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using Gee;
using Gdk;
using Gtk;
using Pango;
namespace Dino.Ui.ConversationSummary {
public class CodeBlockPart : Object {
public bool is_code;
public string text;
public string language;
public int source_start_char;
public CodeBlockPart.from_text(string text, int source_start_char) {
this.text = text;
this.source_start_char = source_start_char;
this.language = "";
}
public CodeBlockPart.from_code(string text, string language) {
this.is_code = true;
this.text = text;
this.language = language;
}
}
public class CodeBlockParser : Object {
private static Regex? fence_regex;
public static ArrayList<CodeBlockPart> parse(string text, out bool has_blocks) {
var parts = new ArrayList<CodeBlockPart>();
Regex regex = get_fence_regex();
MatchInfo match_info;
int offset = 0;
has_blocks = false;
try {
regex.match_full(text, -1, offset, 0, out match_info);
} catch (RegexError error) {
parts.add(new CodeBlockPart.from_text(text, 0));
return parts;
}
while (match_info.matches()) {
int match_start;
int match_end;
int code_start;
int code_end;
match_info.fetch_pos(0, out match_start, out match_end);
match_info.fetch_pos(2, out code_start, out code_end);
int text_end = match_start;
if (text_end > offset && text[text_end - 1] == '\n') {
text_end--;
if (text_end > offset && text[text_end - 1] == '\r') text_end--;
}
if (text_end > offset) {
parts.add(new CodeBlockPart.from_text(text.substring(offset, text_end - offset), text.substring(0, offset).char_count()));
}
if (code_end > code_start && text[code_end - 1] == '\n') {
code_end--;
if (code_end > code_start && text[code_end - 1] == '\r') code_end--;
}
string code = text.substring(code_start, code_end - code_start).replace("\r\n", "\n");
parts.add(new CodeBlockPart.from_code(code, match_info.fetch(1).strip()));
has_blocks = true;
offset = match_end;
if (offset >= text.length) break;
try {
regex.match_full(text, -1, offset, 0, out match_info);
} catch (RegexError error) {
break;
}
}
if (offset < text.length) {
parts.add(new CodeBlockPart.from_text(text.substring(offset), text.substring(0, offset).char_count()));
}
return parts;
}
private static Regex get_fence_regex() {
if (fence_regex == null) {
try {
fence_regex = new Regex("(?ms)^```[\\t ]*([^\\r\\n`]*)[\\t ]*\\r?\\n(.*?)^```[\\t ]*(?:\\r?\\n|$)", RegexCompileFlags.OPTIMIZE);
} catch (RegexError error) {
GLib.error("Invalid code block expression: %s", error.message);
}
}
return fence_regex;
}
}
public class CodeBlockWidget : Box {
private string code;
private CodeSyntax.LanguageDefinition? definition;
private Label code_label;
private ulong realize_id;
public CodeBlockWidget(string code, string language) {
Object(orientation: Orientation.VERTICAL, spacing: 0, halign: Align.START, overflow: Overflow.HIDDEN);
this.code = code;
definition = CodeSyntax.find(language);
add_css_class("code-block");
var header = new Box(Orientation.HORIZONTAL, 8);
header.add_css_class("code-block-header");
string language_name = definition != null ? definition.name : language.strip();
if (language_name == "") language_name = _("Plain text");
var language_label = new Label(language_name) { xalign=0, hexpand=true };
language_label.add_css_class("code-block-language");
header.append(language_label);
int line_count = code == "" ? 0 : code.split("\n").length;
var line_label = new Label(n("%d line", "%d lines", line_count).printf(line_count));
line_label.add_css_class("code-block-meta");
header.append(line_label);
var download_button = new Button.from_icon_name("dino-file-download-symbolic") {
tooltip_text=_("Download code")
};
download_button.add_css_class("flat");
download_button.add_css_class("code-block-download");
download_button.clicked.connect(save);
header.append(download_button);
append(header);
code_label = new Label(code) {
use_markup=false,
selectable=true,
xalign=0,
yalign=0,
wrap=false
};
code_label.add_css_class("code-block-content");
append(code_label);
apply_highlighting();
realize_id = realize.connect(apply_highlighting);
}
private void apply_highlighting() {
var attributes = new AttrList();
if (definition != null) {
foreach (CodeSyntax.HighlightSpan span in definition.highlight(code)) {
RGBA color = get_token_color(span.style);
Attribute foreground = Pango.attr_foreground_new(
(uint16) Math.round(color.red * uint16.MAX),
(uint16) Math.round(color.green * uint16.MAX),
(uint16) Math.round(color.blue * uint16.MAX)
);
foreground.start_index = span.start;
foreground.end_index = span.end;
attributes.insert(foreground.copy());
if (color.alpha < 1) {
Attribute alpha = Pango.attr_foreground_alpha_new((uint16) Math.round(color.alpha * uint16.MAX));
alpha.start_index = span.start;
alpha.end_index = span.end;
attributes.insert(alpha.copy());
}
}
}
code_label.attributes = attributes;
}
private RGBA get_token_color(CodeSyntax.TokenStyle style) {
StyleContext context = code_label.get_style_context();
RGBA color = context.get_color();
string? color_name = null;
switch (style) {
case CodeSyntax.TokenStyle.COMMENT:
color.alpha = 0.62f;
break;
case CodeSyntax.TokenStyle.CONSTANT:
color_name = "error_color";
break;
case CodeSyntax.TokenStyle.NUMBER:
case CodeSyntax.TokenStyle.PREPROCESSOR:
color_name = "warning_color";
break;
case CodeSyntax.TokenStyle.STRING:
case CodeSyntax.TokenStyle.TYPE:
color_name = "success_color";
break;
case CodeSyntax.TokenStyle.FUNCTION:
case CodeSyntax.TokenStyle.KEYWORD:
color_name = "accent_color";
break;
}
if (color_name != null) {
RGBA theme_color;
if (context.lookup_color(color_name, out theme_color)) color = theme_color;
}
return color;
}
private void save() {
var dialog = new FileChooserNative(_("Save code as…"), get_root() as Gtk.Window, FileChooserAction.SAVE, _("Save"), _("Cancel"));
dialog.modal = true;
dialog.set_current_name("code." + (definition != null ? definition.extension : "txt"));
dialog.response.connect((response_id) => {
if (response_id == ResponseType.ACCEPT) {
File? target = dialog.get_file();
if (target != null) {
try {
string? etag;
target.replace_contents(code.data, null, false, FileCreateFlags.REPLACE_DESTINATION, out etag);
} catch (Error error) {
warning("Failed to save code: %s", error.message);
}
}
}
dialog.destroy();
});
dialog.show();
}
public override void dispose() {
if (realize_id != 0) {
disconnect(realize_id);
realize_id = 0;
}
base.dispose();
}
}
}
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