[gtk+] window: Add individual CSS classes based on edge constraints

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit b1c4e9afef5144b3c55a7be22b01c38cdf0088a7
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Aug 18 20:12:23 2017 -0300

    window: Add individual CSS classes based on edge constraints
    
    The last touch on this patch series is making GtkWindow able to
    selectively adjust various UI details based on the different
    tiled edges. The main driver here is that we don't want to show
    shadows on edges that are constrained.
    
    This patch adds the necessary code to do that, while still
    maintaining compatibility with the old ways.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783669

 gtk/gtkwindow.c                          |   41 +++++++++++++++++++++++++++---
 gtk/theme/Adwaita/_common.scss           |   16 ++++++++++-
 gtk/theme/Adwaita/gtk-contained-dark.css |    6 ++--
 gtk/theme/Adwaita/gtk-contained.css      |    6 ++--
 4 files changed, 57 insertions(+), 12 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index d2af718..139a5b3 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -6919,13 +6919,40 @@ update_window_style_classes (GtkWindow *window)
 {
   GtkWindowPrivate *priv = window->priv;
   GtkStyleContext *context;
+  guint edge_constraints;
 
   context = gtk_widget_get_style_context (GTK_WIDGET (window));
+  edge_constraints = priv->edge_constraints;
 
-  if (priv->tiled)
-    gtk_style_context_add_class (context, "tiled");
+  if (!priv->edge_constraints)
+    {
+      if (priv->tiled)
+        gtk_style_context_add_class (context, "tiled");
+      else
+        gtk_style_context_remove_class (context, "tiled");
+    }
   else
-    gtk_style_context_remove_class (context, "tiled");
+    {
+      if (edge_constraints & GDK_WINDOW_STATE_TOP_TILED)
+        gtk_style_context_add_class (context, "tiled-top");
+      else
+        gtk_style_context_remove_class (context, "tiled-top");
+
+      if (edge_constraints & GDK_WINDOW_STATE_RIGHT_TILED)
+        gtk_style_context_add_class (context, "tiled-right");
+      else
+        gtk_style_context_remove_class (context, "tiled-right");
+
+      if (edge_constraints & GDK_WINDOW_STATE_BOTTOM_TILED)
+        gtk_style_context_add_class (context, "tiled-bottom");
+      else
+        gtk_style_context_remove_class (context, "tiled-bottom");
+
+      if (edge_constraints & GDK_WINDOW_STATE_LEFT_TILED)
+        gtk_style_context_add_class (context, "tiled-left");
+      else
+        gtk_style_context_remove_class (context, "tiled-left");
+    }
 
   if (priv->maximized)
     gtk_style_context_add_class (context, "maximized");
@@ -7191,7 +7218,13 @@ gtk_window_state_event (GtkWidget           *widget,
 
   update_edge_constraints (window, event);
 
-  if (event->changed_mask & (GDK_WINDOW_STATE_FULLSCREEN | GDK_WINDOW_STATE_MAXIMIZED | 
GDK_WINDOW_STATE_TILED))
+  if (event->changed_mask & (GDK_WINDOW_STATE_FULLSCREEN |
+                             GDK_WINDOW_STATE_MAXIMIZED |
+                             GDK_WINDOW_STATE_TILED |
+                             GDK_WINDOW_STATE_TOP_TILED |
+                             GDK_WINDOW_STATE_RIGHT_TILED |
+                             GDK_WINDOW_STATE_BOTTOM_TILED |
+                             GDK_WINDOW_STATE_LEFT_TILED))
     {
       update_window_style_classes (window);
       update_window_buttons (window);
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 4901c1f..3cf7274 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -1557,6 +1557,10 @@ headerbar {
 
   // squared corners when the window is maximized, tiled, or fullscreen
   .tiled &,
+  .tiled-top &,
+  .tiled-left &,
+  .tiled-right &,
+  .tiled-bottom &,
   .maximized &,
   .fullscreen & {
     &:backdrop, & {
@@ -1604,7 +1608,11 @@ headerbar {
   }
 }
 
-.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar {
+.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar,
+.background:not(.tiled-top):not(.maximized):not(.solid-csd) .titlebar,
+.background:not(.tiled-left):not(.maximized):not(.solid-csd) .titlebar,
+.background:not(.tiled-right):not(.maximized):not(.solid-csd) .titlebar,
+.background:not(.tiled-bottom):not(.maximized):not(.solid-csd) .titlebar {
   &:backdrop, & {
     border-top-left-radius: 7px;
     border-top-right-radius: 7px;
@@ -4236,7 +4244,11 @@ decoration {
 
