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Add TestFrontend documentation and UndoSystem buffer reference update.

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- Document `TestFrontend` for programmatic testing, including examples and usage details.
- Add `UpdateBufferReference` to `UndoSystem` to support updating buffer associations.
This commit is contained in:
Kyle Isom
2025-11-30 02:56:39 -08:00
parent 91bc986e51
commit 8c8e4e59a4
21 changed files with 5889 additions and 2531 deletions
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31
UndoSystem.cc
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@@ -3,15 +3,15 @@
UndoSystem::UndoSystem(Buffer &owner, UndoTree &tree)
: buf_(owner), tree_(tree) {}
: buf_(&owner), tree_(tree) {}
void
UndoSystem::Begin(UndoType type)
{
// Reuse pending if batching conditions are met
const int row = static_cast<int>(buf_.Cury());
const int col = static_cast<int>(buf_.Curx());
const int row = static_cast<int>(buf_->Cury());
const int col = static_cast<int>(buf_->Curx());
if (tree_.pending && tree_.pending->type == type && tree_.pending->row == row) {
if (type == UndoType::Delete) {
// Support batching both forward deletes (DeleteChar) and backspace (prepend case)
@@ -187,30 +187,30 @@ UndoSystem::apply(const UndoNode *node, int direction)
case UndoType::Insert:
case UndoType::Paste:
if (direction > 0) {
buf_.insert_text(node->row, node->col, node->text);
buf_->insert_text(node->row, node->col, node->text);
} else {
buf_.delete_text(node->row, node->col, node->text.size());
buf_->delete_text(node->row, node->col, node->text.size());
}
break;
case UndoType::Delete:
if (direction > 0) {
buf_.delete_text(node->row, node->col, node->text.size());
buf_->delete_text(node->row, node->col, node->text.size());
} else {
buf_.insert_text(node->row, node->col, node->text);
buf_->insert_text(node->row, node->col, node->text);
}
break;
case UndoType::Newline:
if (direction > 0) {
buf_.split_line(node->row, node->col);
buf_->split_line(node->row, node->col);
} else {
buf_.join_lines(node->row);
buf_->join_lines(node->row);
}
break;
case UndoType::DeleteRow:
if (direction > 0) {
buf_.delete_row(node->row);
buf_->delete_row(node->row);
} else {
buf_.insert_row(node->row, node->text);
buf_->insert_row(node->row, node->text);
}
break;
}
@@ -284,5 +284,12 @@ UndoSystem::update_dirty_flag()
{
// dirty if current != saved
bool dirty = (tree_.current != tree_.saved);
buf_.SetDirty(dirty);
buf_->SetDirty(dirty);
}
void
UndoSystem::UpdateBufferReference(Buffer &new_buf)
{
buf_ = &new_buf;
}