Tint Browser Sample Addon Project

This project is licensed under the Apache 2 license.

This is a sample project for writing an addon for Tint Browser. In order to build it, it is also needed to clone the Tint Browser Addon Framework Library project.

How to write an addon

Get the sources

Clone this project and the Tint Browser Addon Framework Library project.

Addon identity

Change the application package name of the project. Right-click on your project and select Android tools > Rename Application Package. Then rename the package in the src folder to match the application package name just given.

Open the AndroidManifest.xml file. From the line:

<category android:name="org.tint.intent.category.CHANGE_THIS_TO_YOUR_ADDON_NAME" />

Change CHANGE_THIS_TO_YOUR_ADDON_NAME for a unique string identifying your addon.

Customize your addon identity by providing icons in the res/drawable-* folders. Open the strings.xml file in the res/values folder, and setup the mandatory strings in it. Theses strings will be displayed to the user in the main application.

Addon architecture

Addons are called by Tint Browser on specific events. Addons can answers by a list of actions which are performed by the main application. Addons cannot manipulate themselves objects from the main application.

Implementation

The main class to implement is Addon.java in the addon project.

Callbacks

Callbacks are used to define to witch events an addon will be notify off. This definition is mandatory. This is done for two reasons:

1. To avoid calls to unused callbacks. When a call to addons must be made, the main application go through the list of active addons, check for each of them if they have defined the current callback, and if yes, call the addon and process its answer. Registering callbacks allow to avoid unnecessary calls to addons;
2. To display to user in the addons details view what an addon is notified of;

Defining callbacks is made in the getCallbacks() method. Default implementation return 0, which means no callbacks. Change the return value to the callbacks you want to use, separated by a | character.

Example:

@Override
public int getCallbacks() throws RemoteException {
return Callbacks.PAGE_FINISHED | Callbacks.HAS_SETTINGS_PAGE;
}

In this example, the addon will be notified when a page has finished to be loaded, and provide a settings page. For a list of callbacks, see Available callbacks.

Performing actions on the browser

The browser can perform actions defined by an addon. Performing actions is available on callbacks where the return type is List<Action>. To make to browser perform actions, create a list of Action, fill it, and return it. The action will be performed in the order they are in the list.

Example:

@Override
public List<Action> onPageFinished(String tabId, String url) throws RemoteException {
List<Action> response = new ArrayList<Action>();
response.add(new LoadUrlAction("http://www.something.org"));
return response;
}

The browser will load the given url in the current tab. For a list of available actions, see Available actions.

Appendix

Available callbacks

Callbacks.PAGE_STARTED

To be notified when a page starts loading.

Methods called:

• List<Action> onPageStarted(String tabId, String url)
  • tabId: The id of the tab where the url will be loaded.
  • url: The url which is going to be loaded.

Callbacks.PAGE_FINISHED

To be notified when a page ends loading.

Methods called:

• List<Action> onPageFinished(String tabId, String url)
  • tabId: The id of the tab where the url has been loaded.
  • url: The url which has been loaded.

Callbacks.TAB_OPENED

To be notified when a new tab is opened.

Methods called:

• List<Action> onTabOpened(String tabId)
  • tabId: The id of the new tab.

Callbacks.TAB_CLOSED

To be notified when a tab is closed.

Methods called:

• List<Action> onTabClosed(String tabId)
  • tabId: The id of the closed tab.

Callbacks.TAB_SWITCHED

To be notified when tabs are switched.

Methods called:

• List<Action> onTabSwitched(String tabId)
  • tabId: The id of the tab displayed to the user.

Callbacks.HAS_SETTINGS_PAGE

Set this if your addon has a settings page.

Methods called:

• void showAddonSettingsActivity()

In this method, you must open an Activity and display it to the user.

Example:

@Override
public void showAddonPreferenceActivity() throws RemoteException {
Intent i = new Intent(mService, Preferences.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
mService.startActivity(i);
}

Where Preferences is a class deriving from Activity. As for any Activity, it must be declared in the AndroidManifest.xml. The flag Intent.FLAG_ACTIVITY_NEW_TASK is mandatory, it will not work otherwise. The flag Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS is not mandatory, but recommended. If set, the Activity opened will not be shown in the recent tasks list, and thus will make Tint Browser and its addons behave as a single application.

TODO: Add recomandation for preferences pages here.

Callbacks.CONTRIBUTE_MAIN_MENU

To make an addon contribute an item to the main menu.

