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node editor: Do some simple syntax highlighting

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This commit is contained in:
Timm Bäder
2019-05-07 17:19:58 +02:00
parent 730b52b084
commit b3c4320bc2
3 changed files with 154 additions and 15 deletions
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135
demos/node-editor/node-editor-window.c
View File

@@ -39,6 +39,7 @@ struct _NodeEditorWindow
GtkWidget *picture;
GtkWidget *text_view;
GtkTextBuffer *text_buffer;
GtkTextTagTable *tag_table;
GtkWidget *renderer_listbox;
GListStore *renderers;
@@ -99,6 +100,42 @@ deserialize_error_func (const GtkCssSection *section,
g_array_append_val (self->errors, text_view_error);
}
static void
text_iter_skip_alpha_backward (GtkTextIter *iter)
{
/* Just skip to the previous non-whitespace char */
while (!gtk_text_iter_is_start (iter))
{
gunichar c = gtk_text_iter_get_char (iter);
if (g_unichar_isspace (c))
{
gtk_text_iter_forward_char (iter);
break;
}
gtk_text_iter_backward_char (iter);
}
}
static void
text_iter_skip_whitespace_backward (GtkTextIter *iter)
{
while (!gtk_text_iter_is_start (iter))
{
gunichar c = gtk_text_iter_get_char (iter);
if (g_unichar_isalpha (c))
{
gtk_text_iter_forward_char (iter);
break;
}
gtk_text_iter_backward_char (iter);
}
}
static void
text_changed (GtkTextBuffer *buffer,
NodeEditorWindow *self)
@@ -141,6 +178,71 @@ text_changed (GtkTextBuffer *buffer,
{
gtk_picture_set_paintable (GTK_PICTURE (self->picture), NULL);
}
GtkTextIter iter;
gtk_text_buffer_get_start_iter (self->text_buffer, &iter);
while (!gtk_text_iter_is_end (&iter))
{
gunichar c = gtk_text_iter_get_char (&iter);
if (c == '{')
{
GtkTextIter word_end = iter;
GtkTextIter word_start;
gtk_text_iter_backward_char (&word_end);
text_iter_skip_whitespace_backward (&word_end);
word_start = word_end;
gtk_text_iter_backward_word_start (&word_start);
text_iter_skip_alpha_backward (&word_start);
gtk_text_buffer_apply_tag_by_name (self->text_buffer, "nodename",
&word_start, &word_end);
}
else if (c == ':')
{
GtkTextIter word_end = iter;
GtkTextIter word_start;
gtk_text_iter_backward_char (&word_end);
text_iter_skip_whitespace_backward (&word_end);
word_start = word_end;
gtk_text_iter_backward_word_start (&word_start);
text_iter_skip_alpha_backward (&word_start);
gtk_text_buffer_apply_tag_by_name (self->text_buffer, "propname",
&word_start, &word_end);
}
else if (c == '"')
{
GtkTextIter string_start = iter;
GtkTextIter string_end = iter;
gtk_text_iter_forward_char (&iter);
while (!gtk_text_iter_is_end (&iter))
{
c = gtk_text_iter_get_char (&iter);
if (c == '"')
{
gtk_text_iter_forward_char (&iter);
string_end = iter;
break;
}
gtk_text_iter_forward_char (&iter);
}
gtk_text_buffer_apply_tag_by_name (self->text_buffer, "string",
&string_start, &string_end);
}
gtk_text_iter_forward_char (&iter);
}
}
static gboolean
@@ -493,12 +595,10 @@ node_editor_window_class_init (NodeEditorWindowClass *class)
widget_class->realize = node_editor_window_realize;
widget_class->unrealize = node_editor_window_unrealize;
gtk_widget_class_bind_template_child (widget_class, NodeEditorWindow, text_buffer);
gtk_widget_class_bind_template_child (widget_class, NodeEditorWindow, text_view);
gtk_widget_class_bind_template_child (widget_class, NodeEditorWindow, picture);
gtk_widget_class_bind_template_child (widget_class, NodeEditorWindow, renderer_listbox);
gtk_widget_class_bind_template_callback (widget_class, text_changed);
gtk_widget_class_bind_template_callback (widget_class, text_view_query_tooltip_cb);
gtk_widget_class_bind_template_callback (widget_class, open_cb);
gtk_widget_class_bind_template_callback (widget_class, save_cb);
@@ -559,6 +659,37 @@ node_editor_window_init (NodeEditorWindow *self)
g_array_set_clear_func (self->errors, (GDestroyNotify)text_view_error_free);
g_action_map_add_action_entries (G_ACTION_MAP (self), win_entries, G_N_ELEMENTS (win_entries), self);
self->tag_table = gtk_text_tag_table_new ();
gtk_text_tag_table_add (self->tag_table,
g_object_new (GTK_TYPE_TEXT_TAG,
"name", "error",
"underline", PANGO_UNDERLINE_ERROR,
NULL));
gtk_text_tag_table_add (self->tag_table,
g_object_new (GTK_TYPE_TEXT_TAG,
"name", "nodename",
"foreground-rgba", &(GdkRGBA) { 0.9, 0.78, 0.53, 1},
NULL));
gtk_text_tag_table_add (self->tag_table,
g_object_new (GTK_TYPE_TEXT_TAG,
"name", "propname",
"foreground-rgba", &(GdkRGBA) { 0.7, 0.55, 0.67, 1},
NULL));
gtk_text_tag_table_add (self->tag_table,
g_object_new (GTK_TYPE_TEXT_TAG,
"name", "string",
"foreground-rgba", &(GdkRGBA) { 0.63, 0.73, 0.54, 1},
NULL));
gtk_text_tag_table_add (self->tag_table,
g_object_new (GTK_TYPE_TEXT_TAG,
"name", "number",
"foreground-rgba", &(GdkRGBA) { 0.8, 0.52, 0.43, 1},
NULL));
self->text_buffer = gtk_text_buffer_new (self->tag_table);
g_signal_connect (self->text_buffer, "changed", G_CALLBACK (text_changed), self);
gtk_text_view_set_buffer (GTK_TEXT_VIEW (self->text_view), self->text_buffer);
}
NodeEditorWindow *