Merged fringe width related changes from xterm.c.

1 files changed, 198 insertions, 98 deletions

diff --git a/src/w32term.c b/src/w32term.c
index 9c0b0392424..af09b7b8554 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -84,9 +84,17 @@ enum fringe_bitmap_type
    `indicate-empty-lines' is non-nil.  */
 
 #define zv_width 8
-#define zv_height 8
-static unsigned short zv_bits[] = {
-   0x00, 0x00, 0x78, 0x78, 0x78, 0x78, 0x00, 0x00};
+#define zv_height 72
+#define zv_period 3
+static unsigned char zv_bits[] = {
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x3c, 0x00};
 static HBITMAP zv_bmp;
 
 /* An arrow like this: `<-'.  */
@@ -400,7 +408,7 @@ static void x_erase_phys_cursor P_ ((struct window *));
 void x_display_cursor P_ ((struct window *w, int, int, int, int, int));
 void x_display_and_set_cursor P_ ((struct window *, int, int, int, int, int));
 static void w32_draw_fringe_bitmap P_ ((struct window *, HDC hdc, struct glyph_row *, 
-                                        enum fringe_bitmap_type));
+                                        enum fringe_bitmap_type, int left_p));
 static void w32_clip_to_row P_ ((struct window *, struct glyph_row *,
                                  HDC, int));
 static int x_phys_cursor_in_rect_p P_ ((struct window *, RECT *));
@@ -810,16 +818,18 @@ x_after_update_window_line (desired_row)
    drawn.  */
 
 static void
-w32_draw_fringe_bitmap (w, hdc, row, which)
+w32_draw_fringe_bitmap (w, hdc, row, which, left_p)
      struct window *w;
      HDC hdc;
      struct glyph_row *row;
      enum fringe_bitmap_type which;
+     int left_p;
 {
   struct frame *f = XFRAME (WINDOW_FRAME (w));
   Window window = FRAME_W32_WINDOW (f);
   HDC compat_hdc;
   int x, y, wd, h, dy;
+  int b1, b2;
   HBITMAP pixmap;
   HANDLE horig_obj;
   struct face *face;
@@ -827,71 +837,118 @@ w32_draw_fringe_bitmap (w, hdc, row, which)
   /* Must clip because of partially visible lines.  */
   w32_clip_to_row (w, row, hdc, 1);
 
+  /* Convert row to frame coordinates.  */
+  y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y);
+
   switch (which)
     {
+    case NO_FRINGE_BITMAP:
+      wd = 0;
+      h = 0;
+      break;
+
     case LEFT_TRUNCATION_BITMAP:
       wd = left_width;
       h = left_height;
       pixmap = left_bmp;
-      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
-           - wd
-           - (FRAME_X_LEFT_FRINGE_WIDTH (f) - wd) / 2);
       break;
       
     case OVERLAY_ARROW_BITMAP:
       wd = ov_width;
       h = ov_height;
       pixmap = ov_bmp;
-      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
-           - wd
-           - (FRAME_X_LEFT_FRINGE_WIDTH (f) - wd) / 2);
       break;
       
     case RIGHT_TRUNCATION_BITMAP:
       wd = right_width;
       h = right_height;
       pixmap = right_bmp;
-      x = window_box_right (w, -1);
-      x += (FRAME_X_RIGHT_FRINGE_WIDTH (f) - wd) / 2;
       break;
 
     case CONTINUED_LINE_BITMAP:
       wd = continued_width;
       h = continued_height;
       pixmap = continued_bmp;
-      x = window_box_right (w, -1);
-      x += (FRAME_X_RIGHT_FRINGE_WIDTH (f) - wd) / 2;
       break;
       
     case CONTINUATION_LINE_BITMAP:
       wd = continuation_width;
       h = continuation_height;
       pixmap = continuation_bmp;
-      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
-           - wd
-           - (FRAME_X_LEFT_FRINGE_WIDTH (f) - wd) / 2);
       break;
 
     case ZV_LINE_BITMAP:
       wd = zv_width;
-      h = zv_height;
+      h = zv_height - (y % zv_period);
       pixmap = zv_bmp;
-      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
-           - wd
-           - (FRAME_X_LEFT_FRINGE_WIDTH (f) - wd) / 2);
       break;
 
     default:
       abort ();
     }
 
-  /* Convert to frame coordinates.  Set dy to the offset in the row to
-     start drawing the bitmap.  */
-  y = WINDOW_TO_FRAME_PIXEL_Y (w, row->y);
+  /* Clip bitmap if too high.  */
+  if (h > row->height)
+    h = row->height;
+
+  /* Set dy to the offset in the row to start drawing the bitmap.  */
   dy = (row->height - h) / 2;
 
