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Code Issues Projects Releases Packages Wiki Activity Actions 9

LibGUI: Support multiple GTextEditors editing the same GTextDocument

Browse source 
With this patch, you can now assign the same GTextDocument to multiple
GTextEditor widgets via GTextEditor::set_document().

The editors have independent cursors and selection, but all changes
are shared, and immediately propagate to all editors.

This is very unoptimized and will do lots of unnecessary invalidation,
especially line re-wrapping and repainting over and over again.
This commit is contained in:
Andreas Kling 2019-10-27 19:36:59 +01:00
parent f96c683543
commit 9b13a3905b
Notes: sideshowbarker 2024-07-19 11:31:08 +09:00
4 changed files with 101 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

48
Libraries/LibGUI/GTextDocument.cpp
View file

@ -5,7 +5,7 @@ GTextDocument::GTextDocument(Client* client)
{
if (client)
m_clients.set(client);
append_line(make<GTextDocumentLine>());
append_line(make<GTextDocumentLine>(*this));
}
void GTextDocument::set_text(const StringView& text)
@ -17,9 +17,9 @@ void GTextDocument::set_text(const StringView& text)
auto add_line = [&](int current_position) {
int line_length = current_position - start_of_current_line;
auto line = make<GTextDocumentLine>();
auto line = make<GTextDocumentLine>(*this);
if (line_length)
line->set_text(text.substring_view(start_of_current_line, current_position - start_of_current_line));
line->set_text(*this, text.substring_view(start_of_current_line, current_position - start_of_current_line));
append_line(move(line));
start_of_current_line = current_position + 1;
};
@ -40,53 +40,56 @@ int GTextDocumentLine::first_non_whitespace_column() const
return length();
}
GTextDocumentLine::GTextDocumentLine()
GTextDocumentLine::GTextDocumentLine(GTextDocument& document)
{
clear();
clear(document);
}
GTextDocumentLine::GTextDocumentLine(const StringView& text)
GTextDocumentLine::GTextDocumentLine(GTextDocument& document, const StringView& text)
{
set_text(text);
set_text(document, text);
}
void GTextDocumentLine::clear()
void GTextDocumentLine::clear(GTextDocument& document)
{
m_text.clear();
m_text.append(0);
document.update_views({});
}
void GTextDocumentLine::set_text(const StringView& text)
void GTextDocumentLine::set_text(GTextDocument& document, const StringView& text)
{
if (text.length() == length() && !memcmp(text.characters_without_null_termination(), characters(), length()))
return;
if (text.is_empty()) {
clear();
clear(document);
return;
}
m_text.resize(text.length() + 1);
memcpy(m_text.data(), text.characters_without_null_termination(), text.length() + 1);
document.update_views({});
}
void GTextDocumentLine::append(const char* characters, int length)
void GTextDocumentLine::append(GTextDocument& document, const char* characters, int length)
{
int old_length = m_text.size() - 1;
m_text.resize(m_text.size() + length);
memcpy(m_text.data() + old_length, characters, length);
m_text.last() = 0;
document.update_views({});
}
void GTextDocumentLine::append(char ch)
void GTextDocumentLine::append(GTextDocument& document, char ch)
{
insert(length(), ch);
insert(document, length(), ch);
}
void GTextDocumentLine::prepend(char ch)
void GTextDocumentLine::prepend(GTextDocument& document, char ch)
{
insert(0, ch);
insert(document, 0, ch);
}
void GTextDocumentLine::insert(int index, char ch)
void GTextDocumentLine::insert(GTextDocument& document, int index, char ch)
{
if (index == length()) {
m_text.last() = ch;
@ -94,9 +97,10 @@ void GTextDocumentLine::insert(int index, char ch)
} else {
m_text.insert(index, move(ch));
}
document.update_views({});
}
void GTextDocumentLine::remove(int index)
void GTextDocumentLine::remove(GTextDocument& document, int index)
{
if (index == length()) {
m_text.take_last();
@ -104,12 +108,14 @@ void GTextDocumentLine::remove(int index)
} else {
m_text.remove(index);
}
document.update_views({});
}
void GTextDocumentLine::truncate(int length)
void GTextDocumentLine::truncate(GTextDocument& document, int length)
{
m_text.resize(length + 1);
m_text.last() = 0;
document.update_views({});
}
void GTextDocument::append_line(NonnullOwnPtr<GTextDocumentLine> line)
@ -153,3 +159,9 @@ void GTextDocument::unregister_client(Client& client)
{
m_clients.remove(&client);
}
void GTextDocument::update_views(Badge<GTextDocumentLine>)
{
for (auto* client : m_clients)
client->document_did_change();
}