Feature #113: Set opacity based on conditions
- Add --opacity-rule, which sets opacity based on conditions, as requested by zabbal. (#113) - Add a data field for each condition. - Correct the FAQ link in README.md. Silly me. - Code clean-up.
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@ -77,7 +77,7 @@ $ make install
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## Known issues
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* Our [FAQ](https://github.com/chjj/compton/wiki/vsync-guide) covers some known issues.
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* Our [FAQ](https://github.com/chjj/compton/wiki/faq) covers some known issues.
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* VSync does not work too well. You may check the [VSync Guide](https://github.com/chjj/compton/wiki/vsync-guide) for how to get (possibly) better effects.
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16
src/c2.c
16
src/c2.c
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@ -14,7 +14,8 @@
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* Parse a condition string.
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*/
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c2_lptr_t *
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c2_parse(session_t *ps, c2_lptr_t **pcondlst, const char *pattern) {
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c2_parsed(session_t *ps, c2_lptr_t **pcondlst, const char *pattern,
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void *data) {
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if (!pattern)
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return NULL;
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@ -41,6 +42,7 @@ c2_parse(session_t *ps, c2_lptr_t **pcondlst, const char *pattern) {
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" list element.");
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memcpy(plptr, &lptr_def, sizeof(c2_lptr_t));
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plptr->ptr = result;
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plptr->data = data;
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if (pcondlst) {
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plptr->next = *pcondlst;
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*pcondlst = plptr;
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@ -1274,20 +1276,26 @@ c2_match_once(session_t *ps, win *w, const c2_ptr_t cond) {
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* Match a window against a condition linked list.
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*
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* @param cache a place to cache the last matched condition
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* @param pdata a place to return the data
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* @return true if matched, false otherwise.
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*/
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bool
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c2_match(session_t *ps, win *w, const c2_lptr_t *condlst,
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const c2_lptr_t **cache) {
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c2_matchd(session_t *ps, win *w, const c2_lptr_t *condlst,
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const c2_lptr_t **cache, void **pdata) {
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// Check if the cached entry matches firstly
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if (cache && *cache && c2_match_once(ps, w, (*cache)->ptr))
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if (cache && *cache && c2_match_once(ps, w, (*cache)->ptr)) {
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if (pdata)
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*pdata = (*cache)->data;
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return true;
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}
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// Then go through the whole linked list
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for (; condlst; condlst = condlst->next) {
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if (c2_match_once(ps, w, condlst->ptr)) {
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if (cache)
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*cache = condlst;
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if (pdata)
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*pdata = condlst->data;
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return true;
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}
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}
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2
src/c2.h
2
src/c2.h
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@ -156,12 +156,14 @@ const static c2_l_t leaf_def = C2_L_INIT;
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/// Linked list type of conditions.
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struct _c2_lptr {
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c2_ptr_t ptr;
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void *data;
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struct _c2_lptr *next;
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};
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/// Initializer for c2_lptr_t.
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#define C2_LPTR_INIT { \
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.ptr = C2_PTR_INIT, \
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.data = NULL, \
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.next = NULL, \
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}
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17
src/common.h
17
src/common.h
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@ -546,6 +546,8 @@ typedef struct {
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bool inactive_dim_fixed;
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/// Conditions of windows to have inverted colors.
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c2_lptr_t *invert_color_list;
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/// Rules to change window opacity.
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c2_lptr_t *opacity_rules;
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// === Focus related ===
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/// Consider windows of specific types to be always focused.
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@ -921,6 +923,7 @@ typedef struct _win {
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const c2_lptr_t *cache_fcblst;
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const c2_lptr_t *cache_ivclst;
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const c2_lptr_t *cache_bbblst;
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const c2_lptr_t *cache_oparule;
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// Opacity-related members
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/// Current window opacity.
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@ -933,6 +936,8 @@ typedef struct _win {
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/// broken window managers not transferring client window's
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/// _NET_WM_OPACITY value
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opacity_t opacity_prop_client;
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/// Last window opacity value we set.