   .maximized &,
   .fullscreen &,
-  .tiled & { border-radius: 0; }
+  .tiled &,
+  .tiled-top &,
+  .tiled-left &,
+  .tiled-right &,
+  .tiled-bottom & { border-radius: 0; }
 
   .popup & { box-shadow: none; }
 
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index 70db241..d7010c8 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -650,7 +650,7 @@ searchbar, .location-bar { border-width: 0 0 1px; padding: 3px; }
 
 .selection-mode.titlebar:not(headerbar) .selection-menu:backdrop .arrow, 
.selection-mode.titlebar:not(headerbar) .selection-menu .arrow, headerbar.selection-mode 
.selection-menu:backdrop .arrow, headerbar.selection-mode .selection-menu .arrow { -gtk-icon-source: 
-gtk-icontheme("pan-down-symbolic"); color: rgba(255, 255, 255, 0.5); -gtk-icon-shadow: none; }
 
-.tiled .titlebar:backdrop:not(headerbar), .tiled .titlebar:not(headerbar), .maximized 
.titlebar:backdrop:not(headerbar), .maximized .titlebar:not(headerbar), .fullscreen 
.titlebar:backdrop:not(headerbar), .fullscreen .titlebar:not(headerbar), .tiled headerbar:backdrop, .tiled 
headerbar, .maximized headerbar:backdrop, .maximized headerbar, .fullscreen headerbar:backdrop, .fullscreen 
headerbar { border-radius: 0; }
+.tiled .titlebar:backdrop:not(headerbar), .tiled .titlebar:not(headerbar), .tiled-top 
.titlebar:backdrop:not(headerbar), .tiled-top .titlebar:not(headerbar), .tiled-left 
.titlebar:backdrop:not(headerbar), .tiled-left .titlebar:not(headerbar), .tiled-right 
.titlebar:backdrop:not(headerbar), .tiled-right .titlebar:not(headerbar), .tiled-bottom 
.titlebar:backdrop:not(headerbar), .tiled-bottom .titlebar:not(headerbar), .maximized 
.titlebar:backdrop:not(headerbar), .maximized .titlebar:not(headerbar), .fullscreen 
.titlebar:backdrop:not(headerbar), .fullscreen .titlebar:not(headerbar), .tiled headerbar:backdrop, .tiled 
headerbar, .tiled-top headerbar:backdrop, .tiled-top headerbar, .tiled-left headerbar:backdrop, .tiled-left 
headerbar, .tiled-right headerbar:backdrop, .tiled-right headerbar, .tiled-bottom headerbar:backdrop, 
.tiled-bottom headerbar, .maximized headerbar:backdrop, .maximized headerbar, .fullscreen headerbar:backdrop, 
.fullscreen headerbar { border-radius: 0; }
 
 .default-decoration.titlebar:not(headerbar), headerbar.default-decoration { min-height: 28px; padding: 4px; }
 
@@ -662,7 +662,7 @@ headerbar entry, headerbar spinbutton, headerbar separator, headerbar button { m
 
 headerbar switch { margin-top: 9px; margin-bottom: 9px; }
 
-.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar { border-top-left-radius: 7px; 
border-top-right-radius: 7px; }
+.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-top):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-top):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-left):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-left):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-right):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-right):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-bottom):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-bottom):not(.maximized):not(.solid-csd) .titlebar { border-top-left-radius: 7px; 
border-top-right-radius: 7px; }
 
 window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) separator:first-child + 
headerbar:backdrop, window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) separator:first-child 
+ headerbar, window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) 
headerbar:first-child:backdrop, window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) 
headerbar:first-child { border-top-left-radius: 7px; }
 
@@ -1828,7 +1828,7 @@ decoration { border-radius: 7px 7px 0 0; border-width: 0px; box-shadow: 0 3px 9p
 
 decoration:backdrop { box-shadow: 0 3px 9px 1px transparent, 0 2px 6px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px 
rgba(27, 31, 32, 0.9); transition: 200ms ease-out; }
 
-.maximized decoration, .fullscreen decoration, .tiled decoration { border-radius: 0; }
+.maximized decoration, .fullscreen decoration, .tiled decoration, .tiled-top decoration, .tiled-left 
decoration, .tiled-right decoration, .tiled-bottom decoration { border-radius: 0; }
 
