public Term (Term parent, Literal after)
{
this.parent = parent;
if (parent != null) {
if (after == null)
parent.Add (this);
else
parent.SubTerms.Insert (parent.SubTerms.IndexOf (after) + 1, this);
}
}
protected Term(Term parent, Literal after)
{
this.parent = parent;
SubTerms = new List<Term> ();
if (parent != null)
if (after == null) {
parent.Add (this);
} else {
parent.SubTerms.Insert (parent.SubTerms.IndexOf (after) + 1, this);
}
}
public void Add(Term term)
{
SubTerms.Add (term);
}
public static Term TermFromOperator(string op, Term parent, Literal after)
{
//Console.WriteLine ("finding type for operator {0}", op);
//op = op.Trim ();
op = op.ToLower ();
if (AndTerm.Operators.Contains (op))
return new AndTerm (parent, after);
if (OrTerm.Operators.Contains (op))
return new OrTerm (parent, after);
Log.DebugFormat ("Do not have Term for operator {0}", op);
return null;
}
private void Update()
{
// Clear the last root term
root_term = null;
if (ParensValid () && ConstructQuery (null, 0, entry.Text)) {
if (RootTerm != null) {
//Log.DebugFormat("rootTerm = {0}", RootTerm);
if (!(RootTerm is AndTerm)) {
// A little hacky, here to make sure the root term is a AndTerm which will
// ensure we handle the Hidden tag properly
AndTerm root_parent = new AndTerm(null, null);
RootTerm.Parent = root_parent;
root_term = root_parent;
}
//Log.DebugFormat("rootTerm = {0}", RootTerm);
if (!(RootTerm is AndTerm)) {
// A little hacky, here to make sure the root term is a AndTerm which will
// ensure we handle the Hidden tag properly
AndTerm root_parent = new AndTerm(null, null);
RootTerm.Parent = root_parent;
root_term = root_parent;
}
//Log.DebugFormat ("condition = {0}", RootTerm.SqlCondition ());
query.TagTerm = new ConditionWrapper (RootTerm.SqlCondition ());
} else {
query.TagTerm = null;
//Log.Debug ("root term is null");
}
}
}
public AbstractLiteral(Term parent, Literal after) : base (parent, after) {}
void HandleTagsAdded(Tag[] tags, Term parent, Literal after)
{
InsertTerm (tags, parent, after);
}
void HandleAttachTag(Tag tag, Term parent, Literal after)
{
InsertTerm (new Tag [] {tag}, parent, after);
}
private static bool AppendTerm (ArrayList parts, Term term, Tag single_tag)
{
bool tag_matches = false;
if (term != null) {
Literal literal = term as Literal;
if (literal != null) {
if (literal.Tag == single_tag)
tag_matches = true;
if (literal.IsNegated)
parts.Add (String.Format (Catalog.GetString ("Not {0}"), literal.Tag.Name));
else
parts.Add (literal.Tag.Name);
} else {
foreach (Term subterm in term.SubTerms) {
tag_matches |= AppendTerm (parts, subterm, single_tag);
}
}
}
return tag_matches;
}
public Literal(Term parent, Tag tag, Literal after)
: base(parent, after)
{
Tag = tag;
}
public OrTerm(Term parent, Literal after)
: base(parent, after)
{
}
public ArrayList InsertTerm(Tag [] tags, Term parent, Literal after)
{
int position;
if (after != null)
{
position = WidgetPosition(after.Widget) + 1;
}
else
{
position = Children.Length - 1;
}
ArrayList added = new ArrayList();
foreach (Tag tag in tags)
{
//Console.WriteLine ("Adding tag {0}", tag.Name);
// Don't put a tag into a Term twice
if (parent != Root && (parent.FindByTag(tag, true)).Count > 0)
{
continue;
}
if (parent.Count > 0)
{
Widget sep = parent.SeparatorWidget();
InsertWidget(position, sep);
position++;
}
// Encapsulate new OR terms within a new AND term of which they are the
// only member, so later other terms can be AND'd with them
//
// TODO should really see what type of term the parent is, and
// encapsulate this term in a term of the opposite type. This will
// allow the query system to be expanded to work for multiple levels much easier.