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long opacity_set;
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// Fading-related members
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/// Do not fade if it's false. Change on window type change.
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@ -2027,14 +2032,20 @@ opts_set_no_fading_openclose(session_t *ps, bool newval);
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///@{
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c2_lptr_t *
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c2_parse(session_t *ps, c2_lptr_t **pcondlst, const char *pattern);
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c2_parsed(session_t *ps, c2_lptr_t **pcondlst, const char *pattern,
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void *data);
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#define c2_parse(ps, pcondlst, pattern) c2_parsed((ps), (pcondlst), (pattern), NULL)
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c2_lptr_t *
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c2_free_lptr(c2_lptr_t *lp);
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bool
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c2_match(session_t *ps, win *w, const c2_lptr_t *condlst,
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const c2_lptr_t **cache);
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c2_matchd(session_t *ps, win *w, const c2_lptr_t *condlst,
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const c2_lptr_t **cache, void **pdata);
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#define c2_match(ps, w, condlst, cache) c2_matchd((ps), (w), (condlst), \
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(cache), NULL)
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#endif
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///@}
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@ -2426,6 +2426,28 @@ win_determine_blur_background(session_t *ps, win *w) {
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add_damage_win(ps, w);
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}
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/**
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* Update window opacity according to opacity rules.
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*/
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static void
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win_update_opacity_rule(session_t *ps, win *w) {
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// If long is 32-bit, unfortunately there's no way could we express "unset",
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// so we just entirely don't distinguish "unset" and OPAQUE
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long opacity = OPAQUE;
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void *val = NULL;
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if (c2_matchd(ps, w, ps->o.opacity_rules, &w->cache_oparule, &val))
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opacity = ((double) (long) val) / 100.0 * OPAQUE;
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if (opacity == w->opacity_set)
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return;
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if (OPAQUE != opacity)
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wid_set_opacity_prop(ps, w->id, opacity);
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else if (OPAQUE != w->opacity_set)
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wid_rm_opacity_prop(ps, w->id);
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w->opacity_set = opacity;
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}
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/**
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* Function to be called on window type changes.
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*/
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@ -2436,6 +2458,8 @@ win_on_wtype_change(session_t *ps, win *w) {
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win_update_focused(ps, w);
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if (ps->o.invert_color_list)
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win_determine_invert_color(ps, w);
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if (ps->o.opacity_rules)
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win_update_opacity_rule(ps, w);
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}
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/**
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@ -2453,6 +2477,8 @@ win_on_factor_change(session_t *ps, win *w) {
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win_update_focused(ps, w);
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if (ps->o.blur_background_blacklist)
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win_determine_blur_background(ps, w);
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if (ps->o.opacity_rules)
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win_update_opacity_rule(ps, w);
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}
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/**
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@ -2670,11 +2696,13 @@ add_win(session_t *ps, Window id, Window prev) {
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.cache_fcblst = NULL,
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.cache_ivclst = NULL,
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.cache_bbblst = NULL,
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.cache_oparule = NULL,
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.opacity = 0,
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.opacity_tgt = 0,
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.opacity_prop = OPAQUE,
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.opacity_prop_client = OPAQUE,
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.opacity_set = OPAQUE,
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.fade = false,
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.fade_force = UNSET,
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@ -4351,6 +4379,12 @@ usage(int ret) {
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"--invert-color-include condition\n"
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" Specify a list of conditions of windows that should be painted with\n"
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" inverted color. Resource-hogging, and is not well tested.\n"
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"--opacity-rule opacity:condition\n"
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" Specify a list of opacity rules, in the format \"PERCENT:PATTERN\",\n"
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" like \'50:name *= \"Firefox\"'. compton-trans is recommended over\n"
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" this. Note we do not distinguish 100% and unset, and we don't make\n"
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" any guarantee about possible conflicts with other programs that set\n"
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" _NET_WM_WINDOW_OPACITY on frame or client windows.\n"
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"--backend backend\n"
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" Choose backend. Possible choices are xrender and glx" WARNING ".\n"
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"--glx-no-stencil\n"
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@ -4638,6 +4672,9 @@ parse_conv_kern(session_t *ps, const char *src, const char **endptr) {
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return parse_matrix(ps, src, endptr);
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}
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/**
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* Parse a list of convolution kernels.