   /* Draw the bitmap.  */
   face = FACE_FROM_ID (f, FRINGE_FACE_ID);
+  PREPARE_FACE_FOR_DISPLAY (f, face);
+
+  /* Clear left fringe if no bitmap to draw or if bitmap doesn't fill
+     the fringe.  */
+  b1 = -1;
+  if (left_p)
+    {
+      if (wd > FRAME_X_LEFT_FRINGE_WIDTH (f))
+        wd = FRAME_X_LEFT_FRINGE_WIDTH (f);
+      x = (WINDOW_TO_FRAME_PIXEL_X (w, 0)
+           - wd
+           - (FRAME_X_LEFT_FRINGE_WIDTH (f) - wd) / 2);
+      if (wd < FRAME_X_LEFT_FRINGE_WIDTH (f) || row->height > h)
+        {
+          /* If W has a vertical border to its left, don't draw over it.  */
+          int border = ((XFASTINT (w->left) > 0
+                         && !FRAME_HAS_VERTICAL_SCROLL_BARS (f))
+                        ? 1 : 0);
+          b1 = (window_box_left (w, -1)
+                - FRAME_X_LEFT_FRINGE_WIDTH (f)
+                + border);
+          b2 = (FRAME_X_LEFT_FRINGE_WIDTH (f) - border);
+        }
+    }
+  else
+    {
+      if (wd > FRAME_X_RIGHT_FRINGE_WIDTH (f))
+        wd = FRAME_X_RIGHT_FRINGE_WIDTH (f);
+      x = (window_box_right (w, -1)
+           + (FRAME_X_RIGHT_FRINGE_WIDTH (f) - wd) / 2);
+      /* Clear right fringe if no bitmap to draw of if bitmap doesn't fill
+         the fringe.  */
+      if (wd < FRAME_X_RIGHT_FRINGE_WIDTH (f) || row->height > h)
+        {
+          b1 = window_box_right (w, -1);
+          b2 = FRAME_X_RIGHT_FRINGE_WIDTH (f);
+        }
+    }
+
+  if (b1 >= 0)
+    {
+      int header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w);
+      
+      w32_fill_area (f, hdc, face->background,
+                     b1,
+                     WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
+                                                      row->y)),
+                     b2,
+                     row->visible_height);
+    }
+
+  if (which == NO_FRINGE_BITMAP)
+    return;
 
   compat_hdc = CreateCompatibleDC (hdc);
   SaveDC (hdc);
@@ -900,7 +957,9 @@ w32_draw_fringe_bitmap (w, hdc, row, which)
   SetTextColor (hdc, face->background);
   SetBkColor (hdc, face->foreground);
 
-  BitBlt (hdc, x, y + dy, wd, h, compat_hdc, 0, 0, SRCCOPY);
+  BitBlt (hdc, x, y + dy, wd, h, compat_hdc, 0,
+          (which == ZV_LINE_BITMAP ? (row->y % zv_period) : 0),
+          SRCCOPY);
 
   SelectObject (compat_hdc, horig_obj);
   DeleteDC (compat_hdc);
@@ -918,8 +977,6 @@ x_draw_row_fringe_bitmaps (w, row)
 {
   struct frame *f = XFRAME (w->frame);
   enum fringe_bitmap_type bitmap;
-  struct face *face;
-  int header_line_height = -1;
   HDC hdc;
 
   xassert (interrupt_input_blocked);
@@ -929,81 +986,40 @@ x_draw_row_fringe_bitmaps (w, row)
   if (row->visible_height <= 0)
     return;
 
-  face = FACE_FROM_ID (f, FRINGE_FACE_ID);
-  PREPARE_FACE_FOR_DISPLAY (f, face);
-
-  /* Decide which bitmap to draw in the left fringe.  */
-  if (row->overlay_arrow_p)
-    bitmap = OVERLAY_ARROW_BITMAP;
-  else if (row->truncated_on_left_p)
-    bitmap = LEFT_TRUNCATION_BITMAP;
-  else if (MATRIX_ROW_CONTINUATION_LINE_P (row))
-    bitmap = CONTINUATION_LINE_BITMAP;
-  else if (row->indicate_empty_line_p)
-    bitmap = ZV_LINE_BITMAP;
-  else
-    bitmap = NO_FRINGE_BITMAP;
-
   hdc = get_frame_dc (f);
 