if (parent == rootTerm)
{
parent = new AndTerm(rootTerm, after);
after = null;
}
Literal term = new Literal(parent, tag, after);
term.TermAdded += HandleTermAdded;
term.LiteralsMoved += HandleLiteralsMoved;
term.AttachTag += HandleAttachTag;
term.NegatedToggled += HandleNegated;
term.Removing += HandleRemoving;
term.Removed += HandleRemoved;
term.RequireTag += Require;
term.UnRequireTag += UnRequire;
added.Add(term);
// Insert this widget into the appropriate place in the hbox
InsertWidget(position, term.Widget);
}
UpdateQuery();
return(added);
}
private void HandleAttachTag(Tag tag, Term parent, Literal after)
{
InsertTerm(new Tag [] { tag }, parent, after);
}
private void HandleTermAdded(Term parent, Literal after)
{
InsertTerm(parent, after);
}
public TextLiteral (Term parent, string text) : base (parent, null)
{
this.text = text;
}
public void CopyAndInvertSubTermsFrom(Term term, bool recurse)
{
is_negated = true;
var termsToMove = new List<Term> (term.SubTerms);
foreach (Term subterm in termsToMove) {
if (recurse)
subterm.Invert (true).Parent = this;
else
subterm.Parent = this;
}
}
public void Remove(Term term)
{
SubTerms.Remove (term);
// Remove ourselves if we're now empty
if (SubTerms.Count == 0 && Parent != null)
Parent.Remove (this);
}
private void HandleTermAdded (Term parent, Literal after)
{
InsertTerm (parent, after);
}
public List<Literal> InsertTerm(Tag [] tags, Term parent, Literal after)
{
int position;
if (after != null)
position = WidgetPosition (after.Widget) + 1;
else
position = Children.Length - 1;
var added = new List<Literal>();
foreach (Tag tag in tags) {
//Console.WriteLine ("Adding tag {0}", tag.Name);
// Don't put a tag into a Term twice
if (parent != Root && (parent.FindByTag (tag, true)).Count > 0)
continue;
if (parent.Count > 0) {
Widget sep = parent.SeparatorWidget ();
InsertWidget (position, sep);
position++;
}
// Encapsulate new OR terms within a new AND term of which they are the
// only member, so later other terms can be AND'd with them
//
// TODO should really see what type of term the parent is, and
// encapsulate this term in a term of the opposite type. This will
// allow the query system to be expanded to work for multiple levels much easier.
if (parent == rootTerm) {
parent = new AndTerm (rootTerm, after);
after = null;
}
Literal term = new Literal (parent, tag, after);
term.TagsAdded += HandleTagsAdded;
term.LiteralsMoved += HandleLiteralsMoved;
term.AttachTag += HandleAttachTag;
term.NegatedToggled += HandleNegated;
term.Removing += HandleRemoving;
term.Removed += HandleRemoved;
term.RequireTag += Require;
term.UnRequireTag += UnRequire;
added.Add (term);
// Insert this widget into the appropriate place in the hbox
InsertWidget (position, term.Widget);
}
UpdateQuery ();
return added;
}
private void InsertTerm (Term parent, Literal after)
{
if (Literal.FocusedLiterals.Count != 0) {
HandleLiteralsMoved (Literal.FocusedLiterals, parent, after);
// Prevent them from being removed again
Literal.FocusedLiterals = null;
}
else
InsertTerm (tag_selection_widget.TagHighlight, parent, after);
}
void HandleLiteralsMoved(List<Literal> literals, Term parent, Literal after)
{
preventUpdate = true;
foreach (Literal term in literals) {
Tag tag = term.Tag;
// Don't listen for it to be removed since we are
// moving it. We will update when we're done.
term.Removed -= HandleRemoved;
term.RemoveSelf ();
// Add it to where it was dropped
List<Literal> groups = InsertTerm (new [] {tag}, parent, after);
if (term.IsNegated)
foreach (Literal group in groups)
group.IsNegated = true;
}
preventUpdate = false;
UpdateQuery ();
}
// Breaking the query the user typed into something useful involves running
// it through the above regular expression recursively until it is broken down
// into literals and operators that we can use to generate SQL queries.
