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Potentially update document’s file type when editing first line

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If an edit to the first line causes the document to match with a different grammar then we switch to this grammar.
This commit is contained in:
Allan Odgaard
2016-06-25 16:38:49 +02:00
parent ca01850b7c
commit 4b0dcce670
1 changed files with 23 additions and 0 deletions
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23
Frameworks/document/src/OakDocument.mm
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@@ -853,16 +853,39 @@ private:
{
callback_t (OakDocument* self) : _self(self) { }
void will_replace (size_t from, size_t to, char const* buf, size_t len)
{
ng::buffer_t const& buffer = [_self buffer];
_editing_first_line = from == oak::cap(buffer.begin(0), from, buffer.eol(0));
_file_type = _editing_first_line ? file_type(buffer) : NULL_STR;
}
void did_replace (size_t from, size_t to, char const* buf, size_t len)
{
_size += len - (to - from);
_self.bufferEmpty = _size == 0;
if(_editing_first_line)
{
std::string const newFileType = file_type([_self buffer]);
if(newFileType != NULL_STR && newFileType != _file_type)
_self.fileType = to_ns(newFileType);
}
[_self scheduleBackup];
}
private:
static std::string file_type (ng::buffer_t const& buffer)
{
return file::type_from_bytes(std::make_shared<io::bytes_t>(buffer.substr(buffer.begin(0), std::min<size_t>(buffer.eol(0), 2048))));
}
size_t _size = 0;
OakDocument* _self;
bool _editing_first_line;
std::string _file_type;
};
_callback = new callback_t(self);