X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=MInputMethod.cs;h=be452c1f92fbbe6522edbcf5ed3f9d49777e2b9a;hb=3c39b282b53d78ca6e76ababf377aec3a081303a;hp=e75f5bcc77c4f5d73782f9a770d21bc8db3ff2ab;hpb=995e782899740644d2237ce1339925fe3f52a0f3;p=m17n%2Fm17n-lib-cs.git diff --git a/MInputMethod.cs b/MInputMethod.cs index e75f5bc..be452c1 100644 --- a/MInputMethod.cs +++ b/MInputMethod.cs @@ -9,59 +9,68 @@ using M17N; using M17N.Core; using M17N.Input; +using Xex = System.Xml.Expression.Xexpression; + namespace M17N.Input { - using Xex = System.Xml.Expression.Xexpression; - public class MInputMethod { // Delegaes - public delegate bool Callback (MInputContext ic, MPlist args); + public delegate bool Callback (Context ic, MPlist args); // Class members - public static Callback PreeditStart, PreeditDone, PreeditDraw; - public static Callback StatusStart, StatusDone, StatusDraw; - public static Callback CandidateStart, CandidateDone, CandidateDraw; - public static Callback SetSpot; - public static Callback Toggle; - public static Callback Reset; + public static event Callback PreeditChanged; + public static event Callback StatusChanged; + public static event Callback CandidateChanged; public static Callback GetSurroundingText; public static Callback DeleteSurroundingText; - internal static Xex.Domain im_domain = new Xex.Domain (null); + internal static Xex.Domain im_domain + = new Xex.Domain ("input-method", null); private static MSymbol Minput_method = "input-method"; private static MSymbol Mdescription = "description"; private static MSymbol Mvariable = "variable"; private static MSymbol Mcommand = "command"; private static MSymbol Mmodule = "module"; - private static MSymbol Mmodule_list = "module-list"; private static MSymbol Mtitle = "title"; private static MSymbol Minclude = "include"; private static MSymbol Mmacro = "macro"; - private static MSymbol Mmacro_list = "macro-list"; private static MSymbol Mmap = "map"; private static MSymbol Mmap_list = "map-list"; private static MSymbol Mstate = "state"; - private static MSymbol Mstate_list = "state-list"; internal static MSymbol Mcandidates = "candidates"; - private static MSymbol Minsert = "insert"; - private static MSymbol Mdelete = "delete"; - private static MSymbol Mmove = "move"; - private static MSymbol Mmark = "mark"; - private static MSymbol Mmarker = "marker"; - private static MSymbol Mset = "set"; - private static MSymbol Madd = "add"; - private static MSymbol Msub = "sub"; - private static MSymbol Mmul = "mul"; - private static MSymbol Mdiv = "div"; - private static MSymbol Mif = "if"; - private static MSymbol Mcond = "cond"; - private static MSymbol Mchar_at = "char-at"; - private static MSymbol Msurrounding_text_p = "surrounding-text-p"; - private static MSymbol Mpushback = "pushback"; - private static MSymbol Mkeyseq = "keyseq"; - - private static Xex.Symbol Nprogn = "progn"; + private static MSymbol Mat_minus_zero = "@-0"; + + private static Xex.Symbol Qmap = "map"; + private static Xex.Symbol Qrule = "rule"; + private static Xex.Symbol Qkeyseq = "keyseq"; + private static Xex.Symbol Qprogn = "progn"; + private static Xex.Symbol Qcatch = "catch"; + private static Xex.Symbol Qinsert = "insert"; + private static Xex.Symbol Qinsert_candidates = "insert-candidates"; + private static Xex.Symbol Qchar_at = "char-at"; + private static Xex.Symbol Qselect = "select"; + private static Xex.Symbol Qdelete = "delete"; + private static Xex.Symbol Qshift = "shift"; + private static Xex.Symbol Qmove = "move"; + private static Xex.Symbol Qmark = "mark"; + private static Xex.Symbol Qset = "set"; + private static Xex.Symbol Qadd = "add"; + private static Xex.Symbol Qsub = "sub"; + private static Xex.Symbol Qmul = "mul"; + private static Xex.Symbol Qdiv = "div"; + private static Xex.Symbol Qcond = "cond"; + private static Xex.Symbol Qsname = "sname"; + private static Xex.Symbol Qmname = "mname"; + private static Xex.Symbol Qstate_hook = "state-hook"; + private static Xex.Symbol Qcatch_all_branch = "catch-all-branch"; + private static Xex.Symbol Qbranch = "branch"; + private static Xex.Symbol Qstate = "state"; + private static Xex.Symbol Qtitle = "title"; + private static Xex.Symbol Qeq = "="; + private static Xex.Symbol Qeqeq = "=="; + private static Xex.Symbol Qcandidates_group_size = "candidates-group-size"; + private static Xex.Term Tnil = new Xex.Term ((Xex.Symbol) "nil"); private static Xex.Term Tcatch_tag = new Xex.Term ((Xex.Symbol) "@mimtag"); @@ -70,30 +79,8 @@ namespace M17N.Input internal static MInputMethod im_global = null; - // Sub classes - private class Exception : System.Exception - { - bool error; - - public Exception (string msg) : base (msg) - { - error = true; - } - - public Exception (string fmt, params object[] args) - : base (String.Format (fmt, args)) - { - error = true; - } - - public Exception (string msg, bool error) : base (msg) - { - this.error = error; - } - } - [FlagsAttribute] - private enum LoadStatus + protected enum LoadStatus { None = 0x00, Header = 0x01, @@ -103,6 +90,23 @@ namespace M17N.Input }; [FlagsAttribute] + public enum ChangedStatus + { + None = 0x00, + StateTitle = 0x01, + PreeditText = 0x02, + CursorPos = 0x04, + CandidateList = 0x08, + CandidateIndex = 0x10, + CandidateShow = 0x20, + Preedit = PreeditText | CursorPos, + Candidate = CandidateList | CandidateIndex | CandidateShow, + } + + private static ChangedStatus