(e->dpy, win->xwin, &atoms[ATOM_WM_DELETE_WINDOW], 1);
sizehints.width = win->w;
sizehints.height = win->h;
sizehints.x = win->x;
sizehints.y = win->y;
XSetWMNormalHints(win->env.dpy, win->xwin, &sizehints);
hints.flags = InputHint | StateHint;
hints.input = 1;
hints.initial_state = NormalState;
XSetWMHints(win->env.dpy, win->xwin, &hints);
if (options->fullscreen) {
XChangeProperty(e->dpy, win->xwin, atoms[ATOM__NET_WM_STATE],
XA_ATOM, 32, PropModeReplace,
(unsigned char *) &atoms[ATOM__NET_WM_STATE_FULLSCREEN], 1);
}
win->h -= win->bar.h;
win->buf.w = e->scrw;
win->buf.h = e->scrh;
win->buf.pm = XCreatePixmap(e->dpy, win->xwin, win->buf.w, win->buf.h, e->depth);
XSetForeground(e->dpy, gc, win->win_bg.pixel);
XFillRectangle(e->dpy, win->buf.pm, gc, 0, 0, win->buf.w, win->buf.h);
XSetWindowBackgroundPixmap(e->dpy, win->xwin, win->buf.pm);
XMapWindow(e->dpy, win->xwin);
XFlush(e->dpy);
}
CLEANUP void win_close(win_t *win)
{
unsigned int i;
for (i = 0; i < ARRLEN(cursors); i++)
XFreeCursor(win->env.dpy, cursors[i].icon);
XFreeGC(win->env.dpy, gc);
#if HAVE_LIBFONTS
XftFontClose(win->env.dpy, font);
#endif
XDestroyWindow(win->env.dpy, win->xwin);
XCloseDisplay(win->env.dpy);
}
bool win_configure(win_t *win, XConfigureEvent *c)
{
bool changed;
changed = win->w != (unsigned int)c->width || win->h + win->bar.h != (unsigned int)c->height;
win->x = c->x;
win->y = c->y;
win->w = c->width;
win->h = c->height - win->bar.h;
win->bw = c->border_width;
return changed;
}
void win_toggle_fullscreen(win_t *win)
{
XEvent ev;
XClientMessageEvent *cm;
memset(&ev, 0, sizeof(ev));
ev.type = ClientMessage;
cm = &ev.xclient;
cm->window = win->xwin;
cm->message_type = atoms[ATOM__NET_WM_STATE];
cm->format = 32;
cm->data.l[0] = 2; /* toggle */
cm->data.l[1] = atoms[ATOM__NET_WM_STATE_FULLSCREEN];
XSendEvent(win->env.dpy, DefaultRootWindow(win->env.dpy), False,
SubstructureNotifyMask | SubstructureRedirectMask, &ev);
}
void win_toggle_bar(win_t *win)
{
if (win->bar.h != 0) {
win->h += win->bar.h;
win->bar.h = 0;
} else {
win->bar.h = barheight;
win->h -= win->bar.h;
}
}
void win_clear(win_t *win)
{
win_env_t *e = &win->env;
if (win->w > win->buf.w || win->h + win->bar.h > win->buf.h) {
XFreePixmap(e->dpy, win->buf.pm);
win->buf.w = MAX(win->buf.w, win->w);
win->buf.h = MAX(win->buf.h, win->h + win->bar.h);
win->buf.pm = XCreatePixmap(e->dpy, win->xwin,
win->buf.w, win->buf.h, e->depth);
}
XSetForeground(e->dpy, gc, win->win_bg.pixel);
XFillRectangle(e->dpy, win->buf.pm, gc, 0, 0, win->buf.w, win->buf.h);
}
#if HAVE_LIBFONTS
static int win_draw_text(win_t *win, XftDraw *d, const XftColor *color,
int x, int y, char *text, int len, int w)
{
int err, tw = 0, warned = 0;
char *t, *next;
uint32_t rune;
XftFont *f;
FcCharSet *fccharset;
XGlyphInfo ext;
for (t = text; t - text < len; t = next) {
err = 0;
next = utf8_decode(t, &rune, &err);
if (err) {
if (!warned)
error(0, 0, "error decoding utf8 status-bar text");