Methods called:

• String getContributedMainMenuItem(String currentTabId, String currentTitle, String currentUrl)
  • currentTabId: The id of the current tab.
  • currentTitle: The web page title of the current tab.
  • currentUrl: The web page url of the current tab.
  • Return: the title of the menu to be added. If null or empty, no menu will be shown.
• List<Action> onContributedMainMenuItemSelected(String currentTabId, String currentTitle, String currentUrl)
  • currentTabId: The id of the current tab.
  • currentTitle: The web page title of the current tab.
  • currentUrl: The web page url of the current tab.

Callbacks.CONTRIBUTE_LINK_CONTEXT_MENU

To make an addon contribute an item to the contextual menu on a link.

Methods called:

• String getContributedLinkContextMenuItem(String currentTabId, int hitTestResult, String url)
  • currentTabId: The id of the current tab.
  • hitTestResult: The HitTestResult, indicating the type of link hitted.
  • url: The url of the hitted link.
  • Return: the title of the menu to be added. If null or empty, no menu will be shown.
• List<Action> onContributedLinkContextMenuItemSelected(String currentTabId, int hitTestResult, String url)
  • currentTabId: The id of the current tab.
  • hitTestResult: The HitTestResult, indicating the type of link hitted.
  • url: The url of the hitted link.

Callbacks.CONTRIBUTE_HISTORY_BOOKMARKS_MENU

To make an addon contribute an item to the main menu in the bookmarks and history activity.

Methods called:

• String getContributedHistoryBookmarksMenuItem(String currentTabId)
  • currentTabId: The id of the current tab.
  • Return: the title of the menu to be added. If null or empty, no menu will be shown.
• List<Action> onContributedHistoryBookmarksMenuItemSelected(String currentTabId)
  • currentTabId: The id of the current tab.

Callbacks.CONTRIBUTE_BOOKMARK_CONTEXT_MENU

To make an addon contribute an item to the contextual menu on a bookmark in the bookmarks and history activity.

Methods called:

• String getContributedBookmarkContextMenuItem(String currentTabId)
  • currentTabId: The id of the current tab.
  • Return: the title of the menu to be added. If null or empty, no menu will be shown.
• List<Action> onContributedBookmarkContextMenuItemSelected(String currentTabId, String title, String url)
  • currentTabId: The id of the current tab.
  • title: The title of the selected bookmark.
  • url: The url of the selected bookmark.

Callbacks.CONTRIBUTE_HISTORY_CONTEXT_MENU

To make an addon contribute an item to the contextual menu on an history item in the bookmarks and history activity.

Methods called:

• String getContributedHistoryContextMenuItem(String currentTabId)
  • currentTabId: The id of the current tab.
  • Return: the title of the menu to be added. If null or empty, no menu will be shown.
• List<Action> onContributedHistoryContextMenuItemSelected(String currentTabId, String title, String url)
  • currentTabId: The id of the current tab.
  • title: The title of the selected history item.
  • url: The url of the selected history item.

Available actions

Open tab

Class: OpenTabAction.

Constuctors:

• OpenTabAction(): Open a new tab, loading the default home page defined by the user.
• OpenTabAction(String url): Open a new tab, and load the given url in it.

Close current tab

Class: TabAction, but do not create it directly. Use one of the method below.

Creation:

• static TabAction TabAction.createCloseTabAction(): Close the current tab.
• static TabAction TabAction.createCloseTabAction(String tabId): Close the tab with id tabId. Do nothing if tabId is invalid or does not exists.

Stop

Class: TabAction, but do not create it directly. Use one of the method below.

Creation:

• static TabAction TabAction.createBrowseStopAction(): Stop loading on the current tab.
• static TabAction TabAction.createBrowseStopAction(String tabId): Stop loading on the tab with id tabId. Do nothing if tabId is invalid or does not exists.

Reload

Class: TabAction, but do not create it directly. Use one of the method below.

Creation:

• static TabAction TabAction.createBrowseReloadAction(): Reload the current tab.
• static TabAction TabAction.createBrowseReloadAction(String tabId): Reload the tab with id tabId. Do nothing if tabId is invalid or does not exists.

Go back

Class: TabAction, but do not create it directly. Use one of the method below.

Creation:

• static TabAction TabAction.createBrowseBackAction(): Go back in history on the current tab.
• static TabAction TabAction.createBrowseBackAction(String tabId): Go back in history on the tab with id tabId. Do nothing if tabId is invalid or does not exists.

