Package org.lobobrowser.html
Interface HtmlRendererContext
- All Known Implementing Classes:
AbstractHtmlRendererContext
,SimpleHtmlRendererContext
public interface HtmlRendererContext
The
HtmlRendererContext
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 Window
class (which
in reality represents a browser frame, not a window).
A simple implementation of this interface is provided in
SimpleHtmlRendererContext
.
-
Method Summary
Modifier and TypeMethodDescriptionvoid
Opens an alert dialog.void
back()
Goes to the previous page in the browser's history.void
blur()
Relinquishes focus.void
close()
Closes the browser window, provided this is allowed for the current context.boolean
Opens a confirmation dialog.Creates aBrowserFrame
instance.void
focus()
Requests focus for the current window.void
forward()
Goes forward one page.Gets the current URL in history.Gets a collection of frames from the document currently in the context.int
Gets the number of pages in the history list.getHtmlObject
(HTMLElement element) Gets aHtmlObject
instance that implements a OBJECT tag from HTML.getName()
Gets the window name.Gets the next URL in the history.Gets the opener of the frame/window in the current context.Gets the parent of the frame/window in the current context.Gets the previous URL in the history.Gets the window status text.getTop()
Gets the top-most browser frame/window.Gets the user agent context.void
goToHistoryURL
(String url) Navigates to a URL in the history list.boolean
isClosed()
Gets a value indicating if the window is closed.boolean
This method should return true if and only if image loading needs to be enabled.boolean
isVisitedLink
(HTMLLinkElement link) It should return true if the link provided has been visited.void
linkClicked
(HTMLElement linkNode, URL url, String target) Performs a link click.void
moveInHistory
(int offset) Navigates the history according to the given offset.void
Navigates to the location given.boolean
onContextMenu
(HTMLElement element, MouseEvent event) This method is called when a visual element is right-clicked.boolean
onDoubleClick
(HTMLElement element, MouseEvent event) This method is called when there's a mouse double-click on an element.boolean
onMouseClick
(HTMLElement element, MouseEvent event) This method is called when there's a mouse click on an element.void
onMouseOut
(HTMLElement element, MouseEvent event) This method is called when the mouse no longer hovers a given element.void
onMouseOver
(HTMLElement element, MouseEvent event) This method is called when the mouse first hovers over an element.Deprecated.Opens a separate browser window and renders a URL.Shows a prompt dialog.void
reload()
Reloads the current document.void
resizeBy
(int byWidth, int byHeight) Resizes the window.void
resizeTo
(int width, int height) Resizes the window.void
scroll
(int x, int y) Scrolls the client area.void
scrollBy
(int x, int y) Scrolls the client area.void
setDefaultStatus
(String value) void
setOpener
(HtmlRendererContext opener) Sets the context that opened the current frame/window.void
Sets the window status text.void
Submits a HTML form.
-
Method Details
-
linkClicked
Performs a link click. Implementations should invokenavigate(URL, String)
.- Parameters:
linkNode
- The HTML node that was clicked.url
- The destination URL.target
- Same as the target attribute in the HTML anchor tag, i.e. _top, _blank, etc.
-
getFrames
HTMLCollection getFrames()Gets a collection of frames from the document currently in the context. -
submitForm
Submits a HTML form. Note that when the the method is "GET", parameters are still expected to be part offormInputs
.- Parameters:
method
- The request method, GET or POST.action
- The destination URL.target
- Same as the target attribute in the FORM tag, i.e. _blank, _top, etc.enctype
- The encoding type.formInputs
- An array ofFormInput
instances.
-
createBrowserFrame
BrowserFrame createBrowserFrame()Creates aBrowserFrame
instance. -
getUserAgentContext
UserAgentContext getUserAgentContext()Gets the user agent context. -
getHtmlObject
Gets aHtmlObject
instance that implements a OBJECT tag from HTML.- Parameters:
element
- The DOM element for the object, which may either represent an OBJECT, EMBED or an APPLET tag.- Returns:
- Implementations of this method must return
null
if they have any problems producing aHtmlObject
instance. This is particularly true of OBJECT tags, where inner HTML of the tag must be rendered if the OBJECT content cannot be handled.
-
onContextMenu
This method is called when a visual element is right-clicked.- Parameters:
element
- The narrowest element enclosing the mouse location.event
- The mouse event.- Returns:
- The method should return true to continue propagating the event, or false to stop propagating it.
