wxWidgets/interface/wx/webview.h

509 lines
15 KiB
Objective-C

/////////////////////////////////////////////////////////////////////////////
// Name: webview.h
// Purpose: interface of wxWebView
// Author: wxWidgets team
// RCS-ID: $Id$
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/**
Zoom levels availiable in wxWebView
*/
enum wxWebViewZoom
{
wxWEB_VIEW_ZOOM_TINY,
wxWEB_VIEW_ZOOM_SMALL,
wxWEB_VIEW_ZOOM_MEDIUM, //!< default size
wxWEB_VIEW_ZOOM_LARGE,
wxWEB_VIEW_ZOOM_LARGEST
};
/**
The type of zooming that the web view control can perform
*/
enum wxWebViewZoomType
{
/**
The entire layout scales when zooming, including images
*/
wxWEB_VIEW_ZOOM_TYPE_LAYOUT,
/**
Only the text changes in size when zooming, images and other layout
elements retain their initial size
*/
wxWEB_VIEW_ZOOM_TYPE_TEXT
};
/**
Types of errors that can cause navigation to fail
*/
enum wxWebNavigationError
{
/** Connection error (timeout, etc.) */
wxWEB_NAV_ERR_CONNECTION,
/** Invalid certificate */
wxWEB_NAV_ERR_CERTIFICATE,
/** Authentication required */
wxWEB_NAV_ERR_AUTH,
/** Other security error */
wxWEB_NAV_ERR_SECURITY,
/** Requested resource not found */
wxWEB_NAV_ERR_NOT_FOUND,
/** Invalid request/parameters (e.g. bad URL, bad protocol,
unsupported resource type) */
wxWEB_NAV_ERR_REQUEST,
/** The user cancelled (e.g. in a dialog) */
wxWEB_NAV_ERR_USER_CANCELLED,
/** Another (exotic) type of error that didn't fit in other categories*/
wxWEB_NAV_ERR_OTHER
};
/**
Type of refresh
*/
enum wxWebViewReloadFlags
{
/** Default reload, will access cache */
wxWEB_VIEW_RELOAD_DEFAULT,
/** Reload the current view without accessing the cache */
wxWEB_VIEW_RELOAD_NO_CACHE
};
/**
* List of available backends for wxWebView
*/
enum wxWebViewBackend
{
/** Value that may be passed to wxWebView to let it pick an appropriate
* engine for the current platform*/
wxWEB_VIEW_BACKEND_DEFAULT,
/** The OSX-native WebKit web engine */
wxWEB_VIEW_BACKEND_OSX_WEBKIT,
/** The GTK port of the WebKit engine */
wxWEB_VIEW_BACKEND_GTK_WEBKIT,
/** Use Microsoft Internet Explorer as web engine */
wxWEB_VIEW_BACKEND_IE
};
/**
@class wxWebHistoryItem
A simple class that contains the URL and title of an element of the history
of a wxWebView.
@library{wxweb}
@category{ctrl}
*/
class wxWebHistoryItem
{
public:
/**
Construtor.
*/
wxWebHistoryItem(const wxString& url, const wxString& title);
/**
@return The url of the page.
*/
wxString GetUrl();
/**
@return The title of the page.
*/
wxString GetTitle();
};
/**
@class wxWebView
This control may be used to render web (HTML / CSS / javascript) documents.
Capabilities of the HTML renderer will depend upon the backed.
TODO: describe each backend and its capabilities here
Note that errors are generally reported asynchronously though the
@c wxEVT_COMMAND_WEB_VIEW_ERROR event described below.
@beginEventEmissionTable{wxWebNavigationEvent}
@event{EVT_WEB_VIEW_NAVIGATING(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATING event, generated before trying
to get a resource. This event may be vetoed to prevent navigating to this
resource. Note that if the displayed HTML document has several frames, one
such event will be generated per frame.
@event{EVT_WEB_VIEW_NAVIGATED(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATED event generated after it was
confirmed that a resource would be requested. This event may not be vetoed.
Note that if the displayed HTML document has several frames, one such event
will be generated per frame.
@event{EVT_WEB_VIEW_LOADED(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_LOADED event generated when the document
is fully loaded and displayed.
@event{EVT_WEB_VIEW_ERRROR(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_ERROR event generated when a navigation
error occurs.
The integer associated with this event will be a wxWebNavigationError item.
The string associated with this event may contain a backend-specific more
precise error message/code.
@event{EVT_WEB_VIEW_NEWWINDOW(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_NEWWINDOW event, generated when a new
window is created. This event may be vetoed to prevent a new window showing,
for example if you want to open the url in the existing window or a new tab.
