添加字幕插件

packages/artplayer-plugin-subtitle/src/index.js

@@ -0,0 +1,33 @@
+function artplayerPluginSubtitle(option) {
+    return art => {
+        const { errorHandle, clamp, sleep } = art.constructor.utils;
+
+        errorHandle(
+            option && typeof option.time === 'number',
+            `The plugin 'artplayerPluginSubtitle': 'option.time' require 'number' type, but got '${typeof option.time}'`,
+        );
+
+        let retry = 0;
+        const maxRetry = 10;
+        const time = clamp(option.time, -10, 10);
+
+        function adjust() {
+            errorHandle(retry < maxRetry, 'It seems that something wrong for reading subtitle');
+            retry += 1;
+            const cues = Array.from(art.refs.$track.track.cues);
+            if (cues.length === 0) {
+                sleep(100).then(adjust);
+            } else {
+                cues.forEach(cue => {
+                    cue.startTime += time;
+                    cue.endTime += time;
+                });
+            }
+        }
+
+        art.on('subtitle:load', adjust);
+    };
+}
+
+window.artplayerPluginSubtitle = artplayerPluginSubtitle;
+export default artplayerPluginSubtitle;