warned = 1;
continue;
}
if (XftCharExists(win->env.dpy, font, rune)) {
f = font;
} else { /* fallback font */
fccharset = FcCharSetCreate();
FcCharSetAddChar(fccharset, rune);
f = XftFontOpen(win->env.dpy, win->env.scr, FC_CHARSET, FcTypeCharSet,
fccharset, FC_SCALABLE, FcTypeBool, FcTrue,
FC_SIZE, FcTypeDouble, fontsize, NULL);
FcCharSetDestroy(fccharset);
}
XftTextExtentsUtf8(win->env.dpy, f, (XftChar8*)t, next - t, &ext);
tw += ext.xOff;
if (tw <= w) {
XftDrawStringUtf8(d, color, f, x, y, (XftChar8*)t, next - t);
x += ext.xOff;
}
if (f != font)
XftFontClose(win->env.dpy, f);
}
return tw;
}
static void win_draw_bar(win_t *win)
{
int len, x, y, w, tw;
win_env_t *e;
win_bar_t *l, *r;
XftDraw *d;
if ((l = &win->bar.l)->buf == NULL || (r = &win->bar.r)->buf == NULL)
return;
e = &win->env;
y = (win->bar.top ? 0 : win->h) + font->ascent + V_TEXT_PAD;
w = win->w - 2*H_TEXT_PAD;
d = XftDrawCreate(e->dpy, win->buf.pm, e->vis, e->cmap);
XSetForeground(e->dpy, gc, win->bar_bg.pixel);
XFillRectangle(e->dpy, win->buf.pm, gc, 0, win->bar.top ? 0 : win->h, win->w, win->bar.h);
XSetForeground(e->dpy, gc, win->win_bg.pixel);
XSetBackground(e->dpy, gc, win->bar_bg.pixel);
if ((len = strlen(r->buf)) > 0) {
if ((tw = TEXTWIDTH(win, r->buf, len)) > w)
return;
x = win->w - tw - H_TEXT_PAD;
w -= tw;
win_draw_text(win, d, &win->bar_fg, x, y, r->buf, len, tw);
}
if ((len = strlen(l->buf)) > 0) {
x = H_TEXT_PAD;
w -= 2 * H_TEXT_PAD; /* gap between left and right parts */
win_draw_text(win, d, &win->bar_fg, x, y, l->buf, len, w);
}
XftDrawDestroy(d);
}
#else
static void win_draw_bar(win_t *win)
{
(void) win;
}
#endif /* HAVE_LIBFONTS */
void win_draw(win_t *win)
{
if (win->bar.h > 0)
win_draw_bar(win);
XSetWindowBackgroundPixmap(win->env.dpy, win->xwin, win->buf.pm);
XClearWindow(win->env.dpy, win->xwin);
XFlush(win->env.dpy);
}
void win_draw_rect(win_t *win, int x, int y, int w, int h, bool fill, int lw,
unsigned long col)
{
XGCValues gcval;
gcval.line_width = lw;
gcval.foreground = col;
XChangeGC(win->env.dpy, gc, GCForeground | GCLineWidth, &gcval);
if (fill)
XFillRectangle(win->env.dpy, win->buf.pm, gc, x, y, w, h);
else
XDrawRectangle(win->env.dpy, win->buf.pm, gc, x, y, w, h);
}
void win_set_title(win_t *win, const char *title, size_t len)
{
int i, targets[] = { ATOM_WM_NAME, ATOM_WM_ICON_NAME, ATOM__NET_WM_NAME, ATOM__NET_WM_ICON_NAME };
for (i = 0; i < (int)ARRLEN(targets); ++i) {
XChangeProperty(win->env.dpy, win->xwin, atoms[targets[i]],
atoms[ATOM_UTF8_STRING], 8, PropModeReplace,
(unsigned char *)title, len);
}
}
void win_set_cursor(win_t *win, cursor_t cursor)
{
if (cursor >= 0 && cursor < ARRLEN(cursors)) {
XDefineCursor(win->env.dpy, win->xwin, cursors[cursor].icon);
XFlush(win->env.dpy);
}
}
void win_cursor_pos(win_t *win, int *x, int *y)
{
int i;
unsigned int ui;
Window w;
if (!XQueryPointer(win->env.dpy, win->xwin, &w, &w, &i, &i, x, y, &ui))
*x = *y = 0;
}