webview.py

import weakref

from android.webkit import WebResourceRequest, WebView as A_WebView, WebViewClient
from java import Override, jboolean, jvoid, static_proxy
from java.lang import String as jstring

from ..base import suppress_reference_error


class TogaWebClient(static_proxy(WebViewClient)):
    def __init__(self, impl):
        self.impl = weakref.proxy(impl)
        self.interface = weakref.proxy(impl.interface)
        super().__init__()

    @Override(jboolean, [A_WebView, WebResourceRequest])
    def shouldOverrideUrlLoading(self, webview, webresourcerequest):
        allow = True
        with suppress_reference_error():
            if self.interface.on_navigation_starting._raw:
                url = webresourcerequest.getUrl().toString()
                result = self.interface.on_navigation_starting(url=url)
                if isinstance(result, bool):
                    # on_navigation_starting handler is synchronous
                    allow = result
                else:
                    # on_navigation_starting handler is asynchronous. Deny navigation
                    # until the user defined on_navigation_starting coroutine has
                    # completed.
                    allow = False
        return not allow

    @Override(jvoid, [A_WebView, jstring])
    def onPageFinished(self, webview, url):
        with suppress_reference_error():
            self.interface.on_webview_load()
            if self.impl.loaded_future:
                self.impl.loaded_future.set_result(None)
                self.impl.loaded_future = None