CandidateAll = (ChangedStatus.CandidateList + | ChangedStatus.CandidateIndex + | ChangedStatus.CandidateShow); + [FlagsAttribute] public enum KeyModifier { None = 0x00000000, @@ -132,6 +136,7 @@ namespace M17N.Input = new Dictionary (); private static uint keysym_base = 0x200000; private static uint char_mask = ~((uint) KeyModifier.All); + public static Key Reload; static Key () { @@ -154,6 +159,8 @@ namespace M17N.Input keymodifiers["altgr"] = KeyModifier.AltGr; keymodifiers["super"] = KeyModifier.Super; keymodifiers["hyper"] = KeyModifier.Hyper; + Reload = new Key (keysym_base); + keysyms["-reload"] = keysym_base++; } private static uint decode_keysym (MSymbol keysym) @@ -188,10 +195,8 @@ namespace M17N.Input return c | (uint) modifiers; } - public Key (uint c) - { - key = c; - } + public Key (uint c) { key = c; } + public Key (int c) { key = (uint) c; } public Key (uint c, KeyModifier modifiers) { @@ -269,6 +274,20 @@ namespace M17N.Input get { return ((key & (uint) KeyModifier.All) != 0); } } + public static bool operator== (Key k1, Key k2) + { + return k1.key == k2.key; + } + + public static bool operator!= (Key k1, Key k2) + { + return k1.key != k2.key; + } + + public override bool Equals (object o) { return key == ((Key) o).key; } + + public override int GetHashCode () { return (int) key; } + public bool Match (Key k) { if (k.key == key) @@ -289,31 +308,47 @@ namespace M17N.Input && ((m1 & KeyModifier.High) == (m2 & KeyModifier.High))); } + public int ToChar () + { + return (int) (key & 0x1FFFFF); + } + public override string ToString () { - string str = Char.ToString ((char) key); + int c = ToChar (); + MText mt = null; + if (c < 0x20) + foreach (KeyValuePair kv in keysyms) + if ((uint) c == kv.Value) + { + mt = kv.Key; + break; + } + if (mt == null) + mt = new MText (c); + KeyModifier m = ((KeyModifier) key) & KeyModifier.All; if (m != KeyModifier.None) { if ((m & KeyModifier.Shift) != KeyModifier.None) - str = "S-" + str; + mt.Ins (0, "S-"); if ((m & KeyModifier.Control) != KeyModifier.None) - str = "C-" + str; + mt.Ins (0, "C-"); if ((m & KeyModifier.Alt) != KeyModifier.None) - str = "A-" + str; + mt.Ins (0, "A-"); if ((m & KeyModifier.AltGr) != KeyModifier.None) - str = "G-" + str; + mt.Ins (0, "G-"); if ((m & KeyModifier.Super) != KeyModifier.None) - str = "s-" + str; + mt.Ins (0, "s-"); if ((m & KeyModifier.Hyper) != KeyModifier.None) - str = "H-" + str; + mt.Ins (0, "H-"); } - return str; + return (string) mt; } } - public class KeySeq : Xex.TermValue + internal class KeySeq : Xex.TermValue { public List keyseq = new List (); @@ -347,173 +382,55 @@ namespace M17N.Input keyseq.Add (new Key ((uint) mt[i])); } - private static uint parse_integer (string str) - { - if (Char.IsDigit (str[0])) - { - if (str[0] == '0' && str.Length > 2 && str[1] == 'x') - { - uint i = 0; - for (int idx = 2; idx < str.Length; idx++) - { - uint c = str[idx]; - if (c >= '0' && c <= '9') - i = i * 16 + (c - '0'); - else if (c >= 'A' && c <= 'F') - i = i * 16 + 10 + (c - 'A'); - else if (c >= 'a' && c <= 'f') - i = i * 16 + 10 + (c - 'a'); - else - break; - } - return i; - } - return UInt32.Parse (str); - } - else if (str[0] == '?') - return str[1]; - return 0; - } - - public KeySeq (XmlNode node) + public KeySeq (List list) { - XmlAttributeCollection acol = node.Attributes; - XmlNode n; + int len = list.Count; - if (acol != null && (n = acol["keys"]) != null) + for (int i = 0; i < len; i++) { - foreach (char c in n.Value) - keyseq.Add (new Key ((uint) c)); - } - - for (node = node.FirstChild; node != null; node = node.NextSibling) - { - if (node.Name == "key-event") - keyseq.Add (new Key ((MSymbol) node.InnerText)); + if (list[i].IsInt) + keyseq.Add (new Key (list[i].Intval)); + else if (list[i].IsStr) + keyseq.Add (new Key (list[i].Strval)); + else if (list[i].IsSymbol) + keyseq.Add (new Key ((string) list[i].Symval)); else - keyseq.Add (new Key (parse_integer (node.InnerText))); + throw new Exception ("Invalid key: " + list[i]); } } - public KeySeq (Xex.Term[] args) + public static Xex.TermValue parser (Xex.Domain domain, XmlNode node) { - foreach (Xex.Term term in args) - { - if (term.IsSymbol) - keyseq.Add (new Key ((MSymbol) ((string) term.Symval))); - else - keyseq.Add (new Key (term.Strval)); - } + Xex.Term term = new Xex.Term (domain, node.FirstChild).Eval (domain); + return (term.IsStr ? new KeySeq ((MText) term.Strval) + : new KeySeq (term.Listval)); } public override string ToString () { - string str; - + MText mt; foreach (Key key in keyseq) - if (key.HasModifier) + if (key.HasModifier || key.ToChar () < 0x20) { - str = "(keyseq"; + mt = "("; foreach (Key k in keyseq) - str += " " + k.ToString (); - return str + ")"; - } - str = "\""; - foreach (Key key in keyseq) - str += key.ToString (); - return str + "\""; - } - } - - public class Variable - { - public MSymbol name; - public MText description; - public Type type; - public object value; - public object[] candidates; - - public Variable (MPlist p) - { - name = p.Symbol; - p = p.Next; - description = parse_description (p); - if (description == null) - description = new MText ("No description"); - else - p = p.next; - type = (p.IsMText ? typeof (MText) - : p.IsInteger ? typeof (int) - : p.IsSymbol ? typeof (MSymbol) - : typeof (object)); - value = p.val; - p = p.next; - candidates = new object[p.Count]; - for (int i = 0; ! p.IsEmpty; i++, p = p.next) - candidates[i] = p.val; - } - - private static Type parse_value (XmlNode node, out object value) - { - string typename = node.Attributes["type"].Value; - Type type; - - if (typename == "integer") - { - int i; - if (! Int32.TryParse (node.InnerText, out i)) - i = 0; - value = i; - type = typeof (int); - } - else if (typename == "string") - { - MText mt = node.InnerText; - value = mt; - type = typeof (MText); - } - else if (typename == "symbol") - { - MSymbol sym = node.InnerText; - value = sym; - type = typeof (MSymbol); - } - else - { - value = null; - type = typeof (object); - } - return type; - } - - public Variable (XmlNode node) - { - name = node.Attributes["id"].Value; - for (node = node.FirstChild; node != null; node = node.NextSibling) - if (node.NodeType == XmlNodeType.Element) - { - if (node.Name == "description") - description = parse_description (node); - else if (node.Name == "value") - type = parse_value (node, out value); - else if (node.Name == "valiable-value-candidate") { - XmlNodeList n_list = node.ChildNodes; - candidates = new object[n_list.Count]; - for (int i = 0; i < n_list.Count; i++) - { - object val; - parse_value (n_list[i], out val); - candidates[i] = val; - } + if (mt.Length > 1) + mt.Cat (' '); + mt.Cat (k.ToString ()); } + return (string) mt.Cat (")"); } - } + mt = "\""; + foreach (Key k in keyseq) + { + int c = k.ToChar (); - public override string ToString () - { - return ("(" + name + " \"" + (string) description - + "\" " + type + " " + value + " " + candidates + ")"); + if (c == '\\' || c == '"') + mt.Cat ('\\'); + mt.Cat (c); + } + return (string) mt.Cat ("\""); } } @@ -521,7 +438,7 @@ namespace M17N.Input { public MSymbol name; public MText description; - public List keys; + internal List keys; public Command (MPlist p) { @@ -542,14 +459,14 @@ namespace M17N.Input public Command (XmlNode node) { - name = node.Attributes["id"].Value; + name = node.Attributes[0].Value; keys = new List (); for (node = node.FirstChild; node != null; node = node.NextSibling) { if (node.Name == "description") description = parse_description (node); else if (node.Name == "keyseq") - keys.Add (new KeySeq (node)); + keys.Add ((KeySeq) KeySeq.parser (null, node)); } } @@ -625,41 +542,62 @@ namespace M17N.Input internal abstract class Marker : Xex.TermValue { - MSymbol name; + private MSymbol name; - public Marker (MSymbol name) + private Marker (MSymbol name) { this.name = name; } - public abstract int Position (MInputContext ic); - public abstract void Mark (MInputContext ic); + public abstract int Position (Context ic); - public class Named : Marker - { - int pos; + public virtual void Mark (Context ic) + { + throw new Exception ("Can't set predefined marker: " + name); + } + public virtual int CharAt (Context ic) + { + return ic.preedit[Position (ic)]; + } - public Named (MSymbol name) : this (name, 0) { } + public override string ToString () + { + return "" + name.Name + ""; + } - private Named (MSymbol name, int p) : base (name) { pos = p; } + public static Xex.TermValue parser (Xex.Domain domain, XmlNode node) + { + return Get ((MSymbol) node.InnerText); + } - public override int Position (MInputContext ic) { return pos; } + public class Named : Marker + { + public Named (MSymbol name) : base (name) { } - public override void Mark (MInputContext ic) { pos = ic.cursor_pos; } + public override int Position (Context ic) + { + MPlist p = ic.marker_positions.Find (name); + return (p == null ? 0 : p.Integer); + } - public override Xex.TermValue Clone () + public override void Mark (Context ic) { - return new Named (name, pos); + ic.marker_positions.Put (name, ic.cursor_pos); } } public class Predefined : Marker { - public Predefined (MSymbol name) : base (name) { } + char tag; + + public Predefined (MSymbol name) : base (name) + { + tag = ((string) name)[1]; + } - public override int Position (MInputContext ic) + public override int Position (Context ic) { - switch (name.Name[1]) { + switch (tag) { case '<': return 0; case '>': return ic.preedit.Length; case '-': return ic.cursor_pos - 1; @@ -669,8 +607,7 @@ namespace M17N.Input { int pos = ic.cursor_pos; int to; - ic.preedit.FindProp (MInputMethod.Mcandidates, pos - 1, - out pos, out to); + ic.preedit.FindProp (Mcandidates, pos - 1, out pos, out to); return pos; } return 0; @@ -679,151 +616,606 @@ namespace M17N.Input { int pos = ic.cursor_pos; int from; - ic.preedit.FindProp (MInputMethod.Mcandidates, pos, - out from, out pos); + ic.preedit.FindProp (Mcandidates, pos, out from, out pos); return pos; } return ic.preedit.Length; default: - return name.Name[1] - '0'; + return tag - '0'; } } - - public override void Mark (MInputContext ic) + } + + public class PredefinedAbsolute : Marker + { + private int pos; + + public PredefinedAbsolute (MSymbol name) : base (name) + { + if (! int.TryParse (((string) name).Substring (1), out pos)) + throw new Exception ("Invalid marker name: " + name); + } + + public override int Position (Context ic) { - throw new Exception ("Can't set predefined marker: " + name); + return (pos < ic.preedit.Length ? pos : ic.preedit.Length); } + } - public override Xex.TermValue Clone () + public class PredefinedSurround : Marker + { + private int distance; + + public PredefinedSurround (MSymbol name) : base (name) + { + if (! int.TryParse (((string) name).Substring (2), out distance)) + throw new Exception ("Invalid marker name: " + name); + if (distance > 0) + distance--; + } + + public override int Position (Context ic) { - return new Predefined (name); + return ic.cursor_pos + distance; } + + public override int CharAt (Context ic) + { + int pos = ic.cursor_pos + distance; + if (pos < 0) + return ic.GetSurroundingChar (pos); + else if (pos >= ic.preedit.Length) + return ic.GetSurroundingChar (pos - ic.preedit.Length); + return ic.preedit[pos]; + } } static internal Dictionary predefined_markers; static Marker () { - predefined_markers = new Dictionary (); - MSymbol[] symlist = new MSymbol[] {"@<", "@>", "@-", "@+", "@[", "@]", - "@0", "@1", "@2", "@3", "@4", - "@5", "@6", "@7", "@8", "@9" }; + predefined_markers = new Dictionary (); + MSymbol[] symlist = new MSymbol[] {"@<", "@>", "@-", "@+", "@[", "@]" }; foreach (MSymbol s in symlist) predefined_markers[s] = new Predefined (s); } - public static Marker Get (MInputContext ic, MSymbol name) + public static Marker Get (MSymbol name) { - Predefined pred; - Marker m; - - if (predefined_markers.TryGetValue (name, out pred)) - return pred; - if (name.Name[0] == '@') - throw new Exception ("Invalid marker name: " + name); - m = (Marker) ic.markers.Get (name); - if (m == null) + string str = name.Name; + if (str[0] == '@') { - m = new Named (name); - ic.markers.Put (name, m); + Predefined pred; + if (predefined_markers.TryGetValue (name, out pred)) + return pred; + if (str.Length == 1) + throw new Exception ("Invalid marker name: " + name); + if (Char.IsDigit (str[1])) + return new PredefinedAbsolute (name); + if (str.Length == 2 || name == Mat_minus_zero + || ! (str[1] == '-' || str[1] == '+')) + throw new Exception ("Invalid marker name: " + name); + return new PredefinedSurround (name); } - return m; + return new Named (name); } } - internal class Map + internal class Candidates { - public MSymbol name; - public Dictionary submaps; - public Xex.Term actions; - - public void Add (KeySeq keys, int index, Xex.Term actions) + private class Block { - Map sub = null; + public int Index; + public object Data; - if (submaps == null) - submaps = new Dictionary (); - else - submaps.TryGetValue (keys.keyseq[index], out sub); - if (sub == null) - { - Key key = keys.keyseq[index]; - submaps[key] = sub = new Map (); + public Block (int index, Xex.Term term) + { + Index = index; + if (term.IsStr) + Data = (MText) term.Strval; + else + { + MPlist plist = new MPlist (); + MPlist p = plist; + foreach (Xex.Term t in term.Listval) + p = p.Add (MSymbol.mtext, (MText) t.Strval); + Data = plist; + } + } + + public Block (int index, MPlist plist) + { + Index = index; + if (plist.IsMText) + Data = plist.Text; + else if (plist.IsPlist) + Data = plist.Plist; + else + throw new Exception ("Invalid candidate: " + plist); + } + + public int Count + { + get { return (Data is MText + ? ((MText) Data).Length + : ((MPlist) Data).Count); } + } + + public object this[int i] + { + get { + if (Data is MText) return ((MText) Data)[i]; + return ((MPlist) Data)[i]; } - if (index + 1 < keys.keyseq.Count) - sub.Add (keys, index + 1, actions); - else - this.actions = actions; + } } - public Xex.Term Lookup (KeySeq keys, int index) - { - Map sub; + private Block[] blocks; + private int row = 0; + private int index = 0; + public object[] group; - if (index + 1 == keys.keyseq.Count) - return actions; - if (submaps.TryGetValue (keys.keyseq[index], out sub)) - return sub.Lookup (keys, index + 1); - return Tnil; + private bool IsFixed { get { return group != null; } } + private int Total { + get { + Block last = blocks[blocks.Length - 1]; + return last.Index + last.Count; } } - private void describe (MText mt, KeySeq keyseq) + public int Column { + get { return (IsFixed ? index % group.Length + : index - blocks[row].Index); } + } + + public object Group { + get { return (IsFixed ? group : blocks[row].Data); } + } + + public int GroupLength { - if (keyseq.keyseq.Count > 0) - { - mt.Cat (" (").Cat (keyseq.ToString ()); - mt.Cat (' ').Cat (actions.ToString ()); - mt.Cat (')'); - } - if (submaps != null) - foreach (KeyValuePair kv in submaps) + get { + if (IsFixed) { - keyseq.keyseq.Add (kv.Key); - kv.Value.describe (mt, keyseq); - keyseq.keyseq.RemoveAt (keyseq.keyseq.Count - 1); + int nitems = group.Length; + int start = index - (index % nitems); + int total = Total; + return (start + nitems <= total ? nitems : total - start); } + return blocks[row].Count; + } } - public override string ToString () - { - MText mt = "(" + name.Name; - KeySeq keyseq = new KeySeq (); - - describe (mt, keyseq); - mt.Cat (')'); - return (string) mt; + public object Current { + get { + return (IsFixed ? group[index % group.Length] + : blocks[row][index - blocks[row].Index]); + } } - } - - internal class State - { - public MSymbol name; - public MText title; - public MPlist branches = new MPlist (); - public State (MSymbol name) + public Candidates (MPlist list, int column) { - this.name = name; + int nblocks = list.Count; + + blocks = new Block[nblocks]; + for (int i = 0, start = 0; i < nblocks; i++, list = list.next) + start += (blocks[i] = new Block (index, list)).Count; + if (column > 0) + group = new object[column]; } - public override string ToString () + public Candidates (Xex.Term[] candidates, int column) { - MText mt = "(" + name.Name; + int nblocks = candidates.Length; - if (title != null) - mt.Cat (" \"" + title + "\""); - for (MPlist p = branches; ! p.IsEmpty; p = p.next) - mt.Cat (" (" + p.Key + " " + (Xex) p.Val + ")"); - return (string) mt + ")"; + blocks = new Block[nblocks]; + for (int i = 0, start = 0; i < nblocks; i++) + start += (blocks[i] = new Block (index, candidates[i])).Count; + if (column > 0) + group = new object[column]; } - } - - // Instance members - internal Xex.Domain domain; - private LoadStatus load_status = LoadStatus.None; - private MDatabase.Tag tag; - private MDatabase mdb; + public static void Detach (Context ic) + { + ic.preedit.PopProp (0, ic.preedit.Length, Mcandidates); + ic.candidates = null; + ic.changed |= (ChangedStatus.Preedit | ChangedStatus.CursorPos + | CandidateAll); + } + + // Fill the array "group" by candidates stating from INDEX. + // INDEX must be a multiple of "column". Set NTIMES to the + // number of valid candidates in "group". Update "block" if + // necessary. Return "group". + + private int fill_group (int start) + { + int nitems = group.Length; + int r = row; + Block b = blocks[r]; + + if (start < b.Index) + while (start < b.Index) + b = blocks[--r]; + else + while (start >= b.Index + b.Count) + b = blocks[++r]; + row = r; + + int count = b.Count; + start -= b.Index; + for (int i = 0; i < nitems; i++, start++) + { + if (start >= count) + { + r++; + if (r == blocks.Length) + return i; + b = blocks[r]; + count = b.Count; + start = 0; + } + group[i] = b[start]; + } + return nitems; + } + + // Update "row" to what contains the first candidate of + // the previous candidate-group, update "current_index", and + // update "group" if necessary. Return the previous + // candidate-group. Set NITEMS to the number of valid + // candidates contained in that group. + + public int PrevGroup () + { + int nitems; + int col = Column; + + if (IsFixed) + { + nitems = group.Length; + if ((index -= col + nitems) < 0) + index = (Total / nitems) * nitems; + nitems = fill_group (index); + } + else + { + row = row > 0 ? row-- : blocks.Length - 1; + nitems = blocks[row].Count; + index = blocks[row].Index; + } + index += col < nitems ? col : nitems - 1; + return nitems; + } + + public int NextGroup () + { + int nitems; + int col = Column; + + if (IsFixed) + { + nitems = group.Length; + if ((index += nitems - col) >= Total) + index = 0; + nitems = fill_group (index); + } + else + { + row = row < blocks.Length - 1 ? row + 1 : 0; + nitems = blocks[row].Count; + index = blocks[row].Count; + } + index += col < nitems ? col : nitems - 1; + return nitems; + } + + public void Prev () + { + int col = Column; + + if (col == 0) + { + int nitems = PrevGroup (); + index += col < nitems - 1 ? col : nitems - 1; + } + else + index--; + } + + public void Next () + { + int col = Column; + int nitems = GroupLength; + + if (col == nitems - 1) + { + nitems = NextGroup (); + index -= Column; + } + else + index++; + } + + public void First () + { + index -= Column; + } + + public void Last () + { + index += GroupLength - (Column + 1); + } + + public void Select (int col) + { + int maxcol = GroupLength - 1; + if (col > maxcol) + col = maxcol; + index = index - Column + col; + } + } + + internal class Selector : Xex.TermValue + { + static new Dictionary selectors; + + static Selector () + { + selectors = new Dictionary (); + MSymbol[] symlist = new MSymbol[] { "@<", "@=", "@>", "@-", "@+", + "@[", "@]" }; + foreach (MSymbol s in symlist) + selectors[s] = new Selector (s); + selectors["@first"] = new Selector ('<'); + selectors["@current"] = new Selector ('='); + selectors["@last"] = new Selector ('>'); + selectors["@previous"] = new Selector ('-'); + selectors["@next"] = new Selector ('+'); + selectors["@previous-candidate-change"] = new Selector ('['); + selectors["@next-candidate-change"] = new Selector (']'); + } + + private char tag; + + private Selector (MSymbol sym) { tag = sym.Name[1]; } + + private Selector (char tag) { this.tag = tag; } + + public static Xex.TermValue parser (Xex.Domain domain, XmlNode node) + { + return Get ((MSymbol) node.InnerText); + } + + public static Xex.TermValue Get (MSymbol name) + { + Selector selector; + if (! selectors.TryGetValue (name, out selector)) + throw new Exception ("Invalid selector name: " + name); + return selector; + } + + public void Select (Candidates candidates) + { + switch (tag) + { + case '<': candidates.First (); break; + case '>': candidates.Last (); break; + case '-': candidates.Prev (); break; + case '+': candidates.Next (); break; + case '[': candidates.PrevGroup (); break; + case ']': candidates.NextGroup (); break; + default: break; + } + } + } + + internal class Map + { + public MSymbol name; + public List entries = new List (); + + public Map (MSymbol name) { this.name = name; } + + public class Entry + { + public KeySeq keyseq; + public Xex.Term[] actions; + + public Entry (Xex.Domain domain, KeySeq keyseq, Xex.Term[] actions) + { + this.keyseq = keyseq; + this.actions = actions; + } + } + + public override string ToString () + { + string str = "(" + name; + foreach (Entry e in entries) + str += " " + e.keyseq.ToString (); + return str + ")"; + } + } + + internal class Keymap + { + public Dictionary submaps; + public Xex.Term[] map_actions, branch_actions; + + public Keymap () { } + + public void Add (KeySeq keys, int index, + Xex.Term[] map_actions, Xex.Term[] branch_actions) + { + if (index == keys.keyseq.Count) + { + this.map_actions = map_actions; + this.branch_actions = branch_actions; + } + else + { + Key