/*
* GNU LESSER GENERAL PUBLIC LICENSE Copyright (C) 2006 The Lobo Project
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Contact info: lobochief@users.sourceforge.net
*/
/*
* Created on Aug 28, 2005
*/
package com.nvarghese.beowulf.common.cobra.html;
import java.net.URL;
import org.w3c.dom.html2.HTMLCollection;
import org.w3c.dom.html2.HTMLLinkElement;
/**
* The <code>HtmlRendererContext</code> interface must be implemented in order
* to use the Cobra HTML renderer. An instance of this interface will be called
* back whenever the renderer needs to perform an action that it is not designed
* to know how to perform on its own, e.g. opening a browser window or a context
* menu. In many ways this interface parallers the Javascript
* <code>Window</code> class (which in reality represents a browser frame, not a
* window).
* <p>
* A simple implementation of this interface is provided in
* {@link com.nvarghese.beowulf.common.cobra.com.nvarghese.beowulf.common.cobra.html.test.SimpleHtmlRendererContext
* SimpleHtmlRendererContext}.
*
* @see org.cobra_grendel.html.gui.HtmlPanel#setDocument(org.w3c.dom.Document,
* HtmlRendererContext)
*/
public interface HtmlRendererContext {
/**
* Navigates to the location given. Implementations should retrieve the URL
* content, parse it and render it.
*
* @param url
* The destination URL.
* @param target
* Same as the target attribute in the HTML anchor tag, i.e.
* _top, _blank, etc.
*/
public void navigate(URL url, String target);
/**
* Performs a link click. Implementations should invoke
* {@link #navigate(URL, String)}.
*
* @param linkNode
* The HTML node that was clicked.
* @param url
* The destination URL.
* @param target
* Same as the target attribute in the HTML anchor tag, i.e.
* _top, _blank, etc.
*/
public void linkClicked(org.w3c.dom.html2.HTMLElement linkNode, URL url, String target);
/**
* Gets a collection of frames from the document currently in the context.
*/
public HTMLCollection getFrames();
/**
* Submits a HTML form. Note that when the the method is "GET", parameters
* are still expected to be part of <code>formInputs</code>.
*
* @param method
* The request method, GET or POST.
* @param action
* The destination URL.
* @param target
* Same as the target attribute in the FORM tag, i.e. _blank,
* _top, etc.
* @param enctype
* The encoding type.
* @param formInputs
* An array of
* {@link com.nvarghese.beowulf.common.cobra.html.FormInput}
* instances.
*/
public void submitForm(String method, URL action, String target, String enctype, FormInput[] formInputs);
/**
* Creates a {@link com.nvarghese.beowulf.common.cobra.html.BrowserFrame}
* instance.
*/
public BrowserFrame createBrowserFrame();
/**
* Gets the user agent context.
*/
public UserAgentContext getUserAgentContext();
/**
* Gets a <code>HtmlObject</code> instance that implements a OBJECT tag from
* HTML.
*
* @param element
* The DOM element for the object, which may either represent an
* OBJECT, EMBED or an APPLET tag.
* @return Implementations of this method must return <code>null</code> if
* they have any problems producing a <code>HtmlObject</code>
* instance. This is particularly true of OBJECT tags, where inner
* HTML of the tag must be rendered if the OBJECT content cannot be
* handled.
*/
public HtmlObject getHtmlObject(org.w3c.dom.html2.HTMLElement element);
/**
* This method is called when a visual element is right-clicked.
*
* @param element
* The narrowest element enclosing the mouse location.
* @param event
* The mouse event.
* @return The method should return true to continue propagating the event,
* or false to stop propagating it.
*/
public boolean onContextMenu(org.w3c.dom.html2.HTMLElement element, java.awt.event.MouseEvent event);
/**
* This method is called when there's a mouse click on an element.
*
* @param element
* The narrowest element enclosing the mouse location.
* @param event
* The mouse event.
* @return The method should return true to continue propagating the event,
* or false to stop propagating it.
*/
public boolean onMouseClick(org.w3c.dom.html2.HTMLElement element, java.awt.event.MouseEvent event);
/**
* This method is called when there's a mouse double-click on an element.
*
* @param element
* The narrowest element enclosing the mouse location.
* @param event
* The mouse event.
* @return The method should return true to continue propagating the event,
* or false to stop propagating it.
*/
public boolean onDoubleClick(org.w3c.dom.html2.HTMLElement element, java.awt.event.MouseEvent event);
/**
* This method is called when the mouse first hovers over an element.
*
* @param element
* The element that the mouse has just entered.
* @param event
* The mouse event.
