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Steven Degutis
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Jul 27, 2014
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // screen_watcher.h | ||
| // Hydra | ||
| // | ||
| // Created by Steven on 7/26/14. | ||
| // Copyright (c) 2014 Steven. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
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| @interface screen_watcher : NSObject | ||
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| @end |
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| @@ -0,0 +1,109 @@ | ||
| #import "helpers.h" | ||
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| @interface HydraScreenWatcher : NSObject | ||
| @property lua_State* L; | ||
| @property int fn; | ||
| @end | ||
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| @implementation HydraScreenWatcher | ||
| - (void) screensChanged:(id)bla { | ||
| lua_State* L = self.L; | ||
| lua_rawgeti(L, LUA_REGISTRYINDEX, self.fn); | ||
| if (lua_pcall(L, 0, 0, 0)) | ||
| hydra_handle_error(L); | ||
| } | ||
| @end | ||
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| typedef struct _screenwatcher_t { | ||
| bool running; | ||
| int fn; | ||
| void* obj; | ||
| } screenwatcher_t; | ||
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| /// screen.watcher.new(fn) -> watcher | ||
| /// Creates a new screen-watcher that can be started; fn will be called when your screen layout changes in any way, whether by adding/removing/moving monitors or like whatever. | ||
| static int screen_watcher_new(lua_State* L) { | ||
| luaL_checktype(L, 1, LUA_TFUNCTION); | ||
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| screenwatcher_t* screenwatcher = lua_newuserdata(L, sizeof(screenwatcher_t)); | ||
| memset(screenwatcher, 0, sizeof(screenwatcher_t)); | ||
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| lua_pushvalue(L, 1); | ||
| screenwatcher->fn = luaL_ref(L, LUA_REGISTRYINDEX); | ||
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| HydraScreenWatcher* object = [[HydraScreenWatcher alloc] init]; | ||
| object.L = L; | ||
| object.fn = screenwatcher->fn; | ||
| screenwatcher->obj = (__bridge_retained void*)object; | ||
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| luaL_getmetatable(L, "screen_watcher"); | ||
| lua_setmetatable(L, -2); | ||
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| return 1; | ||
| } | ||
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| static int screen_watcher_start(lua_State* L) { | ||
| screenwatcher_t* screenwatcher = luaL_checkudata(L, 1, "screen_watcher"); | ||
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| if (screenwatcher->running) return 0; | ||
| screenwatcher->running = true; | ||
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| [[NSNotificationCenter defaultCenter] addObserver:(__bridge id)screenwatcher->obj | ||
| selector:@selector(screensChanged:) | ||
| name:NSApplicationDidChangeScreenParametersNotification | ||
| object:nil]; | ||
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| return 0; | ||
| } | ||
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| static int screen_watcher_stop(lua_State* L) { | ||
| screenwatcher_t* screenwatcher = luaL_checkudata(L, 1, "screen_watcher"); | ||
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| if (!screenwatcher->running) return 0; | ||
| screenwatcher->running = false; | ||
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| [[NSNotificationCenter defaultCenter] removeObserver:(__bridge id)screenwatcher->obj]; | ||
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| return 0; | ||
| } | ||
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| static int screen_watcher_stopall(lua_State* L) { | ||
| lua_getglobal(L, "screen"); | ||
| lua_getfield(L, -1, "watcher"); | ||
| lua_getfield(L, -1, "stop"); | ||
| hydra_remove_all_handlers(L, "screen_watcher"); | ||
| return 0; | ||
| } | ||
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| static int screen_watcher_gc(lua_State* L) { | ||
| screenwatcher_t* screenwatcher = luaL_checkudata(L, 1, "screen_watcher"); | ||
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| luaL_unref(L, LUA_REGISTRYINDEX, screenwatcher->fn); | ||
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| HydraScreenWatcher* object = (__bridge_transfer id)screenwatcher->obj; | ||
| object = nil; | ||
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| return 0; | ||
| } | ||
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| static luaL_Reg screen_watcherlib[] = { | ||
| {"new", screen_watcher_new}, | ||
| {"start", screen_watcher_start}, | ||
| {"stop", screen_watcher_stop}, | ||
| {"stopall", screen_watcher_stopall}, | ||
| {"__gc", screen_watcher_gc}, | ||
| {} | ||
| }; | ||
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| int luaopen_screen_watcher(lua_State* L) { | ||
| luaL_newlib(L, screen_watcherlib); | ||
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| lua_pushvalue(L, -1); | ||
| lua_setfield(L, -2, "__index"); | ||
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| lua_pushvalue(L, -1); | ||
| lua_setfield(L, LUA_REGISTRYINDEX, "screen_watcher"); | ||
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| return 1; | ||
| } |
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