1 /////////////////////////////////////////////////////////////////////////////
2 // Name: wx/html/htmlwin.h
3 // Purpose: wxHtmlWindow class for parsing & displaying HTML
4 // Author: Vaclav Slavik
5 // Copyright: (c) 1999 Vaclav Slavik
6 // Licence: wxWindows licence
7 /////////////////////////////////////////////////////////////////////////////
10 #define _WX_HTMLWIN_H_
15 #include "wx/window.h"
16 #include "wx/scrolwin.h"
17 #include "wx/config.h"
18 #include "wx/stopwatch.h"
19 #include "wx/html/winpars.h"
20 #include "wx/html/htmlcell.h"
21 #include "wx/filesys.h"
22 #include "wx/html/htmlfilt.h"
23 #include "wx/filename.h"
24 #include "wx/bitmap.h"
26 class wxHtmlProcessor
;
27 class wxHtmlWinModule
;
28 class wxHtmlHistoryArray
;
29 class wxHtmlProcessorList
;
30 class WXDLLIMPEXP_FWD_HTML wxHtmlWinAutoScrollTimer
;
31 class WXDLLIMPEXP_FWD_HTML wxHtmlCellEvent
;
32 class WXDLLIMPEXP_FWD_HTML wxHtmlLinkEvent
;
33 class WXDLLIMPEXP_FWD_CORE wxStatusBar
;
35 // wxHtmlWindow flags:
36 #define wxHW_SCROLLBAR_NEVER 0x0002
37 #define wxHW_SCROLLBAR_AUTO 0x0004
38 #define wxHW_NO_SELECTION 0x0008
40 #define wxHW_DEFAULT_STYLE wxHW_SCROLLBAR_AUTO
42 /// Enum for wxHtmlWindow::OnOpeningURL and wxHtmlWindowInterface::OnOpeningURL
43 enum wxHtmlOpeningStatus
45 /// Open the requested URL
47 /// Do not open the URL
49 /// Redirect to another URL (returned from OnOpeningURL)
54 Abstract interface to a HTML rendering window (such as wxHtmlWindow or
55 wxHtmlListBox) that is passed to wxHtmlWinParser. It encapsulates all
56 communication from the parser to the window.
58 class WXDLLIMPEXP_HTML wxHtmlWindowInterface
62 wxHtmlWindowInterface() {}
63 virtual ~wxHtmlWindowInterface() {}
66 Called by the parser to set window's title to given text.
68 virtual void SetHTMLWindowTitle(const wxString
& title
) = 0;
71 Called when a link is clicked.
73 @param link information about the clicked link
75 virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo
& link
) = 0;
78 Called when the parser needs to open another URL (e.g. an image).
80 @param type Type of the URL request (e.g. image)
81 @param url URL the parser wants to open
82 @param redirect If the return value is wxHTML_REDIRECT, then the
83 URL to redirect to will be stored in this variable
84 (the pointer must never be NULL)
86 @return indicator of how to treat the request
88 virtual wxHtmlOpeningStatus
OnHTMLOpeningURL(wxHtmlURLType type
,
90 wxString
*redirect
) const = 0;
93 Converts coordinates @a pos relative to given @a cell to
94 physical coordinates in the window.
96 virtual wxPoint
HTMLCoordsToWindow(wxHtmlCell
*cell
,
97 const wxPoint
& pos
) const = 0;
99 /// Returns the window used for rendering (may be NULL).
100 virtual wxWindow
* GetHTMLWindow() = 0;
102 /// Returns background colour to use by default.
103 virtual wxColour
GetHTMLBackgroundColour() const = 0;
105 /// Sets window's background to colour @a clr.
106 virtual void SetHTMLBackgroundColour(const wxColour
& clr
) = 0;
108 /// Sets window's background to given bitmap.
109 virtual void SetHTMLBackgroundImage(const wxBitmap
& bmpBg
) = 0;
111 /// Sets status bar text.