key = keys.keyseq[index]; + Keymap sub = null; + + if (submaps == null) + submaps = new Dictionary (); + else + submaps.TryGetValue (key, out sub); + if (sub == null) + submaps[key] = sub = new Keymap (); + sub.Add (keys, index + 1, map_actions, branch_actions); + } + } + + public void AddMap (Map map, Xex.Term[] branch_actions) + { + foreach (Map.Entry entry in map.entries) + Add (entry.keyseq, 0, entry.actions, branch_actions); + } + + public Keymap Lookup (KeySeq keys, ref int index) + { + Keymap sub; + + if (index < keys.keyseq.Count + && submaps != null + && submaps.TryGetValue (keys.keyseq[index], out sub)) + { + index++; + return sub.Lookup (keys, ref index); + } + return this; + } + + private void describe (MText mt, KeySeq keyseq) + { + if (map_actions != null || branch_actions != null) + { + if (mt.Length > 0) + mt.Cat (" "); + mt.Cat ('(').Cat (keyseq.ToString ()); + if (map_actions != null) + foreach (Xex.Term term in map_actions) + mt.Cat (' ').Cat (term.ToString ()); + if (branch_actions != null) + foreach (Xex.Term term in branch_actions) + mt.Cat (' ').Cat (term.ToString ()); + mt.Cat (')'); + } + if (submaps != null) + foreach (KeyValuePair kv in submaps) + { + keyseq.keyseq.Add (kv.Key); + kv.Value.describe (mt, keyseq); + keyseq.keyseq.RemoveAt (keyseq.keyseq.Count - 1); + } + } + + public override string ToString () + { + MText mt = ""; + KeySeq keyseq = new KeySeq (); + + describe (mt, keyseq); + return (string) mt; + } + } + + internal class State + { + public Xex.Symbol name; + public MText title; + public Xex.Term[] enter_actions, fallback_actions; + public Keymap keymap = new Keymap (); + + public State (Xex.Symbol name, MText title) + { + this.name = name; + this.title = title; + } + + public State (MInputMethod im, XmlNode node) + { + this.name = node.Attributes[Qsname].Value; + XmlAttribute attr = node.Attributes[Qtitle]; + if (attr != null) + title = (MText) attr.Value; + else + title = im.title; + keymap = new Keymap (); + for (node = node.FirstChild; node != null; node = node.NextSibling) + { + if (node.Name == Qstate_hook) + enter_actions = Xex.ParseTerms (im.domain, node.FirstChild); + else if (node.Name == Qcatch_all_branch) + fallback_actions = Xex.ParseTerms (im.domain, node.FirstChild); + else if (node.Name == Qbranch) + { + MSymbol mapname = node.Attributes[Qmname].Value; + Map map; + if (im.maps.TryGetValue (mapname, out map)) + keymap.AddMap (map, Xex.ParseTerms (im.domain, + node.FirstChild)); + else + throw new Exception ("Unknown map: " + mapname); + } + } + } + + public State (MInputMethod im, MPlist plist) + { + if (! plist.IsSymbol) + throw new Exception ("Invalid state: " + plist); + this.name = plist.Symbol.Name; + plist = plist.next; + if (plist.IsMText) + { + title = plist.Text; + plist = plist.next; + } + else + title = im.title; + keymap = new Keymap (); + for (; ! plist.IsEmpty; plist = plist.next) + { + if (! plist.IsPlist) + throw new Exception ("Invalid branch: " + plist); + MPlist p = plist.Plist; + if (! p.IsSymbol) + throw new Exception ("Invalid branch: " + p); + MSymbol mapname = p.Symbol; + if (mapname == MSymbol.t) + enter_actions = im.parse_actions (p.next, false); + else if (mapname == MSymbol.nil) + fallback_actions = im.parse_actions (p.next, false); + else + { + Map map; + if (im.maps.TryGetValue (mapname, out map)) + keymap.AddMap (map, im.parse_actions (p.next, false)); + else + throw new Exception ("Unknown map: " + mapname); + } + } + } + + public override string ToString () + { + MText mt = "(" + name; + + if (title != null) + mt.Cat (" \"" + title + "\""); + mt.Cat (keymap.ToString ()); + return (string) mt + ")"; + } + } + + // Instance members + internal Xex.Domain domain; + + protected LoadStatus load_status = LoadStatus.None; + protected MDatabase.Tag tag; + private MDatabase mdb; private MText description; internal MText title; @@ -831,43 +1223,47 @@ namespace M17N.Input internal Xex.Symbol[] var_names; internal Dictionary plugins; internal Dictionary maps; - internal MPlist states; + internal Dictionary states; + internal State initial_state; static MInputMethod () { - im_domain.DefSubr (Finsert, "insert", true, 1, 1); - im_domain.DefSubr (Finsert_candidates, "candidates", true, 1, -1); - im_domain.DefSubr (Fdelete, "delete", true, 1, 1); - im_domain.DefSubr (Fselect, "select", true, 1, 1); - im_domain.DefSubr (Fshow, "show", true, 0, 0); - im_domain.DefSubr (Fhide, "hide", true, 0, 0); - im_domain.DefSubr (Fmove, "move", true, 1, 1); - im_domain.DefSubr (Fmark, "mark", true, 1, 1); - im_domain.DefSubr (Fpushback, "pushback", true, 1, 1); - im_domain.DefSubr (Fpop, "pop", true, 0, 0); - im_domain.DefSubr (Fundo, "undo", true, 0, 1); - im_domain.DefSubr (Fcommit, "commit", true, 0, 0); - im_domain.DefSubr (Funhandle, "unhandle", true, 0, 0); - im_domain.DefSubr (Fshift, "shift", true, 1, 1); - im_domain.DefSubr (Fmarker, "marker", true, 1, 1); - im_domain.DefSubr (Fchar_at, "char-at", true, 1, 1); - im_domain.DefSubr (Fkeyseq, "keyseq", true, 1, -1); + im_domain.DefTerm ("keyseq", KeySeq.parser); + im_domain.DefTerm ("marker", Marker.parser); + im_domain.DefTerm ("selector", Selector.parser); + + im_domain.DefSubr (Finsert, "insert", false, 1, 1); + im_domain.DefSubr (Finsert_candidates, "insert-candidates", false, 1, -1); + im_domain.DefSubr (Fdelete, "delete", false, 1, 1); + im_domain.DefSubr (Fselect, "select", false, 1, 