Feat(ToolView): Add native api

Add native api to support clipboard operations

app/src/main/kotlin/top/fatweb/oxygen/toolbox/util/NativeWebApi.kt

@@ -0,0 +1,34 @@
+package top.fatweb.oxygen.toolbox.util
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.Context.CLIPBOARD_SERVICE
+import android.webkit.JavascriptInterface
+import android.webkit.WebView
+
+class NativeWebApi(
+    private val context: Context,
+    private val webView: WebView
+) {
+    @JavascriptInterface
+    fun copyToClipboard(text: String): Boolean {
+        val clipboardManager = context.getSystemService(CLIPBOARD_SERVICE) as ClipboardManager?
+        return clipboardManager?.let {
+            it.setPrimaryClip(ClipData.newPlainText("copy", text))
+            true
+        } ?: false
+    }
+
+    @JavascriptInterface
+    fun readClipboard(): String {
+        val clipboardManager = context.getSystemService(CLIPBOARD_SERVICE) as ClipboardManager?
+        return clipboardManager?.primaryClip?.getItemAt(0)?.text?.toString() ?: ""
+    }
+
+    private fun callback(callback: String, vararg args: Any) {
+        val jsCode =
+            "$callback(${args.map { if (it is String) "'$it'" else it }.joinToString(", ")})"
+        webView.evaluateJavascript(jsCode, null)
+    }
+}