First-stage support for Unicode combining characters. The `chars'

[u/mdw/putty] / terminal.h

diff --git a/terminal.h b/terminal.h
index 0050c0e..9bc1312 100644 (file)
--- a/terminal.h
+++ b/terminal.h
@@ -29,6 +29,42 @@ struct scrollregion {
 };
 #endif /* OPTIMISE_SCROLL */
 
+typedef struct termchar termchar;
+typedef struct termline termline;
+
+struct termchar {
+    /*
+     * Any code in terminal.c which definitely needs to be changed
+     * when extra fields are added here is labelled with a comment
+     * saying FULL-TERMCHAR.
+     */
+    unsigned long chr;
+    unsigned long attr;
+
+    /*
+     * The cc_next field is used to link multiple termchars
+     * together into a list, so as to fit more than one character
+     * into a character cell (Unicode combining characters).
+     * 
+     * cc_next is a relative offset into the current array of
+     * termchars. I.e. to advance to the next character in a list,
+     * one does `tc += tc->next'.
+     * 
+     * Zero means end of list.
+     */
+    int cc_next;
+};
+
+struct termline {
+    unsigned short lattr;
+    int cols;                         /* number of real columns on the line */
+    int size;                         /* number of allocated termchars
+                                       * (cc-lists may make this > cols) */
+    int temporary;                    /* TRUE if decompressed from scrollback */
+    int cc_free;                      /* offset to first cc in free list */
+    struct termchar *chars;
+};
+
 struct terminal_tag {
 
     int compatibility_level;
@@ -40,11 +76,9 @@ struct terminal_tag {
     int tempsblines;                  /* number of lines in temporary
                                          scrollback */
 
-    unsigned long *cpos;              /* cursor position (convenience) */
-
-    unsigned long *disptext;          /* buffer of text on real screen */
-    unsigned long *dispcurs;          /* location of cursor on real screen */
-    unsigned long curstype;           /* type of cursor on real screen */
+    termline **disptext;              /* buffer of text on real screen */
+    int dispcursx, dispcursy;         /* location of cursor on real screen */
+    int curstype;                     /* type of cursor on real screen */
 
 #define VBELL_TIMEOUT (TICKSPERSEC/10) /* visual bell lasts 1/10 sec */
 
@@ -53,18 +87,15 @@ struct terminal_tag {
     int beep_overloaded;
     long lastbeep;
 
-#define TTYPE unsigned long
+#define TTYPE termchar
 #define TSIZE (sizeof(TTYPE))
-#define fix_cpos do { \
-    term->cpos = lineptr(term->curs.y) + term->curs.x; \
-} while(0)
 
 #ifdef OPTIMISE_SCROLL
     struct scrollregion *scrollhead, *scrolltail;
 #endif /* OPTIMISE_SCROLL */
 
-    unsigned long curr_attr, save_attr;
-    unsigned long erase_char;
+    int default_attr, curr_attr, save_attr;
+    termchar basic_erase_char, erase_char;
 
     bufchain inbuf;                   /* terminal input buffer */
     pos curs;                         /* cursor */
@@ -112,7 +143,7 @@ struct terminal_tag {
     int xterm_mouse;                  /* send mouse messages to app */
     int mouse_is_down;                /* used while tracking mouse buttons */
 
-    unsigned long cset_attr[2];
+    int cset_attr[2];
 
 /*
  * Saved settings on the alternate screen.
@@ -173,7 +204,7 @@ struct terminal_tag {
     short wordness[256];
 
     /* Mask of attributes to pay attention to when painting. */
-    unsigned long attr_mask;
+    int attr_mask;
 
     wchar_t *paste_buffer;
     int paste_len, paste_pos, paste_hold;
@@ -208,6 +239,16 @@ struct terminal_tag {
      * through.
      */
     int in_term_out;
+
+    /*
+     * These are buffers used by the bidi and Arabic shaping code.
+     */
+    termchar *ltemp;
+    int ltemp_size;
+    bidi_char *wcFrom, *wcTo;
+    int wcFromTo_size;
+    termchar **pre_bidi_cache, **post_bidi_cache;
+    int bidi_cache_size;
 };
 
 #define in_utf(term) ((term)->utf || (term)->ucsdata->line_codepage==CP_UTF8)