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*/
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static bool
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parse_conv_kern_lst(session_t *ps, const char *src, XFixed **dest, int max) {
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static const struct {
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@ -4682,6 +4719,37 @@ parse_conv_kern_lst(session_t *ps, const char *src, XFixed **dest, int max) {
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return true;
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}
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/**
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* Parse a list of opacity rules.
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*/
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static inline bool
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parse_rule_opacity(session_t *ps, const char *src) {
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// Find opacity value
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char *endptr = NULL;
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long val = strtol(src, &endptr, 0);
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if (!endptr || endptr == src) {
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printf_errf("(\"%s\"): No opacity specified?", src);
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return false;
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}
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if (val > 100 || val < 0) {
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printf_errf("(\"%s\"): Opacity %ld invalid.", src, val);
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return false;
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}
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// Skip over spaces
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while (*endptr && isspace(*endptr))
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++endptr;
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if (':' != *endptr) {
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printf_errf("(\"%s\"): Opacity terminator not found.", src);
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return false;
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}
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++endptr;
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// Parse pattern
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// I hope 1-100 is acceptable for (void *)
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return c2_parsed(ps, &ps->o.opacity_rules, endptr, (void *) val);
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}
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#ifdef CONFIG_LIBCONFIG
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/**
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* Get a file stream of the configuration file to read.
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@ -5049,6 +5117,7 @@ get_cfg(session_t *ps, int argc, char *const *argv, bool first_pass) {
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{ "blur-kern", required_argument, NULL, 301 },
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{ "resize-damage", required_argument, NULL, 302 },
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{ "glx-use-gpushader4", no_argument, NULL, 303 },
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{ "opacity-rule", required_argument, NULL, 304 },
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// Must terminate with a NULL entry
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{ NULL, 0, NULL, 0 },
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};
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@ -5282,6 +5351,11 @@ get_cfg(session_t *ps, int argc, char *const *argv, bool first_pass) {
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ps->o.resize_damage = atoi(optarg);
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break;
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P_CASEBOOL(303, glx_use_gpushader4);
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case 304:
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// --opacity-rule
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if (!parse_rule_opacity(ps, optarg))
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exit(1);
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break;
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default:
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usage(1);
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break;
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@ -6216,6 +6290,7 @@ session_init(session_t *ps_old, int argc, char **argv) {
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.inactive_dim = 0.0,
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.inactive_dim_fixed = false,
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.invert_color_list = NULL,
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.opacity_rules = NULL,
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.wintype_focus = { false },
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.use_ewmh_active_win = false,
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@ -6635,6 +6710,7 @@ session_destroy(session_t *ps) {
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free_wincondlst(&ps->o.focus_blacklist);
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free_wincondlst(&ps->o.invert_color_list);
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free_wincondlst(&ps->o.blur_background_blacklist);
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free_wincondlst(&ps->o.opacity_rules);
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#endif
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// Free tracked atom list
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@ -415,6 +415,17 @@ win_has_frame(const win *w) {
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|| w->top_width || w->left_width || w->right_width || w->bottom_width;
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}
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static inline void
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wid_set_opacity_prop(session_t *ps, Window wid, long val) {
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XChangeProperty(ps->dpy, wid, ps->atom_opacity, XA_CARDINAL, 32,
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PropModeReplace, (unsigned char *) &val, 1);
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}
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static inline void
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wid_rm_opacity_prop(session_t *ps, Window wid) {
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XDeleteProperty(ps->dpy, wid, ps->atom_opacity);
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}
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/**
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* Dump an drawable's info.
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*/
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