private bool ConstructQuery(Term parent, int depth, string txt)
{
return ConstructQuery(parent, depth, txt, false);
}
void Init()
{
sepBox = null;
preview = false;
rootAdd = new Gtk.EventBox ();
rootAdd.VisibleWindow = false;
rootAdd.CanFocus = true;
rootAdd.DragMotion += HandleDragMotion;
rootAdd.DragDataReceived += HandleDragDataReceived;
rootAdd.DragLeave += HandleDragLeave;
help = new Gtk.Label ("<i>" + Catalog.GetString ("Drag tags here to search for them") + "</i>");
help.UseMarkup = true;
help.Visible = true;
rootBox = new HBox();
rootBox.Add (help);
rootBox.Show ();
rootAdd.Child = rootBox;
rootAdd.Show ();
Gtk.Drag.DestSet (rootAdd, DestDefaults.All, tag_dest_target_table,
DragAction.Copy | DragAction.Move );
PackEnd (rootAdd, true, true, 0);
rootTerm = new OrTerm (null, null);
}
private bool ConstructQuery(Term parent, int depth, string txt, bool negated)
{
if (string.IsNullOrEmpty(txt))
return true;
string indent = String.Format ("{0," + depth*2 + "}", " ");
//Log.DebugFormat (indent + "Have text: {0}", txt);
// Match the query the user typed against our regular expression
Match match = term_regex.Match (txt);
if (!match.Success) {
//Log.Debug (indent + "Failed to match.");
return false;
}
bool op_valid = true;
string op = String.Empty;
// For the moment at least we don't support operator precedence, so we require
// that only a single operator is used for any given term unless it is made unambiguous
// by using parenthesis.
foreach (Capture capture in match.Groups ["Ops"].Captures) {
if (op == String.Empty)
op = capture.Value;
else if (op != capture.Value) {
op_valid = false;
break;
}
}
if (!op_valid) {
Log.Information (indent + "Ambiguous operator sequence. Use parenthesis to explicitly define evaluation order.");
return false;
}
if (match.Groups ["Terms"].Captures.Count == 1 && match.Groups["NotTerm"].Captures.Count != 1) {
//Log.DebugFormat (indent + "Unbreakable term: {0}", match.Groups ["Terms"].Captures [0]);
string literal;
bool is_negated = false;
Tag tag = null;
if (match.Groups ["NotTag"].Captures.Count == 1) {
literal = match.Groups ["NotTag"].Captures [0].Value;
is_negated = true;
} else {
literal = match.Groups ["Terms"].Captures [0].Value;
}
is_negated = is_negated || negated;
tag = App.Instance.Database.Tags.GetTagByName (literal);
// New OR term so we can match against both tag and text search
parent = new OrTerm(parent, null);
// If the literal is the name of a tag, include it in the OR
//AbstractLiteral term = null;
if (tag != null) {
new Literal (parent, tag, null);
}
// Always include the literal text in the search (path, comment, etc)
new TextLiteral (parent, literal);
// If the term was negated, negate the OR parent term
if (is_negated) {
parent = parent.Invert(true);
}
if (RootTerm == null)
root_term = parent;
return true;
} else {
Term us = null;
if (op != null && op != String.Empty) {
us = Term.TermFromOperator (op, parent, null);
if (RootTerm == null)
root_term = us;
}
foreach (Capture capture in match.Groups ["Term"].Captures) {
string subterm = capture.Value.Trim ();
if (subterm == null || subterm.Length == 0)
continue;
// Strip leading/trailing parens
if (subterm [0] == '(' && subterm [subterm.Length - 1] == ')') {
subterm = subterm.Remove (subterm.Length - 1, 1);
subterm = subterm.Remove (0, 1);
}
//Log.DebugFormat (indent + "Breaking subterm apart: {0}", subterm);
if (!ConstructQuery (us, depth + 1, subterm, negated))
return false;
}
foreach (Capture capture in match.Groups ["NotTerm"].Captures) {
string subterm = capture.Value.Trim ();
if (subterm == null || subterm.Length == 0)
continue;
// Strip leading/trailing parens
if (subterm [0] == '(' && subterm [subterm.Length - 1] == ')') {
subterm = subterm.Remove (subterm.Length - 1, 1);
subterm = subterm.Remove (0, 1);
}
//Log.DebugFormat (indent + "Breaking not subterm apart: {0}", subterm);
if (!ConstructQuery (us, depth + 1, subterm, true))
return false;
}
if (negated && us != null) {
if (us == RootTerm)
root_term = us.Invert(false);
else
us.Invert(false);
}
return true;
}
}
