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DO NOT MERGE YET Protocol Handler support #497

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DO NOT MERGE YET Protocol Handler support #497

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63 changes: 53 additions & 10 deletions ...browserhelper/src/main/java/com/google/androidbrowserhelper/trusted/LauncherActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,10 @@

import org.json.JSONException;

import java.util.Collections;
import java.util.Map;
import java.util.Objects;

/**
* A convenience class to make using Trusted Web Activities easier. You can extend this class for
* basic modifications to the behaviour.
Expand Down Expand Up @@ -200,8 +204,9 @@ protected void launchTwa() {
getColorCompat(mMetadata.navigationBarDividerColorDarkId))
.build();

Uri launchUrl = getLaunchingUrl();
TrustedWebActivityIntentBuilder twaBuilder =
new TrustedWebActivityIntentBuilder(getLaunchingUrl())
new TrustedWebActivityIntentBuilder(launchUrl)
.setToolbarColor(getColorCompat(mMetadata.statusBarColorId))
.setNavigationBarColor(getColorCompat(mMetadata.navigationBarColorId))
.setNavigationBarDividerColor(
Expand All @@ -212,6 +217,12 @@ protected void launchTwa() {
.setDisplayMode(getDisplayMode())
.setScreenOrientation(mMetadata.screenOrientation);

// TODO When available
// Uri intentUrl = getIntent().getData();
// if (!launchUrl.equals(intentUrl)) {
// twaBuilder.setOriginalLaunchUrl(launchUrlBundle.getOriginalUrl());
// }

if (mMetadata.additionalTrustedOrigins != null) {
twaBuilder.setAdditionalTrustedOrigins(mMetadata.additionalTrustedOrigins);
}
Expand Down Expand Up @@ -330,6 +341,23 @@ protected void onSaveInstanceState(Bundle outState) {
outState.putBoolean(BROWSER_WAS_LAUNCHED_KEY, mBrowserWasLaunched);
}

/**
* Override this to enable Protocol Handler support.
* Keys of this map are data schemes, e.g. "bitcoin", "irc", "xmpp", "web+coffee", and values
* are templates that will be used to construct the full URL. The template must contain a "%s"
* token and be an absolute location with http/https scheme and the same origin as the TWA.
*
* An example valid entry in the map would be:
* ["web+coffee"] -> ["https://coffee.com/?type=%s"]
* This would result in a link "web+coffee://latte" being converted to
* "https://coffee.com/?type=web%2Bcoffee%3A%2F%2Flatte".
*
* {@see https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Manifest/Reference/protocol_handlers}
*/
protected Map<String, Uri> getProtocolHandlers() {
return Collections.emptyMap();
}

@Override
public void onEnterAnimationComplete() {
super.onEnterAnimationComplete();
Expand All @@ -347,18 +375,33 @@ public void onEnterAnimationComplete() {
* Override this for special handling (such as ignoring or sanitising data from the Intent).
*/
protected Uri getLaunchingUrl() {
Uri uri = getIntent().getData();
if (uri != null) {
Log.d(TAG, "Using URL from Intent (" + uri + ").");
return uri;
}
Uri defaultUrl = Uri.parse(mMetadata.defaultUrl);

Uri intentUrl = getIntent().getData();

if (intentUrl != null) {
Map<String, Uri> protocolHandlers = getProtocolHandlers();
String scheme = intentUrl.getScheme();

Uri format = protocolHandlers.get(scheme);
if (format != null) {
String target = Uri.encode(intentUrl.toString());
Uri targetUrl = Uri.parse(String.format(format.toString(), target));
Log.d(TAG, "Using protocol handler url: " + targetUrl);
return targetUrl;
}

if ("https".equals(scheme)) {
Log.d(TAG, "Using url from Intent: " + intentUrl);
return intentUrl;
}

if (mMetadata.defaultUrl != null) {
Log.d(TAG, "Using URL from Manifest (" + mMetadata.defaultUrl + ").");
return Uri.parse(mMetadata.defaultUrl);
Log.w(TAG, "Scheme " + scheme + " was registered in the manifest but not in " +
"getProtocolHandlers()! Ignoring it and falling back to the default url.");
}

return Uri.parse("https://www.example.com/");
Log.d(TAG, "Using url from Manifest: " + defaultUrl);
return defaultUrl;
}

/**
Expand Down