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Add a function to dump CSS nodes and styles
Add a gtk_style_context_to_string function that can serialize a CSS node or tree of nodes, optionally including CSS properties as well. This will be useful in writing tests.
This commit is contained in:
Matthias Clasen
parent
a6624d803e
commit
68edc47f6a
@ -6244,6 +6244,8 @@ gtk_style_context_set_frame_clock
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gtk_style_context_set_state
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gtk_style_context_set_scale
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gtk_style_context_get_scale
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GtkStyleContextPrintFlags
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gtk_style_context_to_string
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<SUBSECTION>
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GtkBorder
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190
gtk/gtkcssnode.c
190
gtk/gtkcssnode.c
@ -25,6 +25,8 @@
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#include "gtkmarshalers.h"
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#include "gtksettingsprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkcsssectionprivate.h"
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/*
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* CSS nodes are the backbone of the GtkStyleContext implementation and
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@ -1510,7 +1512,7 @@ GtkStyleProviderPrivate *
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gtk_css_node_get_style_provider (GtkCssNode *cssnode)
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{
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GtkStyleProviderPrivate *result;
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result = gtk_css_node_get_style_provider_or_null (cssnode);
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if (result)
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return result;
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@ -1520,3 +1522,189 @@ gtk_css_node_get_style_provider (GtkCssNode *cssnode)
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return GTK_STYLE_PROVIDER_PRIVATE (_gtk_settings_get_style_cascade (gtk_settings_get_default (), 1));
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}
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static void
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append_id (GtkCssNode *cssnode,
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GString *string)
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{
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const char *id;
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id = gtk_css_node_get_id (cssnode);
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if (id)
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{
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g_string_append (string, " id=");
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g_string_append (string, id);
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}
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}
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static void
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append_visible (GtkCssNode *cssnode,
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GString *string)
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{
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g_string_append_printf (string, " visible=%d", gtk_css_node_get_visible (cssnode));
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}
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static void
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append_state (GtkCssNode *cssnode,
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GString *string)
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{
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GtkStateFlags state;
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state = gtk_css_node_get_state (cssnode);
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if (state)
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{
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GFlagsClass *fclass;
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gint i;
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gboolean first = TRUE;
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g_string_append (string, " state=");
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fclass = g_type_class_ref (GTK_TYPE_STATE_FLAGS);
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for (i = 0; i < fclass->n_values; i++)
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{
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if (state & fclass->values[i].value)
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{
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if (first)
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first = FALSE;
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else
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g_string_append_c (string, '|');
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g_string_append (string, fclass->values[i].value_nick);
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}
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}
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g_type_class_unref (fclass);
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}
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}
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static void
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append_classes (GtkCssNode *cssnode,
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GString *string)
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{
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const GQuark *classes;
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guint n_classes;
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classes = gtk_css_node_list_classes (cssnode, &n_classes);
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if (n_classes > 0)
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{
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int i;
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g_string_append (string, " classes=");
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for (i = 0; i < n_classes; i++)
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{
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if (i > 0)
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g_string_append_c (string, ',');
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g_string_append (string, g_quark_to_string (classes[i]));
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}
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}
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}
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static gboolean
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gtk_css_node_has_initial_value (GtkCssNode *cssnode,
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GtkCssStyleProperty *prop)
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{
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GtkCssNode *parent_node;
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GtkCssStyle *style, *parent_style;
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GtkCssValue *value, *initial, *computed;
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GtkCssProvider *provider;
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gboolean is_initial;
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guint id;
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id = _gtk_css_style_property_get_id (prop);
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style = gtk_css_node_get_style (cssnode);
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value = gtk_css_style_get_value (style, id);
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parent_node = gtk_css_node_get_parent (cssnode);
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parent_style = parent_node ? gtk_css_node_get_style (parent_node) : NULL;
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provider = gtk_css_node_get_style_provider (cssnode);
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initial = _gtk_css_style_property_get_initial_value (prop);
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computed = _gtk_css_value_compute (initial, id, provider, style, parent_style);
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is_initial = _gtk_css_value_equal (value, computed);
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_gtk_css_value_unref (computed);
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return is_initial;
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}
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static void
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append_value (GtkCssNode *cssnode,
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GtkCssStyleProperty *prop,
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GString *string,
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guint indent)
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{
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GtkCssValue *value;
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GtkCssStyle *style;
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GtkCssSection *section;
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const char *name;
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guint id;
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id = _gtk_css_style_property_get_id (prop);
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name = _gtk_style_property_get_name (GTK_STYLE_PROPERTY (prop));
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style = gtk_css_node_get_style (cssnode);
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value = gtk_css_style_get_value (style, id);
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g_string_append_printf (string, "%*s%s: ", indent, "", name);
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_gtk_css_value_print (value, string);
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section = gtk_css_style_get_section (style, id);
