[librsvg/rustification] Make viewport_percentage() internal to rsvg-css.c

[Federico Mena Quintero <federico src gnome org>]

commit 66f7394503b4ed180d84735dd80382bc278abe41
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Nov 16 15:12:03 2016 -0600

    Make viewport_percentage() internal to rsvg-css.c
    
    This is only used in _rsvg_css_normalize_length() anyway.
    
    Also, remove an unused function.

 rsvg-css.c    |   16 ++++++++++++++--
 rsvg-styles.c |   18 ------------------
 rsvg-styles.h |    5 -----
 3 files changed, 14 insertions(+), 25 deletions(-)
---
diff --git a/rsvg-css.c b/rsvg-css.c
index a601fff..21d5027 100644
--- a/rsvg-css.c
+++ b/rsvg-css.c
@@ -122,6 +122,18 @@ rsvg_drawing_ctx_get_normalized_font_size (RsvgDrawingCtx *ctx)
     return normalize_font_size (rsvg_current_state (ctx), ctx);
 }
 
+static double
+viewport_percentage (double width, double height)
+{
+    /* https://www.w3.org/TR/SVG/coords.html#Units
+     *
+     * "For any other length value expressed as a percentage of the viewport, the
+     * percentage is calculated as the specified percentage of
+     * sqrt((actual-width)**2 + (actual-height)**2))/sqrt(2)."
+     */
+    return sqrt (width * width + height * height) / M_SQRT2;
+}
+
 double
 _rsvg_css_normalize_length (const RsvgLength * in, RsvgDrawingCtx * ctx)
 {
@@ -140,7 +152,7 @@ _rsvg_css_normalize_length (const RsvgLength * in, RsvgDrawingCtx * ctx)
             return in->length * h;
 
         case LENGTH_DIR_BOTH:
-            return in->length * rsvg_viewport_percentage (w, h);
+            return in->length * viewport_percentage (w, h);
         }
     } else if (in->unit == LENGTH_UNIT_FONT_EM || in->unit == LENGTH_UNIT_FONT_EX) {
         double font = rsvg_drawing_ctx_get_normalized_font_size (ctx);
@@ -161,7 +173,7 @@ _rsvg_css_normalize_length (const RsvgLength * in, RsvgDrawingCtx * ctx)
             return in->length * dpi_y;
 
         case LENGTH_DIR_BOTH:
-            return in->length * rsvg_viewport_percentage (dpi_x, dpi_y);
+            return in->length * viewport_percentage (dpi_x, dpi_y);
         }
     } else if (in->unit == LENGTH_UNIT_RELATIVE_LARGER) {
         /* todo: "larger" */
diff --git a/rsvg-styles.c b/rsvg-styles.c
index eea61dc..c5bdef4 100644
--- a/rsvg-styles.c
+++ b/rsvg-styles.c
@@ -96,24 +96,6 @@ style_value_data_free (StyleValueData *value)
     g_free (value);
 }
 
-gdouble
-rsvg_viewport_percentage (gdouble width, gdouble height)
-{
-    /* https://www.w3.org/TR/SVG/coords.html#Units
-     *
-     * "For any other length value expressed as a percentage of the viewport, the
-     * percentage is calculated as the specified percentage of
-     * sqrt((actual-width)**2 + (actual-height)**2))/sqrt(2)."
-     */
-    return sqrt (width * width + height * height) / M_SQRT2;
-}
-
-gdouble
-rsvg_dpi_percentage (RsvgHandle * ctx)
-{
-    return sqrt (ctx->priv->dpi_x * ctx->priv->dpi_y);
-}
-
 static void
 rsvg_state_init (RsvgState * state)
 {
diff --git a/rsvg-styles.h b/rsvg-styles.h
index bf64833..b4d5962 100644
--- a/rsvg-styles.h
+++ b/rsvg-styles.h
@@ -216,11 +216,6 @@ void rsvg_parse_style_attrs (RsvgHandle * ctx, RsvgState * state, const char *ta
                              const char *klazz, const char *id, RsvgPropertyBag * atts);
 
 G_GNUC_INTERNAL
-gdouble rsvg_viewport_percentage (gdouble width, gdouble height);
-G_GNUC_INTERNAL
-gdouble rsvg_dpi_percentage      (RsvgHandle * ctx);
-
-G_GNUC_INTERNAL
 gboolean rsvg_parse_transform   (cairo_matrix_t *matrix, const char *src);
 
 G_GNUC_INTERNAL