output: Make table dimension functions work in arbitrary contexts.

[pspp-builds.git] / src / output / table.h

diff --git a/src/output/table.h b/src/output/table.h
index 567745d4fdfefe089fc4589dc1a85acf5dbb76f2..516db6a52a7f44e5fe9e6a853aaf1fb63294587b 100644 (file)
--- a/src/output/table.h
+++ b/src/output/table.h
@@ -67,8 +67,10 @@ struct tab_joined_cell
 
 struct outp_driver;
 struct tab_table;
-typedef void tab_dim_func (struct tab_table *, struct outp_driver *,
-                           void *aux);
+struct tab_rendering;
+
+typedef void tab_dim_func (struct tab_rendering *, void *aux);
+typedef void tab_dim_free_func (void *aux);
 
 /* A table. */
 struct tab_table
@@ -87,16 +89,12 @@ struct tab_table
     unsigned char *ct;         /* Cell types; unsigned char[nr][nc]. */
     unsigned char *rh;         /* Horiz rules; unsigned char[nr+1][nc]. */
     unsigned char *rv;         /* Vert rules; unsigned char[nr][nc+1]. */
+
+    /* Calculating row and column dimensions. */
     tab_dim_func *dim;         /* Calculates cell widths and heights. */
+    tab_dim_free_func *dim_free; /* Frees space allocated for dim function. */
     void *dim_aux;              /* Auxiliary data for dim function. */
 
-    /* Calculated during output. */
-    int *w;                    /* Column widths; [nc]. */
-    int *h;                    /* Row heights; [nr]. */
-    int *hrh;                  /* Heights of horizontal rules; [nr+1]. */
-    int *wrv;                  /* Widths of vertical rules; [nc+1]. */
-    int wl, wr, ht, hb;                /* Width/height of header rows/columns. */
-
     /* Editing info. */
     int col_ofs, row_ofs;      /* X and Y offsets. */
   };
@@ -111,6 +109,23 @@ static inline int tab_r (const struct tab_table *table) { return table->r; }
 static inline int tab_t (const struct tab_table *table) { return table->t; }
 static inline int tab_b (const struct tab_table *table) { return table->b; }
 
+struct tab_rendering
+  {
+    const struct tab_table *table;
+    struct outp_driver *driver;
+
+    int *w;                    /* Column widths; [nc]. */
+    int *h;                    /* Row heights; [nr]. */
+    int *hrh;                  /* Heights of horizontal rules; [nr+1]. */
+    int *wrv;                  /* Widths of vertical rules; [nc+1]. */
+
+    /* These fields would be redundant with those in struct tab_table, except
+       that a table will be rendered with fewer header rows or columns than
+       requested when we are pressed for space. */
+    int l, r, t, b;            /* Number of header rows/columns. */
+    int wl, wr, ht, hb;                /* Width/height of header rows/columns. */
+  };
+
 /* Tables. */
 struct tab_table *tab_create (int nc, int nr, int reallocable);
 void tab_destroy (struct tab_table *);
@@ -125,9 +140,10 @@ void tab_submit (struct tab_table *);
 
 /* Dimensioning. */
 tab_dim_func tab_natural_dimensions;
-int tab_natural_width (struct tab_table *t, struct outp_driver *d, int c);
-int tab_natural_height (struct tab_table *t, struct outp_driver *d, int r);
-void tab_dim (struct tab_table *, tab_dim_func *, void *aux);
+int tab_natural_width (const struct tab_rendering *, int c);
+int tab_natural_height (const struct tab_rendering *, int r);
+void tab_dim (struct tab_table *,
+              tab_dim_func *, tab_dim_free_func *, void *aux);
 
 /* Rules. */
 void tab_hline (struct tab_table *, int style, int x1, int x2, int y);