@endEventTable
@library{wxweb}
@category{ctrl}
*/
class wxWebView : public wxControl
{
public:
/**
Creation function for two-step creation.
*/
virtual bool Create(wxWindow* parent,
wxWindowID id,
const wxString& url,
const wxPoint& pos,
const wxSize& size,
long style,
const wxString& name) = 0;
/**
Factory function to create a new wxWebView for two-step creation
(you need to call wxWebView::Create on the returned object)
@param backend which web engine to use as backend for wxWebView
@return the created wxWebView, or NULL if the requested backend is
not available
*/
static wxWebView* New(wxWebViewBackend backend = wxWEB_VIEW_BACKEND_DEFAULT);
/**
Factory function to create a new wxWebView
@param parent parent window to create this view in
@param id ID of this control
@param url URL to load by default in the web view
@param pos position to create this control at
(you may use wxDefaultPosition if you use sizers)
@param size size to create this control with
(you may use wxDefaultSize if you use sizers)
@param backend which web engine to use as backend for wxWebView
@return the created wxWebView, or NULL if the requested backend
is not available
*/
static wxWebView* New(wxWindow* parent,
wxWindowID id,
const wxString& url = wxWebViewDefaultURLStr,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
wxWebViewBackend backend = wxWEB_VIEW_BACKEND_DEFAULT,
long style = 0,
const wxString& name = wxWebViewNameStr);
/**
Get the title of the current web page, or its URL/path if title is not
available.
*/
virtual wxString GetCurrentTitle() = 0;
/**
Get the URL of the currently displayed document.
*/
virtual wxString GetCurrentURL() = 0;
/**
Get the HTML source code of the currently displayed document.
@return The HTML source code, or an empty string if no page is currently
shown.
*/
virtual wxString GetPageSource() = 0;
/**
Returns whether the web control is currently busy (e.g. loading a page).
*/
virtual bool IsBusy() = 0;
/**
Load a web page from a URL
@param url The URL of the page to be loaded.
@note Web engines generally report errors asynchronously, so if you wish
to know whether loading the URL was successful, register to receive
navigation error events.
*/
virtual void LoadUrl(const wxString& url) = 0;
/**
Opens a print dialog so that the user may print the currently
displayed page.
*/
virtual void Print() = 0;
/**
Reload the currently displayed URL.
@param flags A bit array that may optionally contain reload options.
*/
virtual void Reload(wxWebViewReloadFlags flags = wxWEB_VIEW_RELOAD_DEFAULT) = 0;
/**
Set the displayed page source to the contents of the given string.
@param html The string that contains the HTML data to display.
@param baseUrl URL assigned to the HTML data, to be used to resolve
relative paths, for instance.
*/
virtual void SetPage(const wxString& html, const wxString& baseUrl) = 0;
/**
Set the displayed page source to the contents of the given stream.
@param html The stream to read HTML data from.
@param baseUrl URL assigned to the HTML data, to be used to resolve
relative paths, for instance.
*/
virtual void SetPage(wxInputStream& html, wxString baseUrl)
{
wxStringOutputStream stream;
stream.Write(html);
SetPage(stream.GetString(), baseUrl);
}
/**
Stop the current page loading process, if any.
May trigger an error event of type @c wxWEB_NAV_ERR_USER_CANCELLED.
TODO: make @c wxWEB_NAV_ERR_USER_CANCELLED errors uniform across ports.
*/
virtual void Stop() = 0;
/**
@name Clipboard
*/
/**
Returns @true if the current selection can be copied.
*/
virtual bool CanCopy() = 0;
/**
Returns @true if the current selection can be cut.
*/
virtual bool CanCut() = 0;
/**
Returns @true if data can be pasted.
*/
virtual bool CanPaste() = 0;
/**
Copies the current selection.
*/
virtual void Copy() = 0;
/**
Cuts the current selection.
*/
virtual void Cut() = 0;
/**
Pastes the current data.
*/
virtual void Paste() = 0;
/**
@name History
*/
/**
Returns @true if it is possible to navigate backward in the history of
visited pages.
*/
virtual bool CanGoBack() = 0;
/**
Returns @true if it is possible to navigate forward in the history of
visited pages.
*/
virtual bool CanGoForward() = 0;
/**
Clear the history, this will also remove the visible page.
*/
virtual void ClearHistory() = 0;
/**
Enable or disable the history. This will also clear the history.
*/
virtual void EnableHistory(bool enable = true) = 0;
/**
Returns a list of items in the back history. The first item in the
vector is the first page that was loaded by the control.