112 virtual void SetHTMLStatusText(const wxString
& text
) = 0;
114 /// Type of mouse cursor
117 /// Standard mouse cursor (typically an arrow)
119 /// Cursor shown over links
121 /// Cursor shown over selectable text
126 Returns mouse cursor of given @a type.
128 virtual wxCursor
GetHTMLCursor(HTMLCursor type
) const = 0;
132 Helper class that implements part of mouse handling for wxHtmlWindow and
133 wxHtmlListBox. Cursor changes and clicking on links are handled, text
136 class WXDLLIMPEXP_HTML wxHtmlWindowMouseHelper
142 @param iface Interface to the owner window.
144 wxHtmlWindowMouseHelper(wxHtmlWindowInterface
*iface
);
149 It is not really needed in this case but at leats it prevents gcc from
150 complaining about its absence.
152 virtual ~wxHtmlWindowMouseHelper() { }
154 /// Returns true if the mouse moved since the last call to HandleIdle
155 bool DidMouseMove() const { return m_tmpMouseMoved
; }
157 /// Call this from EVT_MOTION event handler
158 void HandleMouseMoved();
161 Call this from EVT_LEFT_UP handler (or, alternatively, EVT_LEFT_DOWN).
163 @param rootCell HTML cell inside which the click occured. This doesn't
164 have to be the leaf cell, it can be e.g. toplevel
165 container, but the mouse must be inside the container's
166 area, otherwise the event would be ignored.
167 @param pos Mouse position in coordinates relative to @a cell
168 @param event The event that triggered the call
170 bool HandleMouseClick(wxHtmlCell
*rootCell
,
171 const wxPoint
& pos
, const wxMouseEvent
& event
);
174 Call this from OnInternalIdle of the HTML displaying window. Handles
175 mouse movements and must be used together with HandleMouseMoved.
177 @param rootCell HTML cell inside which the click occured. This doesn't
178 have to be the leaf cell, it can be e.g. toplevel
179 container, but the mouse must be inside the container's
180 area, otherwise the event would be ignored.
181 @param pos Current mouse position in coordinates relative to
184 void HandleIdle(wxHtmlCell
*rootCell
, const wxPoint
& pos
);
187 Called by HandleIdle when the mouse hovers over a cell. Default
188 behaviour is to do nothing.
190 @param cell the cell the mouse is over
191 @param x, y coordinates of mouse relative to the cell
193 virtual void OnCellMouseHover(wxHtmlCell
*cell
, wxCoord x
, wxCoord y
);
196 Called by HandleMouseClick when the user clicks on a cell.
197 Default behaviour is to call wxHtmlWindowInterface::OnLinkClicked()
198 if this cell corresponds to a hypertext link.
200 @param cell the cell the mouse is over
201 @param x, y coordinates of mouse relative to the cell
202 @param event The event that triggered the call
205 @return true if a link was clicked, false otherwise.
207 virtual bool OnCellClicked(wxHtmlCell
*cell
,
208 wxCoord x
, wxCoord y
,
209 const wxMouseEvent
& event
);
212 // this flag indicates if the mouse moved (used by HandleIdle)
213 bool m_tmpMouseMoved
;
214 // contains last link name
215 wxHtmlLinkInfo
*m_tmpLastLink
;
216 // contains the last (terminal) cell which contained the mouse
217 wxHtmlCell
*m_tmpLastCell
;
220 wxHtmlWindowInterface
*m_interface
;
223 // ----------------------------------------------------------------------------
225 // (This is probably the only class you will directly use.)
226 // Purpose of this class is to display HTML page (either local
227 // file or downloaded via HTTP protocol) in a window. Width of
228 // window is constant - given in constructor - virtual height
229 // is changed dynamically depending on page size. Once the
230 // window is created you can set its content by calling
231 // SetPage(text) or LoadPage(filename).
