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LibGUI: Add search API to TextEditor with highlighted results

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This adds a search API to TextEditor.

The API that is similar to "find_text" of TextDocument (which is used
internally to do the search).

All search results (as well as the current one) are highlighted with
a "span collection", which is pretty neat :^)
This commit is contained in:
Itamar 2022-03-29 16:33:46 +03:00 • committed by Andreas Kling
parent a12385dc4b
commit 5f2a0f03a6
2 changed files with 75 additions and 1 deletions
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59
Userland/Libraries/LibGUI/TextEditor.cpp
View file

@ -1,6 +1,7 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Jakob-Niklas See <git@nwex.de>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -2105,4 +2106,62 @@ void TextEditor::set_text_is_secret(bool text_is_secret)
did_update_selection();
}
TextRange TextEditor::find_text(StringView needle, SearchDirection direction, GUI::TextDocument::SearchShouldWrap should_wrap, bool use_regex, bool match_case)
{
GUI::TextRange range {};
if (direction == SearchDirection::Forward) {
range = document().find_next(needle,
m_search_result_index.has_value() ? m_search_results[*m_search_result_index].end() : GUI::TextPosition {},
should_wrap, use_regex, match_case);
} else {
range = document().find_previous(needle,
m_search_result_index.has_value() ? m_search_results[*m_search_result_index].start() : GUI::TextPosition {},
should_wrap, use_regex, match_case);
}
if (!range.is_valid()) {
reset_search_results();
return {};
}
auto all_results = document().find_all(needle, use_regex, match_case);
on_search_results(range, all_results);
return range;
}
void TextEditor::reset_search_results()
{
m_search_result_index.clear();
m_search_results.clear();
document().set_spans(search_results_span_collection_index, {});
update();
}
void TextEditor::on_search_results(GUI::TextRange current, Vector<GUI::TextRange> all_results)
{
m_search_result_index.clear();
m_search_results.clear();
set_cursor(current.start());
if (auto it = all_results.find(current); it->is_valid())
m_search_result_index = it.index();
m_search_results = move(all_results);
Vector<GUI::TextDocumentSpan> spans;
for (size_t i = 0; i < m_search_results.size(); ++i) {
auto& result = m_search_results[i];
GUI::TextDocumentSpan span;
span.range = result;
span.attributes.background_color = palette().hover_highlight();
span.attributes.color = Color::from_argb(0xff000000); // So text without spans from a highlighter will have color
if (i == m_search_result_index) {
span.attributes.bold = true;
span.attributes.underline = true;
}
spans.append(move(span));
}
document().set_spans(search_results_span_collection_index, move(spans));
update();
}
}