-
onMouseClick
This method is called when there's a mouse click on an element.- Parameters:
element
- The narrowest element enclosing the mouse location.event
- The mouse event.- Returns:
- The method should return true to continue propagating the event, or false to stop propagating it.
-
onDoubleClick
This method is called when there's a mouse double-click on an element.- Parameters:
element
- The narrowest element enclosing the mouse location.event
- The mouse event.- Returns:
- The method should return true to continue propagating the event, or false to stop propagating it.
-
onMouseOver
This method is called when the mouse first hovers over an element.- Parameters:
element
- The element that the mouse has just entered.event
- The mouse event.
-
onMouseOut
This method is called when the mouse no longer hovers a given element.- Parameters:
element
- The element that the mouse has just exited.event
- The mouse event.
-
isImageLoadingEnabled
boolean isImageLoadingEnabled()This method should return true if and only if image loading needs to be enabled. -
alert
Opens an alert dialog.- Parameters:
message
- Message shown by the dialog.
-
back
void back()Goes to the previous page in the browser's history. -
blur
void blur()Relinquishes focus. -
close
void close()Closes the browser window, provided this is allowed for the current context. -
confirm
Opens a confirmation dialog.- Parameters:
message
- The message shown by the confirmation dialog.- Returns:
- True if the user selects YES.
-
focus
void focus()Requests focus for the current window. -
open
HtmlRendererContext open(String absoluteUrl, String windowName, String windowFeatures, boolean replace) Deprecated.Useopen(URL, String, String, boolean)
instead.Opens a separate browser window and renders a URL.- Parameters:
absoluteUrl
- The URL to be rendered.windowName
- The name of the new window.windowFeatures
- The features of the new window (same as in Javascript open method).replace
-- Returns:
- A new
HtmlRendererContext
instance.
-
open
Opens a separate browser window and renders a URL.- Parameters:
url
- The URL to be rendered.windowName
- The name of the new window.windowFeatures
- The features of the new window (same as in Javascript open method).replace
-- Returns:
- A new
HtmlRendererContext
instance.
-
prompt
Shows a prompt dialog.- Parameters:
message
- The message shown by the dialog.inputDefault
- The default input value.- Returns:
- The user's input value.
-
scroll
void scroll(int x, int y) Scrolls the client area.- Parameters:
x
- Document's x coordinate.y
- Document's y coordinate.
-
scrollBy
void scrollBy(int x, int y) Scrolls the client area.- Parameters:
x
- Horizontal pixels to scroll.y
- Vertical pixels to scroll.
-
resizeTo
void resizeTo(int width, int height) Resizes the window.- Parameters:
width
- The new width.height
- The new height.
-
resizeBy
void resizeBy(int byWidth, int byHeight) Resizes the window.- Parameters:
byWidth
- The number of pixels to resize the width by.byHeight
- The number of pixels to resize the height by.
-
isClosed
boolean isClosed()Gets a value indicating if the window is closed. -
getDefaultStatus
String getDefaultStatus() -
setDefaultStatus
-
getName
String getName()Gets the window name. -
getParent
HtmlRendererContext getParent()Gets the parent of the frame/window in the current context. -
getOpener
HtmlRendererContext getOpener()Gets the opener of the frame/window in the current context. -
setOpener
Sets the context that opened the current frame/window.- Parameters:
opener
- AHtmlRendererContext
.
-
getStatus
String getStatus()Gets the window status text. -
setStatus
Sets the window status text.- Parameters:
message
- A string.
-
getTop
HtmlRendererContext getTop()Gets the top-most browser frame/window. -
isVisitedLink
It should return true if the link provided has been visited. -
reload
void reload()Reloads the current document. -
getHistoryLength
int getHistoryLength()Gets the number of pages in the history list. -
getCurrentURL
String getCurrentURL()Gets the current URL in history. -
getNextURL
String getNextURL()Gets the next URL in the history. -
getPreviousURL
String getPreviousURL()Gets the previous URL in the history. -
forward
void forward()Goes forward one page. -
moveInHistory
void moveInHistory(int offset) Navigates the history according to the given offset. -
goToHistoryURL
Navigates to a URL in the history list.
open(URL, String, String, boolean)
instead.