232 // ----------------------------------------------------------------------------
234 class WXDLLIMPEXP_HTML wxHtmlWindow
: public wxScrolledWindow
,
235 public wxHtmlWindowInterface
,
236 public wxHtmlWindowMouseHelper
238 DECLARE_DYNAMIC_CLASS(wxHtmlWindow
)
239 friend class wxHtmlWinModule
;
242 wxHtmlWindow() : wxHtmlWindowMouseHelper(this) { Init(); }
243 wxHtmlWindow(wxWindow
*parent
, wxWindowID id
= wxID_ANY
,
244 const wxPoint
& pos
= wxDefaultPosition
,
245 const wxSize
& size
= wxDefaultSize
,
246 long style
= wxHW_DEFAULT_STYLE
,
247 const wxString
& name
= wxT("htmlWindow"))
248 : wxHtmlWindowMouseHelper(this)
251 Create(parent
, id
, pos
, size
, style
, name
);
253 virtual ~wxHtmlWindow();
255 bool Create(wxWindow
*parent
, wxWindowID id
= wxID_ANY
,
256 const wxPoint
& pos
= wxDefaultPosition
,
257 const wxSize
& size
= wxDefaultSize
,
258 long style
= wxHW_SCROLLBAR_AUTO
,
259 const wxString
& name
= wxT("htmlWindow"));
261 // Set HTML page and display it. !! source is HTML document itself,
262 // it is NOT address/filename of HTML document. If you want to
263 // specify document location, use LoadPage() istead
264 // Return value : false if an error occurred, true otherwise
265 virtual bool SetPage(const wxString
& source
);
267 // Append to current page
268 bool AppendToPage(const wxString
& source
);
270 // Load HTML page from given location. Location can be either
271 // a) /usr/wxGTK2/docs/html/wx.htm
272 // b) http://www.somewhere.uk/document.htm
273 // c) ftp://ftp.somesite.cz/pub/something.htm
274 // In case there is no prefix (http:,ftp:), the method
275 // will try to find it itself (1. local file, then http or ftp)
276 // After the page is loaded, the method calls SetPage() to display it.
277 // Note : you can also use path relative to previously loaded page
278 // Return value : same as SetPage
279 virtual bool LoadPage(const wxString
& location
);
281 // Loads HTML page from file
282 bool LoadFile(const wxFileName
& filename
);
284 // Returns full location of opened page
285 wxString
GetOpenedPage() const {return m_OpenedPage
;}
286 // Returns anchor within opened page
287 wxString
GetOpenedAnchor() const {return m_OpenedAnchor
;}
288 // Returns <TITLE> of opened page or empty string otherwise
289 wxString
GetOpenedPageTitle() const {return m_OpenedPageTitle
;}
291 // Sets frame in which page title will be displayed. Format is format of
292 // frame title, e.g. "HtmlHelp : %s". It must contain exactly one %s
293 void SetRelatedFrame(wxFrame
* frame
, const wxString
& format
);
294 wxFrame
* GetRelatedFrame() const {return m_RelatedFrame
;}
297 // After(!) calling SetRelatedFrame, this sets statusbar slot where messages
298 // will be displayed. Default is -1 = no messages.
299 void SetRelatedStatusBar(int index
);
300 void SetRelatedStatusBar(wxStatusBar
*, int index
= 0);
301 #endif // wxUSE_STATUSBAR
303 // Sets fonts to be used when displaying HTML page.
304 void SetFonts(const wxString
& normal_face
, const wxString
& fixed_face
,
305 const int *sizes
= NULL
);
307 // Sets font sizes to be relative to the given size or the system
308 // default size; use either specified or default font
309 void SetStandardFonts(int size
= -1,
310 const wxString
& normal_face
= wxEmptyString
,
311 const wxString
& fixed_face
= wxEmptyString
);
313 // Sets space between text and window borders.
314 void SetBorders(int b
) {m_Borders
= b
;}
316 // Sets the bitmap to use for background (currnetly it will be tiled,
317 // when/if we have CSS support we could add other possibilities...)
318 void SetBackgroundImage(const wxBitmap
& bmpBg
) { m_bmpBg
= bmpBg
; }
321 // Saves custom settings into cfg config. it will use the path 'path'
322 // if given, otherwise it will save info into currently selected path.
323 // saved values : things set by SetFonts, SetBorders.
324 virtual void ReadCustomization(wxConfigBase
*cfg
, wxString path
= wxEmptyString
);
326 virtual void WriteCustomization(wxConfigBase
*cfg
, wxString path
= wxEmptyString
);
327 #endif // wxUSE_CONFIG
329 // Goes to previous/next page (in browsing history)
330 // Returns true if successful, false otherwise
332 bool HistoryForward();
333 bool HistoryCanBack();
334 bool HistoryCanForward();
338 // Returns pointer to conteiners/cells structure.