-  /* Clear left fringe if no bitmap to draw or if bitmap doesn't fill
-     the fringe.  */
-  if (bitmap == NO_FRINGE_BITMAP
-      || FRAME_FRINGE_BITMAP_WIDTH (f) < FRAME_X_LEFT_FRINGE_WIDTH (f)
-      || row->height > FRAME_FRINGE_BITMAP_HEIGHT (f))
-    {
-      /* If W has a vertical border to its left, don't draw over it.  */
-      int border = ((XFASTINT (w->left) > 0
-                     && !FRAME_HAS_VERTICAL_SCROLL_BARS (f))
-                    ? 1 : 0);
-      int left = window_box_left (w, -1);
-
-      if (header_line_height < 0)
-        header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w);
-      
-      w32_fill_area (f, hdc, face->background,
-                     left - FRAME_X_LEFT_FRINGE_WIDTH (f) + border,
-                     WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
-                                                      row->y)),
-                     FRAME_X_LEFT_FRINGE_WIDTH (f) - border,
-                     row->visible_height);
-    }
-
-  /* Draw the left bitmap.  */
-  if (bitmap != NO_FRINGE_BITMAP)
-    w32_draw_fringe_bitmap (w, hdc, row, bitmap);
+  if (FRAME_X_LEFT_FRINGE_WIDTH (f) != 0)
+    {
+      /* Decide which bitmap to draw in the left fringe.  */
+      if (row->overlay_arrow_p)
+        bitmap = OVERLAY_ARROW_BITMAP;
+      else if (row->truncated_on_left_p)
+        bitmap = LEFT_TRUNCATION_BITMAP;
+      else if (MATRIX_ROW_CONTINUATION_LINE_P (row))
+        bitmap = CONTINUATION_LINE_BITMAP;
+      else if (row->indicate_empty_line_p)
+        bitmap = ZV_LINE_BITMAP;
+      else
+        bitmap = NO_FRINGE_BITMAP;
 
-  /* Decide which bitmap to draw in the right fringe.  */
-  if (row->truncated_on_right_p)
-    bitmap = RIGHT_TRUNCATION_BITMAP;
-  else if (row->continued_p)
-    bitmap = CONTINUED_LINE_BITMAP;
-  else
-    bitmap = NO_FRINGE_BITMAP;
+      w32_draw_fringe_bitmap (w, hdc, row, bitmap, 1);
+    }
 
-  /* Clear right fringe if no bitmap to draw of if bitmap doesn't fill
-     the fringe.  */
-  if (bitmap == NO_FRINGE_BITMAP
-      || FRAME_FRINGE_BITMAP_WIDTH (f) < FRAME_X_RIGHT_FRINGE_WIDTH (f)
-      || row->height > FRAME_FRINGE_BITMAP_HEIGHT (f))
+  if (FRAME_X_RIGHT_FRINGE_WIDTH (f) != 0)
     {
-      int right = window_box_right (w, -1);
-
-      if (header_line_height < 0)
-        header_line_height = WINDOW_DISPLAY_HEADER_LINE_HEIGHT (w);
+      /* Decide which bitmap to draw in the right fringe.  */
+      if (row->truncated_on_right_p)
+        bitmap = RIGHT_TRUNCATION_BITMAP;
+      else if (row->continued_p)
+        bitmap = CONTINUED_LINE_BITMAP;
+      else if (row->indicate_empty_line_p && FRAME_X_LEFT_FRINGE_WIDTH (f) == 0)
+        bitmap = ZV_LINE_BITMAP;
+      else
+        bitmap = NO_FRINGE_BITMAP;
 
-      w32_fill_area (f, hdc, face->background,
-                     right,
-                     WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
-                                                      row->y)),
-                     FRAME_X_RIGHT_FRINGE_WIDTH (f),
-                     row->visible_height);
+      w32_draw_fringe_bitmap (w, hdc, row, bitmap, 0);
     }
 
-  /* Draw the right bitmap.  */
-  if (bitmap != NO_FRINGE_BITMAP)
-    w32_draw_fringe_bitmap (w, hdc, row, bitmap);
-
   release_frame_dc (f, hdc);
 }
 
@@ -4898,7 +4914,6 @@ x_draw_glyphs (w, x, row, area, start, end, hl, overlaps_p)
       /* X is relative to the left edge of W, without scroll bars
          or fringes.  */
       struct frame *f = XFRAME (WINDOW_FRAME (w));
-      /* int width = FRAME_FRINGE_WIDTH (f); */
       int window_left_x = WINDOW_LEFT_MARGIN (w) * CANON_X_UNIT (f);
 
       x += window_left_x;
@@ -9887,6 +9902,90 @@ x_new_fontset (f, fontsetname)
   return build_string (fontsetname);
 }
 
