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Diffstat (limited to 'WWW/Library/Implementation/HTStyle.h')
| -rw-r--r-- | WWW/Library/Implementation/HTStyle.h | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/WWW/Library/Implementation/HTStyle.h b/WWW/Library/Implementation/HTStyle.h new file mode 100644 index 0000000..79ba003 --- /dev/null +++ b/WWW/Library/Implementation/HTStyle.h @@ -0,0 +1,241 @@ +/* + * $LynxId: HTStyle.h,v 1.18 2020/01/21 22:02:35 tom Exp $ + HTStyle: Style management for libwww + STYLE DEFINITION FOR HYPERTEXT + + Styles allow the translation between a logical property of a piece of text + and its physical representation. + + A StyleSheet is a collection of styles, defining the translation necessary + to represent a document. It is a linked list of styles. + +Overriding this module + + Why is the style structure declared in the HTStyle.h module, instead of + having the user browser define the structure, and the HTStyle routines just + use sizeof() for copying? + + It's not obvious whether HTStyle.c should be common code. It's useful to + have common code for loading style sheets, especially if the movement toward + standard style sheets gets going. + + If it IS common code, then both the hypertext object and HTStyle.c must know + the structure of a style, so HTStyle.h is a suitable place to put that. + HTStyle.c has to be compiled with a knowledge of the + + It we take it out of the library, then of course HTStyle could be declared + as an undefined structure. The only references to it are in the + structure-flattening code HTML.c and HTPlain.c, which only use + HTStypeNamed(). + + You can in any case override this function in your own code, which will + prevent the HTStyle from being loaded. You will be able to redefine your + style structure in this case without problems, as no other moule needs to + know it. + + */ +#ifndef HTStyle_H +#define HTStyle_H + +#include <HTAnchor.h> + +typedef long int HTFont; /* Dummy definition instead */ + +#ifdef NeXT_suppressed +#include <appkit/appkit.h> +typedef NXCoord HTCoord; + +#define HTParagraphStyle NXTextStyle +#define HTCoord NXCoord +typedef struct _color { + float grey; + int RGBColor; +} HTColor; + +#else + +typedef int HTCoord; /* changed from float to int - kw */ + +typedef struct _HTParagraphStyle { + HTCoord left_indent; /* @@@@ junk! etc etc */ +} HTParagraphStyle; + +typedef int HTColor; /* Sorry about the US spelling! */ + +#endif + +#ifdef __cplusplus +extern "C" { +#endif +#define STYLE_NAME_LENGTH 80 /* @@@@@@@@@@@ */ + typedef struct { + short kind; /* only NX_LEFTTAB implemented */ + HTCoord position; /* x coordinate for stop */ + } HTTabStop; + +/* The Style Structure + * ------------------- + */ + + typedef struct _HTStyle { + +/* Style management information +*/ + struct _HTStyle *next; /* Link for putting into stylesheet */ + char *w_name; /* Style name */ + const char *c_name; /* Style name */ + int id; /* equivalent of name, for speed */ + char *w_SGMLTag; /* Tag name to start */ + const char *c_SGMLTag; /* Tag name to start */ + +/* Character attributes (a la NXRun) +*/ + HTFont font; /* Font id */ + HTCoord fontSize; /* The size of font, not independent */ + HTColor color; /* text gray of current run */ + int superscript; /* superscript (-sub) in points */ + + HTAnchor *anchor; /* Anchor id if any, else zero */ + +/* Paragraph Attributes (a la NXTextStyle) +*/ + HTCoord indent1st; /* how far first line in paragraph is + * indented */ + HTCoord leftIndent; /* how far second line is indented */ + HTCoord rightIndent; /* (Missing from NeXT version */ + short alignment; /* quad justification */ + HTCoord lineHt; /* line height */ + HTCoord descentLine; /* descender bottom from baseline */ + const HTTabStop *tabs; /* array of tab stops, 0 terminated */ + + BOOL wordWrap; /* Yes means wrap at space not char */ + BOOL freeFormat; /* Yes means \n is just white space */ + HTCoord spaceBefore; /* Omissions from NXTextStyle */ + HTCoord spaceAfter; + int paraFlags; /* Paragraph flags, bits as follows: */ + +#define PARA_KEEP 1 /* Do not break page within this paragraph */ +#define PARA_WITH_NEXT 2 /* Do not break page after this paragraph */ + +#define HT_JUSTIFY 0 /* For alignment */ +#define HT_LEFT 1 +#define HT_RIGHT 2 +#define HT_CENTER 3 + + } HTStyle; + +#define GetHTStyleName(p) ((p)->w_name ? (p)->w_name : (p)->c_name) +#define GetHTStyleSGML(p) ((p)->w_SGMLTag ? (p)->w_SGMLTag : (p)->c_SGMLTag) + +#define HTStyleInit( \ + next, name, SGML_tag, \ + font, fontsize, color, superscript, \ + anchor, indent1st, leftIndent, rightIndent, \ + alignment, lineHt, descentLine, \ + tabs, wordWrap, freeFormat, spaceBefore, spaceAfter, paraFlags) \ + { \ + next, NULL, #name, ST_##name, NULL, SGML_tag, \ + font, fontsize, color, superscript, \ + anchor, indent1st, leftIndent, rightIndent, \ + alignment, lineHt, descentLine, \ + tabs, wordWrap, freeFormat, spaceBefore, spaceAfter, paraFlags } + +#define HT_ALIGN_NONE (-1) + +/* Style functions: +*/ + extern HTStyle *HTStyleNew(void); + extern HTStyle *HTStyleNewNamed(const char *name); + extern HTStyle *HTStyleFree(HTStyle *self); + +#ifdef SUPRESS + extern HTStyle *HTStyleRead(HTStyle *self, HTStream *stream); + extern HTStyle *HTStyleWrite(HTStyle *self, HTStream *stream); +#endif +/* Style Sheet + * ----------- + */ + typedef struct _HTStyleSheet { + const char *name; + HTStyle *styles; + } HTStyleSheet; + +/* Stylesheet functions: +*/ + extern HTStyleSheet *HTStyleSheetNew(void); + extern HTStyleSheet *HTStyleSheetFree(HTStyleSheet *self); + extern HTStyle *HTStyleNamed(HTStyleSheet *self, const char *name); + extern HTStyle *HTStyleForParagraph(HTStyleSheet *self, HTParagraphStyle * paraStyle); + extern HTStyle *HTStyleMatching(HTStyleSheet *self, HTStyle *style); + +/* extern HTStyle * HTStyleForRun (HTStyleSheet *self, NXRun * run); */ + extern HTStyleSheet *HTStyleSheetAddStyle(HTStyleSheet *self, HTStyle *style); + extern HTStyleSheet *HTStyleSheetRemoveStyle(HTStyleSheet *self, HTStyle *style); + +#ifdef SUPPRESS + extern HTStyleSheet *HTStyleSheetRead(HTStyleSheet *self, HTStream *stream); + extern HTStyleSheet *HTStyleSheetWrite(HTStyleSheet *self, HTStream *stream); +#endif +#define CLEAR_POINTER ((void *)-1) /* Pointer value means "clear me" */ + +/* DefaultStyle.c */ + extern HTStyleSheet *DefaultStyle(HTStyle ***result_array); + +/* enum, use this instead of HTStyle name comparisons */ + enum HTStyle_Enum { + ST_Normal = 0, + ST_DivCenter, + ST_DivLeft, + ST_DivRight, + ST_Banner, + ST_Blockquote, + ST_Bq, + ST_Footnote, + ST_List, + ST_List1, + ST_List2, + ST_List3, + ST_List4, + ST_List5, + ST_List6, + ST_Menu, + ST_Menu1, + ST_Menu2, + ST_Menu3, + ST_Menu4, + ST_Menu5, + ST_Menu6, + ST_Glossary, + ST_Glossary1, + ST_Glossary2, + ST_Glossary3, + ST_Glossary4, + ST_Glossary5, + ST_Glossary6, + ST_GlossaryCompact, + ST_GlossaryCompact1, + ST_GlossaryCompact2, + ST_GlossaryCompact3, + ST_GlossaryCompact4, + ST_GlossaryCompact5, + ST_GlossaryCompact6, + ST_Example, + ST_Preformatted, + ST_Listing, + ST_Address, + ST_Note, + ST_Heading1, + ST_Heading2, + ST_Heading3, + ST_Heading4, + ST_Heading5, + ST_Heading6, + ST_HeadingCenter, + ST_HeadingLeft, + ST_HeadingRight + }; + +#ifdef __cplusplus +} +#endif +#endif /* HTStyle_H */ |