From d68cc38af6ea48198710dc03d70c22654fd08563 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@cs.stanford.edu>
Date: Sun, 6 Dec 2020 19:25:07 -0800
Subject: [PATCH] work

---
 src/output/cairo.c | 63 ++++++----------------------------------------
 1 file changed, 8 insertions(+), 55 deletions(-)

diff --git a/src/output/cairo.c b/src/output/cairo.c
index 2556ab6fc1..52e38390ba 100644
--- a/src/output/cairo.c
+++ b/src/output/cairo.c
@@ -156,7 +156,6 @@ struct xr_driver
     int headings_height[2];
 
     /* Internal state. */
-    struct render_params *params;
     double font_scale;
     int char_width, char_height;
     cairo_t *cairo;
@@ -483,54 +482,7 @@ static void
 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
 {
   xr->cairo = cairo;
-
   cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
-
-  xr_measure_fonts (xr->cairo, xr->fonts, &xr->char_width, &xr->char_height);
-
-  for (int i = 0; i < XR_N_FONTS; i++)
-    {
-      struct xr_font *font = &xr->fonts[i];
-      font->layout = pango_cairo_create_layout (cairo);
-      pango_layout_set_font_description (font->layout, font->desc);
-    }
-
-  if (xr->params == NULL)
-    {
-      static const struct render_ops xr_render_ops = {
-        .draw_line = xr_draw_line,
-        .measure_cell_width = xr_measure_cell_width,
-        .measure_cell_height = xr_measure_cell_height,
-        .adjust_break = xr_adjust_break,
-        .draw_cell = xr_draw_cell,
-      };
-
-      xr->params = xmalloc (sizeof *xr->params);
-      xr->params->ops = &xr_render_ops;
-      xr->params->aux = xr;
-      xr->params->size[H] = xr->width;
-      xr->params->size[V] = xr->length;
-      xr->params->font_size[H] = xr->char_width;
-      xr->params->font_size[V] = xr->char_height;
-
-      enum { LW = XR_LINE_WIDTH, LS = XR_LINE_SPACE };
-      static const int xr_line_widths[RENDER_N_LINES] =
-        {
-          [RENDER_LINE_NONE] = 0,
-          [RENDER_LINE_SINGLE] = LW,
-          [RENDER_LINE_DASHED] = LW,
-          [RENDER_LINE_THICK] = LW * 2,
-          [RENDER_LINE_THIN] = LW / 2,
-          [RENDER_LINE_DOUBLE] = 2 * LW + LS,
-        };
-      xr->params->line_widths = xr_line_widths;
-
-      for (int i = 0; i < TABLE_N_AXES; i++)
-        xr->params->min_break[i] = xr->min_break[i];
-      xr->params->supports_margins = true;
-      xr->params->rtl = render_direction_rtl ();
-    }
-
   if (!xr->systemcolors)
     cairo_set_source_rgb (xr->cairo,
 			  xr->fg.r / 255.0, xr->fg.g / 255.0, xr->fg.b / 255.0);
@@ -625,7 +577,6 @@ xr_destroy (struct output_driver *driver)
         g_object_unref (font->layout);
     }
 
-  free (xr->params);
   free (xr);
 }
 
@@ -700,12 +651,15 @@ xr_submit (struct output_driver *driver, const struct output_item *output_item)
       xr_driver_next_page (xr, xr->cairo);
     }
 
-  xr_driver_output_item (xr, output_item);
-  while (xr_driver_need_new_page (xr))
+  struct xr_fsm *fsm = xr_fsm_create (output_item, driver->style, xr->cairo);
+  for (;;)
     {
-      cairo_restore (xr->cairo);
+      int used = xr_fsm_draw_slice (fsm, xr->cairo, xr->length - xr->y);
+      cairo_translate (xr->cairo, 0, used);
+      if (xr_fsm_is_empty (fsm))
+        break;
+
       cairo_show_page (xr->cairo);
-      cairo_save (xr->cairo);
       xr_driver_next_page (xr, xr->cairo);
     }
 }
@@ -745,8 +699,6 @@ xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
   xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
                           &xr->headings[1], xr->page_number, xr->width, true,
                           xr->length);
-
-  xr_driver_run_fsm (xr);
 }
 
 /* Start rendering OUTPUT_ITEM to XR.  Only valid if XR is not in the middle of
@@ -1578,6 +1530,7 @@ xr_driver_destroy (struct xr_driver *xr)
       output_driver_destroy (&xr->driver);
     }
 }
+
 static void
 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
                double x, double y, double width, double height)
-- 
2.30.2