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Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: richtext/richtexthtml.h
	3	// Purpose: interface of wxRichTextHTMLHandler
	4	// Author: wxWidgets team
	5	// RCS-ID: $Id$
	6	// Licence: wxWindows license
	7	/////////////////////////////////////////////////////////////////////////////
	8
	9	/**
	10	@class wxRichTextHTMLHandler
	11
	12	Handles HTML output (only) for wxRichTextCtrl content.
	13
	14	The most flexible way to use this class is to create a temporary object and call
	15	its functions directly, rather than use wxRichTextBuffer::SaveFile or
	16	wxRichTextCtrl::SaveFile.
	17
	18	Image handling requires a little extra work from the application, to choose an
	19	appropriate image format for the target HTML viewer and to clean up the temporary
	20	images later.
	21	If you are planning to load the HTML into a standard web browser, you can
	22	specify the handler flag wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64 (the default)
	23	and no extra work is required: the images will be written with the HTML.
	24
	25	However, if you want wxHTML compatibility, you will need to use
	26	@c wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY or
	27	@c wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES.
	28
	29	In this case, you must either call wxRichTextHTMLHandler::DeleteTemporaryImages
	30	before the next load operation, or you must store the image locations and
	31	delete them yourself when appropriate.
	32
	33	You can call wxRichTextHTMLHandler::GetTemporaryImageLocations to
	34	get the array of temporary image names.
	35
	36
	37	@section richtexthtmlhandler_flags Handler flags
	38
	39	The following flags can be used with this handler, via the handler's SetFlags()
	40	function or the buffer or control's SetHandlerFlags() function:
	41
	42	- wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_MEMORY
	43	Images are saved to the memory filesystem: suitable for showing wxHTML windows.
	44	- wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_FILES
	45	Images are saved to temporary files: suitable for showing in wxHTML windows.
	46	- wxRICHTEXT_HANDLER_SAVE_IMAGES_TO_BASE64
	47	Images are written with the HTML files in Base 64 format: suitable for showing
	48	in web browsers.
	49	- wxRICHTEXT_HANDLER_NO_HEADER_FOOTER
	50	Don't include header and footer tags (HTML, HEAD, BODY), so that the HTML
	51	can be used as part of a larger document.
	52	- wxRICHTEXT_HANDLER_USE_CSS
	53	Use CSS where possible, otherwise use workarounds that will show in wxHtmlWindow.
	54
	55	@library{wxrichtext}
	56	@category{richtext}
	57	*/
	58	class wxRichTextHTMLHandler : public wxRichTextFileHandler
	59	{
	60	public:
	61	/**
	62	Constructor.
	63	*/
	64	wxRichTextHTMLHandler(const wxString& name = "HTML",
	65	const wxString& ext = "html",
	66	int type = wxRICHTEXT_TYPE_HTML);
	67
	68	/**
	69	Clears the image locations generated by the last operation.
	70	*/
	71	void ClearTemporaryImageLocations();
	72
	73	/**
	74	Deletes the in-memory or temporary files generated by the last operation.
	75	*/
	76	bool DeleteTemporaryImages();
	77
	78	/**
	79	Delete the in-memory or temporary files generated by the last operation.
	80	This is a static function that can be used to delete the saved locations
	81	from an earlier operation, for example after the user has viewed the HTML file.
	82	*/
	83	static bool DeleteTemporaryImages(int flags,
	84	const wxArrayString& imageLocations);
	85
	86	/**
	87	Returns the mapping for converting point sizes to HTML font sizes.
	88	*/
	89	wxArrayInt GetFontSizeMapping() const;
	90
	91	/**
	92	Returns the directory used to store temporary image files.
	93	*/
	94	const wxString& GetTempDir() const;
	95
	96	/**
	97	Returns the image locations for the last operation.
	98	*/
	99	const wxArrayString& GetTemporaryImageLocations() const;
	100
	101	/**
	102	Reset the file counter, in case, for example, the same names are required each
	103	time.
	104	*/
	105	static void SetFileCounter(int counter);
	106
	107	/**
	108	Sets the mapping for converting point sizes to HTML font sizes.
	109
	110	There should be 7 elements, one for each HTML font size, each element
	111	specifying the maximum point size for that HTML font size.
	112	For example:
	113	@code
	114	wxArrayInt fontSizeMapping;
	115	fontSizeMapping.Add(7);
	116	fontSizeMapping.Add(9);
	117	fontSizeMapping.Add(11);
	118	fontSizeMapping.Add(12);
	119	fontSizeMapping.Add(14);
	120	fontSizeMapping.Add(22);
	121	fontSizeMapping.Add(100);
	122
	123	htmlHandler.SetFontSizeMapping(fontSizeMapping);
	124	@endcode
	125	*/
	126	void SetFontSizeMapping(const wxArrayInt& fontSizeMapping);
	127
	128	/**
	129	Sets the directory for storing temporary files.
	130	If empty, the system temporary directory will be used.
	131	*/
	132	void SetTempDir(const wxString& tempDir);
	133
	134	/**
	135	Sets the list of image locations generated by the last operation.
	136	*/
	137	void SetTemporaryImageLocations(const wxArrayString& locations);
	138
	139	protected:
	140	/**
	141	Saves the buffer content to the HTML stream.
	142	*/
	143	virtual bool DoSaveFile(wxRichTextBuffer* buffer, wxOutputStream& stream);
	144	};
	145