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if (section)
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{
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g_string_append (string, " (");
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_gtk_css_section_print (section, string);
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g_string_append (string, ")");
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}
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g_string_append_c (string, '\n');
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}
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static void
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append_style (GtkCssNode *cssnode,
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GtkStyleContextPrintFlags flags,
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GString *string,
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guint indent)
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{
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int i;
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if (!(flags & GTK_STYLE_CONTEXT_PRINT_SHOW_STYLE))
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return;
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for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
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{
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GtkCssStyleProperty *prop;
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prop = _gtk_css_style_property_lookup_by_id (i);
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if ((flags & GTK_STYLE_CONTEXT_PRINT_SHOW_INITIAL) ||
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!gtk_css_node_has_initial_value (cssnode, prop))
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append_value (cssnode, prop, string, indent);
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}
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}
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void
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gtk_css_node_print (GtkCssNode *cssnode,
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GtkStyleContextPrintFlags flags,
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GString *string,
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guint indent)
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{
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GtkCssNode *node;
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g_string_append_printf (string, "%*s", indent, "");
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if (gtk_css_node_get_name (cssnode))
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g_string_append (string, gtk_css_node_get_name (cssnode));
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else
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g_string_append (string, g_type_name (gtk_css_node_get_widget_type (cssnode)));
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append_id (cssnode, string);
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append_visible (cssnode, string);
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append_state (cssnode, string);
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append_classes (cssnode, string);
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g_string_append_c (string, '\n');
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append_style (cssnode, flags, string, indent + 2);
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if (flags & GTK_STYLE_CONTEXT_PRINT_RECURSE)
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{
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for (node = gtk_css_node_get_first_child (cssnode); node; node = gtk_css_node_get_next_sibling (node))
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gtk_css_node_print (node, flags, string, indent + 2);
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}
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}
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@ -171,6 +171,11 @@ GtkWidgetPath * gtk_css_node_create_widget_path (GtkCssNode *
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const GtkWidgetPath * gtk_css_node_get_widget_path (GtkCssNode *cssnode);
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GtkStyleProviderPrivate *gtk_css_node_get_style_provider(GtkCssNode *cssnode);
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void gtk_css_node_print (GtkCssNode *cssnode,
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GtkStyleContextPrintFlags flags,
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GString *string,
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guint indent);
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G_END_DECLS
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#endif /* __GTK_CSS_NODE_PRIVATE_H__ */
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@ -3219,3 +3219,53 @@ _gtk_style_context_is_background_opaque (GtkStyleContext *context)
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corner_value_is_right_angle (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS)) &&
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corner_value_is_right_angle (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS)));
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}
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/**
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* GtkStyleContextPrintFlags:
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* @GTK_STYLE_CONTEXT_PRINT_RECURSE: Print the entire tree of
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* CSS nodes starting at the style context's node
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* @GTK_STYLE_CONTEXT_PRINT_SHOW_STYLE: Show the values of the
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* CSS properties for each node
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* @GTK_STYLE_CONTEXT_PRINT_SHOW_INITIAL: Show the values of the
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* CSS properties even if they match the initial value. By default,
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* values are only shown if they are different from the initial
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* value.
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*
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* Flags that modify the behavior of gtk_style_context_to_string().
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* New values may be added to this enumeration.
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*/
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/**
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* gtk_style_context_to_string:
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* @context: a #GtkStyleContext
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* @flags: Flags that determine what to print
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*
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* Converts the style context into a string representation.
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*
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* The string representation always includes information about
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* the name, state, id, visibility and style classes of the CSS
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* node that is backing @context. Depending on the flags, more
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* information may be included.
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*
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* This function is intended for testing and debugging of the
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* CSS implementation in GTK+. There are no guarantees about
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* the format of the returned string, it may change.
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*
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* Returns: a newly allocated string representing @context
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*
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* Since: 3.20
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*/
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char *
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gtk_style_context_to_string (GtkStyleContext *context,
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GtkStyleContextPrintFlags flags)
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{
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GString *string;
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g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
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string = g_string_new ("");
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gtk_css_node_print (context->priv->cssnode, flags, string, 0);
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return g_string_free (string, FALSE);
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}
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@ -1208,6 +1208,17 @@ void gtk_draw_insertion_cursor (GtkWidget *widget,
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GtkTextDirection direction,
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gboolean draw_arrow);
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typedef enum {
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GTK_STYLE_CONTEXT_PRINT_NONE = 0,
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GTK_STYLE_CONTEXT_PRINT_RECURSE = 1 << 0,
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GTK_STYLE_CONTEXT_PRINT_SHOW_STYLE = 1 << 1,
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GTK_STYLE_CONTEXT_PRINT_SHOW_INITIAL = 1 << 2
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} GtkStyleContextPrintFlags;
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GDK_AVAILABLE_IN_3_20
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char * gtk_style_context_to_string (GtkStyleContext *context,
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GtkStyleContextPrintFlags flags);
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G_END_DECLS
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#endif /* __GTK_STYLE_CONTEXT_H__ */
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