first commit

mpv/scripts/file-browser/modules/apis/parse-state.lua

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+
+local msg = require 'mp.msg'
+
+local g = require 'modules.globals'
+
+local parse_state_API = {}
+
+--a wrapper around coroutine.yield that aborts the coroutine if
+--the parse request was cancelled by the user
+--the coroutine is 
+function parse_state_API:yield(...)
+    local co = coroutine.running()
+    local is_browser = co == g.state.co
+    if self.source == "browser" and not is_browser then
+        msg.error("current coroutine does not match browser's expected coroutine - did you unsafely yield before this?")
+        error("current coroutine does not match browser's expected coroutine - aborting the parse")
+    end
+
+    local result = table.pack(coroutine.yield(...))
+    if is_browser and co ~= g.state.co then
+        msg.verbose("browser no longer waiting for list - aborting parse for", self.directory)
+        error(g.ABORT_ERROR)
+    end
+    return unpack(result, 1, result.n)
+end
+
+--checks if the current coroutine is the one handling the browser's request
+function parse_state_API:is_coroutine_current()
+    return coroutine.running() == g.state.co
+end
+
+return parse_state_API