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LibGUI: Implement merging of TextDocument's InsertTextCommand

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When performing multiple text insertions in a row, they will now
be merged into a single InsertTextCommand.
This commit is contained in:
Andreas Kling 2021-05-08 16:52:08 +02:00
parent ff912946ae
commit ff6bac4854
2 changed files with 16 additions and 0 deletions
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15
Userland/Libraries/LibGUI/TextDocument.cpp
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@ -719,6 +719,21 @@ InsertTextCommand::InsertTextCommand(TextDocument& document, const String& text,
{ {
} }
bool InsertTextCommand::merge_with(GUI::Command const& other)
{
if (!is<InsertTextCommand>(other))
return false;
auto& typed_other = static_cast<InsertTextCommand const&>(other);
if (m_range.end() != typed_other.m_range.start())
return false;
StringBuilder builder(m_text.length() + typed_other.m_text.length());
builder.append(m_text);
builder.append(typed_other.m_text);
m_text = builder.to_string();
m_range.set_end(typed_other.m_range.end());
return true;
}
void InsertTextCommand::perform_formatting(const TextDocument::Client& client) void InsertTextCommand::perform_formatting(const TextDocument::Client& client)
{ {
const size_t tab_width = client.soft_tab_width(); const size_t tab_width = client.soft_tab_width();

1
Userland/Libraries/LibGUI/TextDocument.h
View file

@ -206,6 +206,7 @@ public:
virtual void perform_formatting(const TextDocument::Client&) override; virtual void perform_formatting(const TextDocument::Client&) override;
virtual void undo() override; virtual void undo() override;
virtual void redo() override; virtual void redo() override;
virtual bool merge_with(GUI::Command const&) override;
const String& text() const { return m_text; } const String& text() const { return m_text; }
const TextRange& range() const { return m_range; } const TextRange& range() const { return m_range; }