void InitMessageField(
not_null<Window::Controller*> controller,
not_null<Ui::InputField*> field) {
field->setMinHeight(st::historySendSize.height() - 2 * st::historySendPadding);
field->setMaxHeight(st::historyComposeFieldMaxHeight);
field->setTagMimeProcessor(std::make_unique<FieldTagMimeProcessor>());
field->document()->setDocumentMargin(4.);
field->setAdditionalMargin(convertScale(4) - 4);
field->customTab(true);
field->setInstantReplaces(Ui::InstantReplaces::Default());
field->setInstantReplacesEnabled(Global::ReplaceEmojiValue());
field->setMarkdownReplacesEnabled(rpl::single(true));
field->setEditLinkCallback(
DefaultEditLinkCallback(controller, field));
}
AutocompleteQuery ParseMentionHashtagBotCommandQuery(
not_null<const Ui::InputField*> field) {
auto result = AutocompleteQuery();
const auto cursor = field->textCursor();
if (cursor.hasSelection()) {
return result;
}
const auto position = cursor.position();
const auto document = field->document();
const auto block = document->findBlock(position);
for (auto item = block.begin(); !item.atEnd(); ++item) {
const auto fragment = item.fragment();
if (!fragment.isValid()) {
continue;
}
const auto fragmentPosition = fragment.position();
const auto fragmentEnd = fragmentPosition + fragment.length();
if (fragmentPosition >= position || fragmentEnd < position) {
continue;
}
const auto format = fragment.charFormat();
if (format.isImageFormat()) {
continue;
}
bool mentionInCommand = false;
const auto text = fragment.text();
for (auto i = position - fragmentPosition; i != 0; --i) {
if (text[i - 1] == '@') {
if ((position - fragmentPosition - i < 1 || text[i].isLetter()) && (i < 2 || !(text[i - 2].isLetterOrNumber() || text[i - 2] == '_'))) {
result.fromStart = (i == 1) && (fragmentPosition == 0);
result.query = text.mid(i - 1, position - fragmentPosition - i + 1);
} else if ((position - fragmentPosition - i < 1 || text[i].isLetter()) && i > 2 && (text[i - 2].isLetterOrNumber() || text[i - 2] == '_') && !mentionInCommand) {
mentionInCommand = true;
--i;
continue;
}
return result;
} else if (text[i - 1] == '#') {
if (i < 2 || !(text[i - 2].isLetterOrNumber() || text[i - 2] == '_')) {
result.fromStart = (i == 1) && (fragmentPosition == 0);
result.query = text.mid(i - 1, position - fragmentPosition - i + 1);
}
return result;
} else if (text[i - 1] == '/') {
if (i < 2) {
result.fromStart = (i == 1) && (fragmentPosition == 0);
result.query = text.mid(i - 1, position - fragmentPosition - i + 1);
}
return result;
}
if (position - fragmentPosition - i > 127 || (!mentionInCommand && (position - fragmentPosition - i > 63))) {
break;
}
if (!text[i - 1].isLetterOrNumber() && text[i - 1] != '_') {
break;
}
}
break;
}
return result;
}