339 // It should be used ONLY when printing
340 wxHtmlContainerCell
* GetInternalRepresentation() const {return m_Cell
;}
343 static void AddFilter(wxHtmlFilter
*filter
);
345 // Returns a pointer to the parser.
346 wxHtmlWinParser
*GetParser() const { return m_Parser
; }
348 // Adds HTML processor to this instance of wxHtmlWindow:
349 void AddProcessor(wxHtmlProcessor
*processor
);
350 // Adds HTML processor to wxHtmlWindow class as whole:
351 static void AddGlobalProcessor(wxHtmlProcessor
*processor
);
356 // Sets the title of the window
357 // (depending on the information passed to SetRelatedFrame() method)
358 virtual void OnSetTitle(const wxString
& title
);
360 // Called when user clicked on hypertext link. Default behaviour is to
361 // call LoadPage(loc)
362 virtual void OnLinkClicked(const wxHtmlLinkInfo
& link
);
364 // Called when wxHtmlWindow wants to fetch data from an URL (e.g. when
365 // loading a page or loading an image). The data are downloaded if and only if
366 // OnOpeningURL returns true. If OnOpeningURL returns wxHTML_REDIRECT,
367 // it must set *redirect to the new URL
368 virtual wxHtmlOpeningStatus
OnOpeningURL(wxHtmlURLType
WXUNUSED(type
),
369 const wxString
& WXUNUSED(url
),
370 wxString
*WXUNUSED(redirect
)) const
371 { return wxHTML_OPEN
; }
374 // Helper functions to select parts of page:
375 void SelectWord(const wxPoint
& pos
);
376 void SelectLine(const wxPoint
& pos
);
379 // Convert selection to text:
380 wxString
SelectionToText() { return DoSelectionToText(m_selection
); }
382 // Converts current page to text:
384 #endif // wxUSE_CLIPBOARD
386 virtual void OnInternalIdle();
388 /// Returns standard HTML cursor as used by wxHtmlWindow
389 static wxCursor
GetDefaultHTMLCursor(HTMLCursor type
);
394 // Scrolls to anchor of this name. (Anchor is #news
395 // or #features etc. it is part of address sometimes:
396 // http://www.ms.mff.cuni.cz/~vsla8348/wxhtml/index.html#news)
397 // Return value : true if anchor exists, false otherwise
398 bool ScrollToAnchor(const wxString
& anchor
);
400 // Prepares layout (= fill m_PosX, m_PosY for fragments) based on
401 // actual size of window. This method also setup scrollbars
404 void OnPaint(wxPaintEvent
& event
);
405 void OnEraseBackground(wxEraseEvent
& event
);
406 void OnSize(wxSizeEvent
& event
);
407 void OnMouseMove(wxMouseEvent
& event
);
408 void OnMouseDown(wxMouseEvent
& event
);
409 void OnMouseUp(wxMouseEvent
& event
);
411 void OnKeyUp(wxKeyEvent
& event
);
412 void OnDoubleClick(wxMouseEvent
& event
);
413 void OnCopy(wxCommandEvent
& event
);
414 void OnClipboardEvent(wxClipboardTextEvent
& event
);
415 void OnMouseEnter(wxMouseEvent
& event
);
416 void OnMouseLeave(wxMouseEvent
& event
);
417 void OnMouseCaptureLost(wxMouseCaptureLostEvent
& event
);
418 #endif // wxUSE_CLIPBOARD
420 // Returns new filter (will be stored into m_DefaultFilter variable)
421 virtual wxHtmlFilter
*GetDefaultFilter() {return new wxHtmlFilterPlainText
;}
423 // cleans static variables
424 static void CleanUpStatics();
426 // Returns true if text selection is enabled (wxClipboard must be available
427 // and wxHW_NO_SELECTION not used)
428 bool IsSelectionEnabled() const;
436 // Copies selection to clipboard if the clipboard support is available
438 // returns true if anything was copied to clipboard, false otherwise
439 bool CopySelection(ClipboardType t
= Secondary
);
442 // Automatic scrolling during selection:
443 void StopAutoScrolling();
444 #endif // wxUSE_CLIPBOARD
446 wxString
DoSelectionToText(wxHtmlSelection