 .popup decoration { box-shadow: none; }
 
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 1bed44a..a5f18f3 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -658,7 +658,7 @@ searchbar, .location-bar { border-width: 0 0 1px; padding: 3px; }
 
 .selection-mode.titlebar:not(headerbar) .selection-menu:backdrop .arrow, 
.selection-mode.titlebar:not(headerbar) .selection-menu .arrow, headerbar.selection-mode 
.selection-menu:backdrop .arrow, headerbar.selection-mode .selection-menu .arrow { -gtk-icon-source: 
-gtk-icontheme("pan-down-symbolic"); color: rgba(255, 255, 255, 0.5); -gtk-icon-shadow: none; }
 
-.tiled .titlebar:backdrop:not(headerbar), .tiled .titlebar:not(headerbar), .maximized 
.titlebar:backdrop:not(headerbar), .maximized .titlebar:not(headerbar), .fullscreen 
.titlebar:backdrop:not(headerbar), .fullscreen .titlebar:not(headerbar), .tiled headerbar:backdrop, .tiled 
headerbar, .maximized headerbar:backdrop, .maximized headerbar, .fullscreen headerbar:backdrop, .fullscreen 
headerbar { border-radius: 0; }
+.tiled .titlebar:backdrop:not(headerbar), .tiled .titlebar:not(headerbar), .tiled-top 
.titlebar:backdrop:not(headerbar), .tiled-top .titlebar:not(headerbar), .tiled-left 
.titlebar:backdrop:not(headerbar), .tiled-left .titlebar:not(headerbar), .tiled-right 
.titlebar:backdrop:not(headerbar), .tiled-right .titlebar:not(headerbar), .tiled-bottom 
.titlebar:backdrop:not(headerbar), .tiled-bottom .titlebar:not(headerbar), .maximized 
.titlebar:backdrop:not(headerbar), .maximized .titlebar:not(headerbar), .fullscreen 
.titlebar:backdrop:not(headerbar), .fullscreen .titlebar:not(headerbar), .tiled headerbar:backdrop, .tiled 
headerbar, .tiled-top headerbar:backdrop, .tiled-top headerbar, .tiled-left headerbar:backdrop, .tiled-left 
headerbar, .tiled-right headerbar:backdrop, .tiled-right headerbar, .tiled-bottom headerbar:backdrop, 
.tiled-bottom headerbar, .maximized headerbar:backdrop, .maximized headerbar, .fullscreen headerbar:backdrop, 
.fullscreen headerbar { border-radius: 0; }
 
 .default-decoration.titlebar:not(headerbar), headerbar.default-decoration { min-height: 28px; padding: 4px; }
 
@@ -670,7 +670,7 @@ headerbar entry, headerbar spinbutton, headerbar separator, headerbar button { m
 
 headerbar switch { margin-top: 9px; margin-bottom: 9px; }
 
-.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar { border-top-left-radius: 7px; 
border-top-right-radius: 7px; }
+.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-top):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-top):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-left):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-left):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-right):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-right):not(.maximized):not(.solid-csd) .titlebar, 
.background:not(.tiled-bottom):not(.maximized):not(.solid-csd) .titlebar:backdrop, 
.background:not(.tiled-bottom):not(.maximized):not(.solid-csd) .titlebar { border-top-left-radius: 7px; 
border-top-right-radius: 7px; }
 
 window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) separator:first-child + 
headerbar:backdrop, window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) separator:first-child 
+ headerbar, window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) 
headerbar:first-child:backdrop, window:not(.tiled):not(.maximized):not(.fullscreen):not(.solid-csd) 
headerbar:first-child { border-top-left-radius: 7px; }
 
@@ -1848,7 +1848,7 @@ decoration { border-radius: 7px 7px 0 0; border-width: 0px; box-shadow: 0 3px 9p
 
 decoration:backdrop { box-shadow: 0 3px 9px 1px transparent, 0 2px 6px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px 
rgba(0, 0, 0, 0.18); transition: 200ms ease-out; }
 
-.maximized decoration, .fullscreen decoration, .tiled decoration { border-radius: 0; }
+.maximized decoration, .fullscreen decoration, .tiled decoration, .tiled-top decoration, .tiled-left 
decoration, .tiled-right decoration, .tiled-bottom decoration { border-radius: 0; }
 
 .popup decoration { box-shadow: none; }