+/* Compute actual fringe widths */
+
+void
+x_compute_fringe_widths (f, redraw)
+     struct frame *f;
+     int redraw;
+{
+  int o_left = f->output_data.w32->left_fringe_width;
+  int o_right = f->output_data.w32->right_fringe_width;
+  int o_cols = f->output_data.w32->fringe_cols;
+
+  Lisp_Object left_fringe = Fassq (Qleft_fringe, f->param_alist);
+  Lisp_Object right_fringe = Fassq (Qright_fringe, f->param_alist);
+  int left_fringe_width, right_fringe_width;
+
+  if (!NILP (left_fringe))
+    left_fringe = Fcdr (left_fringe);
+  if (!NILP (right_fringe))
+    right_fringe = Fcdr (right_fringe);
+
+  left_fringe_width = ((NILP (left_fringe) || !INTEGERP (left_fringe)) ? 8 :
+                       XINT (left_fringe));
+  right_fringe_width = ((NILP (right_fringe) || !INTEGERP (right_fringe)) ? 8 :
+                        XINT (right_fringe));
+
+  if (left_fringe_width || right_fringe_width)
+    {
+      int left_wid = left_fringe_width >= 0 ? left_fringe_width : -left_fringe_width;
+      int right_wid = right_fringe_width >= 0 ? right_fringe_width : -right_fringe_width;
+      int conf_wid = left_wid + right_wid;
+      int font_wid = FONT_WIDTH (f->output_data.w32->font);
+      int cols = (left_wid + right_wid + font_wid-1) / font_wid;
+      int real_wid = cols * font_wid;
+      if (left_wid && right_wid)
+        {
+          if (left_fringe_width < 0)
+            {
+              /* Left fringe width is fixed, adjust right fringe if necessary */
+              f->output_data.w32->left_fringe_width = left_wid;
+              f->output_data.w32->right_fringe_width = real_wid - left_wid;
+            }
+          else if (right_fringe_width < 0)
+            {
+              /* Right fringe width is fixed, adjust left fringe if necessary */
+              f->output_data.w32->left_fringe_width = real_wid - right_wid;
+              f->output_data.w32->right_fringe_width = right_wid;
+            }
+          else
+            {
+              /* Adjust both fringes with an equal amount.
+                 Note that we are doing integer arithmetic here, so don't
+                 lose a pixel if the total width is an odd number.  */
+              int fill = real_wid - conf_wid;
+              f->output_data.w32->left_fringe_width = left_wid + fill/2;
+              f->output_data.w32->right_fringe_width = right_wid + fill - fill/2;
+            }
+        }
+      else if (left_fringe_width)
+        {
+          f->output_data.w32->left_fringe_width = real_wid;
+          f->output_data.w32->right_fringe_width = 0;
+        }
+      else
+        {
+          f->output_data.w32->left_fringe_width = 0;
+          f->output_data.w32->right_fringe_width = real_wid;
+        }
+      f->output_data.w32->fringe_cols = cols;
+      f->output_data.w32->fringes_extra = real_wid;
+    }
+  else
+    {
+      f->output_data.w32->left_fringe_width = 0;
+      f->output_data.w32->right_fringe_width = 0;
+      f->output_data.w32->fringe_cols = 0;
+      f->output_data.w32->fringes_extra = 0;
+    }
+
+  if (redraw && FRAME_VISIBLE_P (f))
+    if (o_left != f->output_data.w32->left_fringe_width ||
+        o_right != f->output_data.w32->right_fringe_width ||
+        o_cols != f->output_data.w32->fringe_cols)
+      redraw_frame (f);
+}
 
 /***********************************************************************
         TODO: W32 Input Methods
@@ -10020,8 +10119,9 @@ x_set_window_size (f, change_gravity, cols, rows)
     = (!FRAME_HAS_VERTICAL_SCROLL_BARS (f)
        ? 0
        : (FRAME_SCROLL_BAR_COLS (f) * FONT_WIDTH (f->output_data.w32->font)));
-  f->output_data.w32->fringes_extra
-    = FRAME_FRINGE_WIDTH (f);
+
+  x_compute_fringe_widths (f, 0);
+
   pixelwidth = CHAR_TO_PIXEL_WIDTH (f, cols);
   pixelheight = CHAR_TO_PIXEL_HEIGHT (f, rows);