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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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18
demos/node-editor/node-editor-application.c
View File

@ -23,6 +23,16 @@
#include "node-editor-window.h"
static const char *css =
"textview.editor {"
" color: rgb(192, 197, 206);"
" caret-color: white;"
"}"
"textview.editor text {"
" background-color: rgb(43, 48, 59);"
"}"
;
struct _NodeEditorApplication
{
GtkApplication parent;
@ -58,6 +68,7 @@ node_editor_application_startup (GApplication *app)
{
const char *quit_accels[2] = { "<Ctrl>Q", NULL };
const char *open_accels[2] = { "<Ctrl>O", NULL };
GtkCssProvider *provider;
G_APPLICATION_CLASS (node_editor_application_parent_class)->startup (app);
@ -66,6 +77,13 @@ node_editor_application_startup (GApplication *app)
app);
gtk_application_set_accels_for_action (GTK_APPLICATION (app), "app.quit", quit_accels);
gtk_application_set_accels_for_action (GTK_APPLICATION (app), "win.open", open_accels);
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, css, -1);
gtk_style_context_add_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
static void

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 *

16
demos/node-editor/node-editor-window.ui
View File

@ -1,17 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<object class="GtkTextTagTable" id="tags">
<child type="tag">
<object class="GtkTextTag">
<property name="name">error</property>
<property name="underline">error</property>
</object>
</child>
</object>
<object class="GtkTextBuffer" id="text_buffer">
<property name="tag-table">tags</property>
<signal name="changed" handler="text_changed"/>
</object>
<template class="NodeEditorWindow" parent="GtkApplicationWindow">
<style>
<class name="devel"/>
@ -61,7 +49,6 @@
<property name="expand">1</property>
<child>
<object class="GtkTextView" id="text_view">
<property name="buffer">text_buffer</property>
<property name="wrap-mode">word</property>
<property name="monospace">1</property>
<property name="has-focus">1</property>
@ -71,6 +58,9 @@
<property name="bottom-margin">6</property>
<property name="has-tooltip">1</property>
<signal name="query-tooltip" handler="text_view_query_tooltip_cb"/>
<style>
<class name="editor" />
</style>
</object>
</child>
</object>