WebPositive: Smart URL handling improvements (GCI task)

 - Fixed: WebPositive now successfuly detects foreign protocols and
launches their respective applications.
 - Improved: The decision whether to use a search engine or a DNS lookup
for the text entered in the address bar, including for internationalized
names (IDN) (though we do not handle them correctly later on yet).
 - TODO: escape the query string before passing it to webkit
(for example for: "3+4")

src/apps/webpositive/BrowserWindow.cpp

@@ -652,11 +652,10 @@ BrowserWindow::MessageReceived(BMessage* message)
 			BString url;
 			if (message->FindString("url", &url) != B_OK)
 				url = fURLInputGroup->Text();
+
 			_SetPageIcon(CurrentWebView(), NULL);
-			BString newUrl = _SmartURLHandler(url);
-			if (newUrl != url)
-				fURLInputGroup->TextView()->SetText(newUrl);
-			CurrentWebView()->LoadURL(newUrl.String());
+			_SmartURLHandler(url);
+
 			break;
 		}
 		case GO_BACK:
@@ -2149,18 +2148,93 @@ BrowserWindow::_NewTabURL(bool isNewWindow) const
 }
 
 
-BString
-BrowserWindow::_SmartURLHandler(const BString& url) const
+void
+BrowserWindow::_VisitURL(const BString& url)
+{
+	//fURLInputGroup->TextView()->SetText(url);
+	CurrentWebView()->LoadURL(url.String());
+}
+
+
+void
+BrowserWindow::_VisitSearchEngine(const BString& search)
 {
-	BString result = url;
+	// TODO: Google Code-In Task to make default search
+	//			engine modifiable from Settings? :)
+
+	BString engine = "http://www.google.com/search?q=";
+	engine += search;
+		// WebKit takes care of URL encoding here.
+
+	_VisitURL(engine);
+}
+
+
+inline bool
+BrowserWindow::_IsValidDomainChar(char ch)
+{
+	// TODO: Currenlty, only a whitespace character
+	//			breaks a domain name. It might be
+	//			a good idea (or a bad one) to make
+	//			character filtering based on the
+	//			IDNA 2008 standard.
+
+	return ch != ' ';
+}
 
+
+void
+BrowserWindow::_SmartURLHandler(const BString& url)
+{
 	// Only process if this doesn't look like a full URL (http:// or
 	// file://, etc.)
-	if (url.FindFirst("://") == B_ERROR) {
-		if (url.FindFirst(".") == B_ERROR || url.FindFirst(" ") != B_ERROR)
-			result.Prepend("http://www.google.com/search?q=");
+
+	BString temp;
+	int32 at = url.FindFirst(":");
+
+	if (at != B_ERROR) {
+		BString proto;
+		url.CopyInto(proto, 0, at);
+
+		if (proto == "http" || 	proto == "https" ||	proto == "file")
+			_VisitURL(url);
+		else {
+			temp = "application/x-vnd.Be.URL.";
+			temp += proto;
+
+			char* argv[1] = { (char*)url.String() };
+
+			if (be_roster->Launch(temp.String(), 1, argv) != B_OK)
+				_VisitSearchEngine(url);
+		}
+	} else if (url == "localhost")
+		_VisitURL("http://localhost/");
+	else {
+		const char* localhostPrefix = "localhost/";
+
+		if(url.Compare(localhostPrefix, strlen(localhostPrefix)) == 0)
+			_VisitURL(url);
+		else {
+			bool isURL = false;
+
+			for (int32 i = 0; i < url.CountChars(); i++) {
+				if (url[i] == '.')
+					isURL = true;
+				else if (url[i] == '/')
+					break;
+				else if (!_IsValidDomainChar(url[i])) {
+					isURL = false;
+
+					break;
+				}
+			}
+
+			if (isURL)
+				_VisitURL(url);
+			else
+				_VisitSearchEngine(url);
+		}
 	}
-	return result;
 }
 
 

src/apps/webpositive/BrowserWindow.h

@@ -190,7 +190,11 @@ class BrowserWindow : public BWebWindow {
 			void				_InvokeButtonVisibly(BButton* button);
 
 			BString				_NewTabURL(bool isNewWindow) const;
-			BString				_SmartURLHandler(const BString& url) const;
+
+			void				_VisitURL(const BString& url);
+			void				_VisitSearchEngine(const BString& search);
+	inline 	bool				_IsValidDomainChar(char ch);
+			void 				_SmartURLHandler(const BString& url);
 
 			void				_HandlePageSourceResult(
 									const BMessage* message);