[evince/wip/gpoo/find-results-css] libview: Allow find results be styled with CSS

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 37dba7a54693bbda9332c772ddc117fb5e3c1154
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Fri Jul 3 23:29:53 2020 -0400

    libview: Allow find results be styled with CSS

 libview/ev-view.c | 39 +++++++++++++++------------------------
 shell/evince.css  |  8 ++++++++
 2 files changed, 23 insertions(+), 24 deletions(-)
---
diff --git a/libview/ev-view.c b/libview/ev-view.c
index 4b18b605..049074e6 100644
--- a/libview/ev-view.c
+++ b/libview/ev-view.c
@@ -113,6 +113,7 @@ typedef struct {
 
 #define EV_STYLE_CLASS_DOCUMENT_PAGE "document-page"
 #define EV_STYLE_CLASS_INVERTED      "inverted"
+#define EV_STYLE_CLASS_FIND_RESULTS  "find-results"
 
 #define ANNOT_POPUP_WINDOW_DEFAULT_WIDTH  200
 #define ANNOT_POPUP_WINDOW_DEFAULT_HEIGHT 150
@@ -7281,29 +7282,23 @@ static void
 draw_rubberband (EvView             *view,
                 cairo_t            *cr,
                 const GdkRectangle *rect,
-                gdouble             alpha)
+                gboolean            active)
 {
        GtkStyleContext *context;
-       GdkRGBA          color;
 
        context = gtk_widget_get_style_context (GTK_WIDGET (view));
        gtk_style_context_save (context);
-       gtk_style_context_get_background_color (context, GTK_STATE_FLAG_SELECTED, &color);
-       gtk_style_context_restore (context);
-        cairo_save (cr);
-
-       cairo_set_source_rgba (cr, color.red, color.green, color.blue, alpha);
-       cairo_rectangle (cr,
-                        rect->x - view->scroll_x,
-                        rect->y - view->scroll_y,
-                        rect->width, rect->height);
-       cairo_fill_preserve (cr);
-
-       cairo_set_line_width (cr, 0.5);
-       cairo_set_source_rgb (cr, color.red, color.green, color.blue);
-       cairo_stroke (cr);
+       gtk_style_context_add_class (context, EV_STYLE_CLASS_FIND_RESULTS);
+       if (active)
+               gtk_style_context_set_state (context, GTK_STATE_FLAG_ACTIVE);
+       else
+               gtk_style_context_set_state (context, GTK_STATE_FLAG_SELECTED);
 
-       cairo_restore (cr);
+       gtk_render_background (context, cr,
+                         rect->x - view->scroll_x,
+                         rect->y - view->scroll_y,
+                         rect->width, rect->height);
+       gtk_style_context_restore (context);
 }
 
 
@@ -7319,17 +7314,13 @@ highlight_find_results (EvView *view,
        for (i = 0; i < n_results; i++) {
                EvRectangle *rectangle;
                GdkRectangle view_rectangle;
-               gdouble      alpha;
+               gboolean     active;
 
-               if (i == view->find_result && page == view->find_page) {
-                       alpha = 0.6;
-               } else {
-                       alpha = 0.3;
-               }
+               active = i == view->find_result && page == view->find_page;
 
                rectangle = ev_view_find_get_result (view, page, i);
                _ev_view_transform_doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
-               draw_rubberband (view, cr, &view_rectangle, alpha);
+               draw_rubberband (view, cr, &view_rectangle, active);
         }
 }
 
diff --git a/shell/evince.css b/shell/evince.css
index 02501d26..2f55584a 100644
--- a/shell/evince.css
+++ b/shell/evince.css
@@ -24,6 +24,14 @@ evview:selected {
     background-color: @theme_selected_bg_color;
 }
 
+evview.find-results:selected {
+    background-color: alpha (@theme_selected_bg_color, 0.3);
+}
+
+evview.find-results:active {
+    background-color: alpha (@theme_selected_bg_color, 0.6);
+}
+
 evview.document-page {
     background-color: white;
     padding: 0;