*sel
);
449 // wxHtmlWindowInterface methods:
450 virtual void SetHTMLWindowTitle(const wxString
& title
);
451 virtual void OnHTMLLinkClicked(const wxHtmlLinkInfo
& link
);
452 virtual wxHtmlOpeningStatus
OnHTMLOpeningURL(wxHtmlURLType type
,
454 wxString
*redirect
) const;
455 virtual wxPoint
HTMLCoordsToWindow(wxHtmlCell
*cell
,
456 const wxPoint
& pos
) const;
457 virtual wxWindow
* GetHTMLWindow();
458 virtual wxColour
GetHTMLBackgroundColour() const;
459 virtual void SetHTMLBackgroundColour(const wxColour
& clr
);
460 virtual void SetHTMLBackgroundImage(const wxBitmap
& bmpBg
);
461 virtual void SetHTMLStatusText(const wxString
& text
);
462 virtual wxCursor
GetHTMLCursor(HTMLCursor type
) const;
464 // implementation of SetPage()
465 bool DoSetPage(const wxString
& source
);
468 // This is pointer to the first cell in parsed data. (Note: the first cell
469 // is usually top one = all other cells are sub-cells of this one)
470 wxHtmlContainerCell
*m_Cell
;
471 // parser which is used to parse HTML input.
472 // Each wxHtmlWindow has its own parser because sharing one global
473 // parser would be problematic (because of reentrancy)
474 wxHtmlWinParser
*m_Parser
;
475 // contains name of actually opened page or empty string if no page opened
476 wxString m_OpenedPage
;
477 // contains name of current anchor within m_OpenedPage
478 wxString m_OpenedAnchor
;
479 // contains title of actually opened page or empty string if no <TITLE> tag
480 wxString m_OpenedPageTitle
;
481 // class for opening files (file system)
484 // frame in which page title should be displayed & number of its statusbar
485 // reserved for usage with this html window
486 wxFrame
*m_RelatedFrame
;
488 int m_RelatedStatusBarIndex
;
489 wxStatusBar
* m_RelatedStatusBar
;
490 #endif // wxUSE_STATUSBAR
491 wxString m_TitleFormat
;
493 // borders (free space between text and window borders)
494 // defaults to 10 pixels.
497 // current text selection or NULL
498 wxHtmlSelection
*m_selection
;
500 // true if the user is dragging mouse to select text
501 bool m_makingSelection
;
504 // time of the last doubleclick event, used to detect tripleclicks
505 // (tripleclicks are used to select whole line):
506 wxMilliClock_t m_lastDoubleClick
;
508 // helper class to automatically scroll the window if the user is selecting
509 // text and the mouse leaves wxHtmlWindow:
510 wxHtmlWinAutoScrollTimer
*m_timerAutoScroll
;
511 #endif // wxUSE_CLIPBOARD
514 // erase the window background using m_bmpBg or just solid colour if we
515 // don't have any background image
516 void DoEraseBackground(wxDC
& dc
);
518 // window content for double buffered rendering, may be invalid until it is
519 // really initialized in OnPaint()
520 wxBitmap m_backBuffer
;
522 // background image, may be invalid
525 // variables used when user is selecting text
526 wxPoint m_tmpSelFromPos
;
527 wxHtmlCell
*m_tmpSelFromCell
;
529 // if >0 contents of the window is not redrawn
530 // (in order to avoid ugly blinking)
531 int m_tmpCanDrawLocks
;
533 // list of HTML filters
534 static wxList m_Filters
;
535 // this filter is used when no filter is able to read some file
536 static wxHtmlFilter
*m_DefaultFilter
;
538 // html processors array:
539 wxHtmlProcessorList
*m_Processors
;
540 static wxHtmlProcessorList
*m_GlobalProcessors
;
543 wxHtmlHistoryArray
*m_History
;
545 // if this FLAG is false, items are not added to history
548 // Flag used to communicate between OnPaint() and OnEraseBackground(), see
549 // the comments near its use.