*/
virtual wxVector<wxSharedPtr<wxWebHistoryItem> > GetBackwardHistory() = 0;
/**
Returns a list of items in the forward history. The first item in the
vector is the next item in the history with respect to the curently
loaded page.
*/
virtual wxVector<wxSharedPtr<wxWebHistoryItem> > GetForwardHistory() = 0;
/**
Navigate back in the history of visited pages.
Only valid if CanGoBack() returns true.
*/
virtual void GoBack() = 0;
/**
Navigate forward in the history of visited pages.
Only valid if CanGoForward() returns true.
*/
virtual void GoForward() = 0;
/**
Loads a history item.
*/
virtual void LoadHistoryItem(wxSharedPtr<wxWebHistoryItem> item) = 0;
/**
@name Undo / Redo
*/
/**
Returns @true if there is an action to redo.
*/
virtual bool CanRedo() = 0;
/**
Returns @true if there is an action to undo.
*/
virtual bool CanUndo() = 0;
/**
Redos the last action.
*/
virtual void Redo() = 0;
/**
Undos the last action.
*/
virtual void Undo() = 0;
/**
@name Zoom
*/
/**
Retrieve whether the current HTML engine supports a zoom type.
@param type The zoom type to test.
@return Whether this type of zoom is supported by this HTML engine
(and thus can be set through SetZoomType()).
*/
virtual bool CanSetZoomType(wxWebViewZoomType type) const = 0;
/**
Get the zoom factor of the page.
@return The current level of zoom.
*/
virtual wxWebViewZoom GetZoom() = 0;
/**
Get how the zoom factor is currently interpreted.
@return How the zoom factor is currently interpreted by the HTML engine.
*/
virtual wxWebViewZoomType GetZoomType() const = 0;
/**
Set the zoom factor of the page.
@param zoom How much to zoom (scale) the HTML document.
*/
virtual void SetZoom(wxWebViewZoom zoom) = 0;
/**
Set how to interpret the zoom factor.
@param zoomType How the zoom factor should be interpreted by the
HTML engine.
@note invoke CanSetZoomType() first, some HTML renderers may not
support all zoom types.
*/
virtual void SetZoomType(wxWebViewZoomType zoomType) = 0;
};
/**
@class wxWebNavigationEvent
A navigation event holds information about events associated with
wxWebView objects.
@beginEventEmissionTable{wxWebNavigationEvent}
@event{EVT_WEB_VIEW_NAVIGATING(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATING event, generated before trying
to get a resource. This event may be vetoed to prevent navigating to this
resource. Note that if the displayed HTML document has several frames, one
such event will be generated per frame.
@event{EVT_WEB_VIEW_NAVIGATED(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_NAVIGATED event generated after it was
confirmed that a resource would be requested. This event may not be vetoed.
Note that if the displayed HTML document has several frames, one such event
will be generated per frame.
@event{EVT_WEB_VIEW_LOADED(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_LOADED event generated when the document
is fully loaded and displayed.
@event{EVT_WEB_VIEW_ERRROR(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_ERROR event generated when a navigation
error occurs.
The integer associated with this event will be a wxWebNavigationError item.
The string associated with this event may contain a backend-specific more
precise error message/code.
@event{EVT_WEB_VIEW_NEWWINDOW(id, func)}
Process a @c wxEVT_COMMAND_WEB_VIEW_NEWWINDOW event, generated when a new
window is created. This event may be vetoed to prevent a new window showing,
for example if you want to open the url in the existing window or a new tab.
@endEventTable
@library{wxweb}
@category{events}
@see wxWebView
*/
class wxWebNavigationEvent : public wxCommandEvent
{
public:
wxWebNavigationEvent();
wxWebNavigationEvent(wxEventType type, int id, const wxString href,
const wxString target, bool canVeto);
/**
Get the URL being visited
*/
const wxString& GetHref() const { return m_href; }
/**
Get the target (frame or window) in which the URL that caused this event
is viewed, or an empty string if not available.
*/
const wxString& GetTarget() const;
virtual wxEvent* Clone() const;
/**
Get whether this event may be vetoed (stopped/prevented). Only
meaningful for events fired before navigation takes place or new
window events.
*/
bool CanVeto() const;
/**
Whether this event was vetoed (stopped/prevented). Only meaningful for
events fired before navigation takes place or new window events.
*/
bool IsVetoed() const;
/**
Veto (prevent/stop) this event. Only meaningful for events fired
before navigation takes place or new window events. Only valid
if CanVeto() returned true.
*/
void Veto();
};