Go forward

Class: TabAction, but do not create it directly. Use one of the method below.

Creation:

• static TabAction TabAction.createBrowseForwardAction(): Go forward in history on the current tab.
• static TabAction TabAction.createBrowseForwardAction(String tabId): Go forward in history on the tab with id tabId. Do nothing if tabId is invalid or does not exists.

Show toast message

Class: ShowToastAction.

Constructors:

• ShowToastAction(String toastMessage)
  • toastMessage: The message to display as a toast. Duration of the toast is Toast.LENGTH_SHORT.
• ShowToastAction(String toastMessage, int toastLength)
  • toastMessage: The message to display as a toast.
  • toastLength: Duration of the toast. Must be either Toast.LENGTH_SHORT or Toast.LENGTH_LONG. If not, Toast.LENGTH_SHORT will be used.

Show dialog

Class: ShowDialogAction.

Constructor:

• ShowDialogAction(String title, String message)
  • title: Title of the dialog.
  • message: Message of the dialog.

Load url

Class: LoadUrlAction.

Constructors:

• LoadUrlAction(String url)
• LoadUrlAction(String tabId, String url)
• LoadUrlAction(String url, boolean loadRawUrl)
• LoadUrlAction(String tabId, String url, boolean loadRawUrl)

Load an url into a tab. If no tab is specified, the url will be loaded in the current tab. If the specified tab is invalid or does not exists, this action does nothing. If loadRawUrl is true (false when not specified), the given url will not be checked by the browser before loading, e.g. http:// will not be added if required, etc. Setting loadRawUrl to true is mandatory for javascript injection (e.g. injecting a piece of javascript in the page).

Asking something to the user

Asking something to the user is made in two steps. First an addon must create a specific action in a callback. When the user answer, a method in the addon is called to provide user answer. In order to keep track of questions, and int id must be provided to each action allowing to ask something to the user. This id will specified when the answer method is called.

Confirmation

Class: AskUserConfirmationAction.

Constructors:

• AskUserConfirmationAction(int id, String title, String message, String positiveButtonCaption, String negativeButtonCaption)
  • id: The id of the question.
  • title: Title of the message box.
  • message: Message of the message box.
  • positiveButtonCaption: Text displayed in the button for a positive answer.
  • negativeButtonCaption: Text displayed in the button for a negative answer.

Method called when user answer:

• List<Action> onUserConfirm(String currentTabId, int questionId, boolean positiveAnswer)
  • currentTabId: The id of the current tab.
  • questionId: The id of the question.
  • positiveAnswer: true if the user has clicked on the positive button, false if the user has clicked on the negative button or if the user has canceled the dialog (using the “Back” key).

Input

Class: AskUserInputAction.

Constructors:

• AskUserInputAction(int id, String title, String message)
  • id: The id of the question.
  • title: Title of the message box.
  • message: Message of the message box. Can be null.
• AskUserInputAction(int id, String title, String message, String inputHint)
  • inputHint: Hint to show in the EditText view of the dialog. Can be null.
• AskUserInputAction(int id, String title, String message, String inputHint, String defaultInput)
  • defaultInput: Default text in the EditText view of the dialog. Can be null.
• AskUserInputAction(int id, String title, String message, String inputHint, String defaultInput, int inputType)
  • inputType: Input type of the EditTextView of the dialog. This allow to custumize the input type, like set a password field, an url field, etc.

Method called when user answer:

• List<Action> onUserInput(String currentTabId, int questionId, boolean cancelled, String userInput)
  • currentTabId: The id of the current tab.
  • questionId: The id of the question.
  • cancelled: true if the user click on the “Cancel” button, or dismissed the dialog with the “Back” key. false if the user clicked on the “Ok” Button.
  • userInput: The text the user typed. Always null if cancelled is true.

Choice

Class: AskUserChoiceAction.

Constructors:

• AskUserChoiceAction(int id, String title, List<String> choices)
  • id: The id of the question.
  • title: Title of the message box.
  • choices: The choices for the user, as a List of String. Choices will be presented to the user in the order they are in this list.

Method called when user answer:

• List<Action> onUserChoice(String currentTabId, int questionId, boolean cancelled, int userChoice)
  • currentTabId: The id of the current tab.
  • questionId: The id of the question.
  • cancelled: true if the user click on the “Cancel” button, or dismissed the dialog with the “Back” key. false if the user clicked on the “Ok” Button.
  • userChoice: The index of the item selected by the user. Always -1 if cancelled is true.