550 bool m_isBgReallyErased
;
552 // standard mouse cursors
553 static wxCursor
*ms_cursorLink
;
554 static wxCursor
*ms_cursorText
;
556 DECLARE_EVENT_TABLE()
557 wxDECLARE_NO_COPY_CLASS(wxHtmlWindow
);
560 class WXDLLIMPEXP_FWD_HTML wxHtmlCellEvent
;
562 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_HTML
, wxEVT_HTML_CELL_CLICKED
, wxHtmlCellEvent
);
563 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_HTML
, wxEVT_HTML_CELL_HOVER
, wxHtmlCellEvent
);
564 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_HTML
, wxEVT_HTML_LINK_CLICKED
, wxHtmlLinkEvent
);
568 * Html cell window event
571 class WXDLLIMPEXP_HTML wxHtmlCellEvent
: public wxCommandEvent
575 wxHtmlCellEvent(wxEventType commandType
, int id
,
576 wxHtmlCell
*cell
, const wxPoint
&pt
,
577 const wxMouseEvent
&ev
)
578 : wxCommandEvent(commandType
, id
)
583 m_bLinkWasClicked
= false;
586 wxHtmlCell
* GetCell() const { return m_cell
; }
587 wxPoint
GetPoint() const { return m_pt
; }
588 wxMouseEvent
GetMouseEvent() const { return m_mouseEvent
; }
590 void SetLinkClicked(bool linkclicked
) { m_bLinkWasClicked
=linkclicked
; }
591 bool GetLinkClicked() const { return m_bLinkWasClicked
; }
593 // default copy ctor, assignment operator and dtor are ok
594 virtual wxEvent
*Clone() const { return new wxHtmlCellEvent(*this); }
598 wxMouseEvent m_mouseEvent
;
601 bool m_bLinkWasClicked
;
603 DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHtmlCellEvent
)
612 class WXDLLIMPEXP_HTML wxHtmlLinkEvent
: public wxCommandEvent
616 wxHtmlLinkEvent(int id
, const wxHtmlLinkInfo
&linkinfo
)
617 : wxCommandEvent(wxEVT_HTML_LINK_CLICKED
, id
)
619 m_linkInfo
= linkinfo
;
622 const wxHtmlLinkInfo
&GetLinkInfo() const { return m_linkInfo
; }
624 // default copy ctor, assignment operator and dtor are ok
625 virtual wxEvent
*Clone() const { return new wxHtmlLinkEvent(*this); }
628 wxHtmlLinkInfo m_linkInfo
;
630 DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHtmlLinkEvent
)
634 typedef void (wxEvtHandler::*wxHtmlCellEventFunction
)(wxHtmlCellEvent
&);
635 typedef void (wxEvtHandler::*wxHtmlLinkEventFunction
)(wxHtmlLinkEvent
&);
637 #define wxHtmlCellEventHandler(func) \
638 wxEVENT_HANDLER_CAST(wxHtmlCellEventFunction, func)
639 #define wxHtmlLinkEventHandler(func) \
640 wxEVENT_HANDLER_CAST(wxHtmlLinkEventFunction, func)
642 #define EVT_HTML_CELL_CLICKED(id, fn) \
643 wx__DECLARE_EVT1(wxEVT_HTML_CELL_CLICKED, id, wxHtmlCellEventHandler(fn))
644 #define EVT_HTML_CELL_HOVER(id, fn) \
645 wx__DECLARE_EVT1(wxEVT_HTML_CELL_HOVER, id, wxHtmlCellEventHandler(fn))
646 #define EVT_HTML_LINK_CLICKED(id, fn) \
647 wx__DECLARE_EVT1(wxEVT_HTML_LINK_CLICKED, id, wxHtmlLinkEventHandler(fn))
650 // old wxEVT_COMMAND_* constants
651 #define wxEVT_COMMAND_HTML_CELL_CLICKED wxEVT_HTML_CELL_CLICKED
652 #define wxEVT_COMMAND_HTML_CELL_HOVER wxEVT_HTML_CELL_HOVER
653 #define wxEVT_COMMAND_HTML_LINK_CLICKED wxEVT_HTML_LINK_CLICKED
657 #endif // _WX_HTMLWIN_H_