*/
public void onMouseOver(org.w3c.dom.html2.HTMLElement element, java.awt.event.MouseEvent event);
/**
* This method is called when the mouse no longer hovers a given element.
*
* @param element
* The element that the mouse has just exited.
* @param event
* The mouse event.
*/
public void onMouseOut(org.w3c.dom.html2.HTMLElement element, java.awt.event.MouseEvent event);
/**
* This method should return true if and only if image loading needs to be
* enabled.
*/
public boolean isImageLoadingEnabled();
// ------ Methods useful for Window implementation:
/**
* Opens an alert dialog.
*
* @param message
* Message shown by the dialog.
*/
public void alert(String message);
/**
* Goes to the previous page in the browser's history.
*/
public void back();
/**
* Relinquishes focus.
*/
public void blur();
/**
* Closes the browser window, provided this is allowed for the current
* context.
*/
public void close();
/**
* Opens a confirmation dialog.
*
* @param message
* The message shown by the confirmation dialog.
* @return True if the user selects YES.
*/
public boolean confirm(String message);
/**
* Requests focus for the current window.
*/
public void focus();
/**
* Opens a separate browser window and renders a URL.
*
* @param absoluteUrl
* The URL to be rendered.
* @param windowName
* The name of the new window.
* @param windowFeatures
* The features of the new window (same as in Javascript open
* method).
* @param replace
* @return A new
* {@link com.nvarghese.beowulf.common.cobra.html.HtmlRendererContext}
* instance.
* @deprecated Use {@link #open(URL, String, String, boolean)} instead.
*/
public HtmlRendererContext open(String absoluteUrl, String windowName, String windowFeatures, boolean replace);
/**
* Opens a separate browser window and renders a URL.
*
* @param url
* The URL to be rendered.
* @param windowName
* The name of the new window.
* @param windowFeatures
* The features of the new window (same as in Javascript open
* method).
* @param replace
* @return A new
* {@link com.nvarghese.beowulf.common.cobra.html.HtmlRendererContext}
* instance.
*/
public HtmlRendererContext open(java.net.URL url, String windowName, String windowFeatures, boolean replace);
/**
* Shows a prompt dialog.
*
* @param message
* The message shown by the dialog.
* @param inputDefault
* The default input value.
* @return The user's input value.
*/
public String prompt(String message, String inputDefault);
/**
* Scrolls the client area.
*
* @param x
* Document's x coordinate.
* @param y
* Document's y coordinate.
*/
public void scroll(int x, int y);
/**
* Scrolls the client area.
*
* @param x
* Horizontal pixels to scroll.
* @param y
* Vertical pixels to scroll.
*/
public void scrollBy(int x, int y);
/**
* Resizes the window.
*
* @param width
* The new width.
* @param height
* The new height.
*/
public void resizeTo(int width, int height);
/**
* Resizes the window.
*
* @param byWidth
* The number of pixels to resize the width by.
* @param byHeight
* The number of pixels to resize the height by.
*/
public void resizeBy(int byWidth, int byHeight);
/**
* Gets a value indicating if the window is closed.
*/
public boolean isClosed();
public String getDefaultStatus();
public void setDefaultStatus(String value);
/**
* Gets the window name.
*/
public String getName();
/**
* Gets the parent of the frame/window in the current context.
*/
public HtmlRendererContext getParent();
/**
* Gets the opener of the frame/window in the current context.
*/
public HtmlRendererContext getOpener();
/**
* Sets the context that opened the current frame/window.
*
* @param opener
* A
* {@link com.nvarghese.beowulf.common.cobra.html.HtmlRendererContext}
* .
*/
public void setOpener(HtmlRendererContext opener);
/**
* Gets the window status text.
*/
public String getStatus();
/**
* Sets the window status text.
*
* @param message
* A string.
*/
public void setStatus(String message);
/**
* Gets the top-most browser frame/window.
*/
public HtmlRendererContext getTop();
/**
* It should return true if the link provided has been visited.
*/
public boolean isVisitedLink(HTMLLinkElement link);
/**
* Reloads the current document.
*/
public void reload();
/**
* Gets the number of pages in the history list.
*/
public int getHistoryLength();
/**
* Gets the current URL in history.
*/
public String getCurrentURL();
/**
* Gets the next URL in the history.
*/
public String getNextURL();
/**
* Gets the previous URL in the history.
*/
public String getPreviousURL();
/**
* Goes forward one page.
*/
public void forward();
/**
* Navigates the history according to the given offset.
*
* @param offset
* A positive or negative number. -1 is equivalent to
* {@link #back()}. +1 is equivalent to {@link #forward()}.
*/
public void moveInHistory(int offset);
/**
* Navigates to a URL in the history list.
*/
public void goToHistoryURL(String url);
}