1); + im_domain.DefSubr (Fshow, "show", false, 0, 0); + im_domain.DefSubr (Fhide, "hide", false, 0, 0); + im_domain.DefSubr (Fmove, "move", false, 1, 1); + im_domain.DefSubr (Fmark, "mark", false, 1, 1); + im_domain.DefSubr (Fpushback, "pushback", false, 1, 1); + im_domain.DefSubr (Fpop, "pop", false, 0, 0); + im_domain.DefSubr (Fundo, "undo", false, 0, 1); + im_domain.DefSubr (Fcommit, "commit", false, 0, 0); + im_domain.DefSubr (Funhandle, "unhandle", false, 0, 0); + im_domain.DefSubr (Fshift, "shift", false, 1, 1); + im_domain.DefSubr (Fshiftback, "shiftback", false, 0, 0); + im_domain.DefSubr (Fchar_at, "char-at", false, 1, 1); + im_domain.DefSubr (Fkey_count, "key-count", false, 1, 1); + im_domain.DefSubr (Fsurrounding_flag, "surrounding-text-flag", + false, 0, 0); MDatabase.Tag tag = new MDatabase.Tag (Minput_method, "*", "*", "*"); List list = MDatabase.List (tag); M17n.DebugPrint ("Found {0} input methods\n", list.Count); foreach (MDatabase mdb in list) - { - im_table[mdb.tag] = new MInputMethod (mdb.tag); - } - tag = new MDatabase.Tag (Minput_method, MSymbol.t, MSymbol.nil, "global"); - im_global = im_table[tag]; + im_table[mdb.tag] = new MInputMethod (mdb.tag); } // Constructor private MInputMethod (MDatabase.Tag tag) { this.tag = tag; + domain = new Xex.Domain (tag[1].Name, im_domain, null); } // Instance Properties @@ -919,7 +1315,7 @@ namespace M17N.Input return (im_table.TryGetValue (tag, out im) ? im : null); } - public bool Open () + private bool Open () { return ((load_status == LoadStatus.Full) || load_body ()); } @@ -939,6 +1335,7 @@ namespace M17N.Input mdb = MDatabase.Find (tag); if (mdb == null) return false; + mdb.name_table = Xex.Symbol.Table; try { MSymbol format = mdb.Format; @@ -960,10 +1357,10 @@ namespace M17N.Input private bool load_body () { - domain = new Xex.Domain (im_domain, null); mdb = MDatabase.Find (tag); if (mdb == null) return false; + mdb.name_table = Xex.Symbol.Table; try { object obj = mdb.Load (); if (obj is MPlist) @@ -979,10 +1376,19 @@ namespace M17N.Input return true; } + private void add_default_state () + { + Xex.Symbol Qinit = "init"; + State state = new State (Qinit, title); + foreach (KeyValuePairkv in maps) + state.keymap.AddMap (kv.Value, null); + states[Qinit] = initial_state = state; + } + private void load (MPlist plist, bool full) { maps = new Dictionary (); - states = new MPlist (); + states = new Dictionary (); for (; ! plist.IsEmpty; plist = plist.next) if (plist.IsPlist) @@ -1027,14 +1433,8 @@ namespace M17N.Input commands = new Command[0]; if (! full) return; - if (states.IsEmpty) - { - State state = new State ((MSymbol) "init"); - plist = new MPlist (); - foreach (KeyValuePairkv in maps) - state.branches.Add (kv.Key, null); - states.Add (state.name, state); - } + if (states.Count == 0) + add_default_state (); } private void load (XmlNode node, bool full) @@ -1042,7 +1442,7 @@ namespace M17N.Input bool skip_header = load_status == LoadStatus.Header; maps = new Dictionary (); - states = new MPlist (); + states = new Dictionary (); if (node.NodeType == XmlNodeType.Document) node = node.FirstChild; @@ -1083,133 +1483,8 @@ namespace M17N.Input commands = new Command[0]; if (! full) return; - if (states.IsEmpty) - { - State state = new State ((MSymbol) "init"); - foreach (KeyValuePairkv in maps) - state.branches.Add (kv.Key, null); - states.Add (state.name, state); - } - } - - private static void transform (MPlist plist) - { - for (; ! plist.IsEmpty; plist = plist.next) - { - if (plist.IsMText) - { - MPlist p = new MPlist (); - p.Add (MSymbol.symbol, Minsert); - p.Add (MSymbol.mtext, plist.Text); - plist.Set (MSymbol.plist, p); - } - else if (plist.IsInteger) - { - MPlist p = new MPlist (); - p.Add (MSymbol.symbol, Minsert); - p.Add (MSymbol.integer, plist.Integer); - plist.Set (MSymbol.plist, p); - } - else if (plist.IsPlist) - { - MPlist pl = plist.Plist; - - if (pl.IsSymbol) - { - if (pl.Symbol == Madd) - pl.Set (MSymbol.symbol, (MSymbol) "+="); - else if (pl.Symbol == Msub) - pl.Set (MSymbol.symbol, (MSymbol) "-="); - else if (pl.Symbol == Mmul) - pl.Set (MSymbol.symbol, (MSymbol) "*="); - else if (pl.Symbol == Mdiv) - pl.Set (MSymbol.symbol, (MSymbol) "/="); - else if (pl.Symbol == Minsert) - { - // (insert (CANDIDATES ...)) - // => (candidates CANDIDATES ...) - if (pl.next.IsPlist) - { - pl.Set (MSymbol.symbol, Mcandidates); - pl = pl.next; - MPlist p = pl.Plist; - pl.Set (p.key, p.val); - for (p = p.next; ! p.IsEmpty; p = p.next); - pl.Add (p.key, p.val); - } - } - else if (pl.Symbol == Mif) - { - pl = pl.next; - if (! pl.IsEmpty) - transform (pl.next); - } - else if (pl.Symbol == Mcond) - { - for (pl = pl.next; ! pl.IsEmpty; pl = pl.next) - if (pl.IsPlist) - { - MPlist p = pl.Plist; - - if (p.IsPlist) - transform (p); - else - transform (p.next); - } - } - else if (pl.Symbol == Mdelete - || pl.Symbol == Mmove - || pl.Symbol == Mmark) - { - pl = pl.next; - if (pl.IsSymbol) - { - MSymbol sym = pl.Symbol; - MPlist p = new MPlist (); - p.Add (MSymbol.symbol, Mmarker); - p.Add (MSymbol.symbol, sym); - pl.Set (MSymbol.plist, p); - } - } - else if (pl.Symbol == Mpushback) - { - pl = pl.next; - if (pl.IsPlist) - pl.Plist.Push (MSymbol.symbol, Mkeyseq); - } - } - else if (pl.IsMText) - { - // (CANDIDATES ...) => (candidates CANDIDATES ...) - pl.Push (MSymbol.symbol, Mcandidates); - } - } - else if (plist.IsSymbol) - { - MSymbol sym = plist.Symbol; - - if (sym.Name.Length >= 3 - && sym.Name[0] == '@' - && (sym.Name[1] == '-' || sym.Name[1] == '+')) - { - int pos = int.Parse (sym.Name.Substring (1)); - MPlist p = new MPlist (); - - if (pos == 0) - { - p.Add (MSymbol.symbol, Msurrounding_text_p); - } - else - { - if (sym.Name[1] == '+') - pos--; - p.Add (MSymbol.symbol, Mchar_at); - p.Add (MSymbol.integer, pos); - } - plist.Set (MSymbol.plist, p); - } - } - } + if (states.Count == 0) + add_default_state (); } private static MText parse_description (MPlist plist) @@ -1247,8 +1522,9 @@ namespace M17N.Input range = null; else { - range = new int[pl.Count * 2]; - for (int i = 0; i < range.Length; i++) + int nrange = pl.Count; + range = new int[nrange * 2]; + for (int i = 0; i < nrange; i++) { if (pl.IsPlist) { @@ -1266,7 +1542,7 @@ namespace M17N.Input } } if (vari == null) - domain.Defvar (new Xex.Variable.Int (name, desc, val, range)); + domain.Defvar (new Xex.Variable.Int (domain, name, desc, val, range)); else { Xex.Term term = new Xex.Term (val); @@ -1295,7 +1571,7 @@ namespace M17N.Input } } if (vari == null) - domain.Defvar (new Xex.Variable.Str (name, desc, (string) val, range)); + domain.Defvar (new Xex.Variable.Str (domain, name, desc, (string) val, range)); else { Xex.Term term = new Xex.Term ((string) val); @@ -1325,7 +1601,7 @@ namespace M17N.Input } } if (vari == null) - domain.Defvar (new Xex.Variable.Sym (name, desc, sym, range)); + domain.Defvar (new Xex.Variable.Sym (domain, name, desc, sym, range)); else { Xex.Term term = new Xex.Term (sym); @@ -1335,6 +1611,19 @@ namespace M17N.Input } } + private Xex.Variable get_global_var (Xex.Symbol name) + { + if (im_global == null || this != im_global) + { + tag = new MDatabase.Tag (Minput_method, MSymbol.t, MSymbol.nil, + "global"); + im_global = im_table[tag]; + if (! im_global.Open ()) + throw new Exception ("Failed to load global"); + } + return im_global.domain.GetVar (name, false); + } + private void parse_variables (MPlist plist) { var_names = new Xex.Symbol[plist.Count]; @@ -1349,8 +1638,7 @@ namespace M17N.Input var_names[i] = name; p = p.next; string desc = (string) parse_description (p); - Xex.Variable vari - = im_global != null ? im_global.domain.GetVar (name, false) : null; + Xex.Variable vari = get_global_var (name); if (vari != null) domain.Defvar (vari); if (desc != null) @@ -1377,13 +1665,10 @@ namespace M17N.Input for (int i = 0; i < node_list.Count; i++) { Xex.Symbol name = node_list[i].Attributes[0].Value; - Xex.Variable vari = im_global.domain.GetVar (name, false); - + Xex.Variable vari = get_global_var (name); if (vari != null) domain.Defvar (vari); - else - domain.Defvar (node_list[i]); - + domain.Defvar (node_list[i]); var_names[i] = name; } } @@ -1455,10 +1740,47 @@ namespace M17N.Input private void parse_maps (XmlNode node) { + for (node = node.FirstChild; node != null; node = node.NextSibling) + if (node.Name == Qmap) + { + MSymbol name = node.Attributes[0].Value; + Map map = new Map (name); + maps[name] = map; + for (XmlNode nd = node.FirstChild; nd != null; nd = nd.NextSibling) + if (nd.Name == Qrule) + { + XmlNode n = nd.FirstChild; + if (n.Name != Qkeyseq) + continue; + KeySeq keyseq = (KeySeq) KeySeq.parser (domain, n); + Xex.Term[] actions = Xex.ParseTerms (domain, n.NextSibling); + map.entries.Add (new Map.Entry (domain, keyseq, actions)); + } + } + } + + private void parse_states (MPlist plist) + { + for (; ! plist.IsEmpty; plist = plist.next) + if (plist.IsPlist) + { + State state = new State (this, plist.Plist); + states[state.name] = state; + if (initial_state == null) + initial_state = state; + } } private void parse_states (XmlNode node) { + for (node = node.FirstChild; node != null; node = node.NextSibling) + if (node.Name == Qstate) + { + State state = new State (this, node); + states[state.name] = state; + if (initial_state == null) + initial_state = state; + } } private void parse_include (MPlist plist) @@ -1519,14 +1841,15 @@ namespace M17N.Input { if (target_name == MSymbol.nil) { - for (p = im.states; ! p.IsEmpty; p = p.next) - states.Add (p.key, p.val); + foreach (KeyValuePair kv in im.states) + states[kv.Key] = kv.Value; } else { - object state = im.states.Get (target_name); - if (state != null) - states.Add (target_name, state); + Xex.Symbol state_name = target_name.Name; + State state; + if (im.states.TryGetValue (state_name, out state)) + states[state_name] = state; } } } @@ -1537,56 +1860,173 @@ namespace M17N.Input for (int i = 0; ! plist.IsEmpty; i++, plist = plist.next) { - if (! plist.IsPlist) - throw new Exception ("Invalid cond args: " + plist); - MPlist p = plist.Plist; - List arg = new List (parse_action (p)); - args[i] = new Xex.Term (arg); + if (! plist.IsPlist) + throw new Exception ("Invalid cond args: " + plist); + MPlist p = plist.Plist; + List arg = new List (); + arg.Add (parse_action (p, true)); + for (p = p.next; ! p.IsEmpty; p = p.next) + arg.Add (parse_action (p, false)); + args[i] = new Xex.Term (arg); + } + return new Xex.Term (domain, Qcond, args); + } + + private Xex.Term parse_insert (MPlist plist) + { + Xex.Term[] args; + Xex.Term arg; + if (plist.IsSymbol) + arg = new Xex.Term (domain, (Xex.Symbol) plist.Symbol.Name); + else if (plist.IsMText) + arg = new Xex.Term ((string) plist.Text); + else if (plist.IsInteger) + arg = new Xex.Term (plist.Integer); + else if (plist.IsPlist) + { + MPlist pl = plist.Plist; + + args = new Xex.Term[pl.Count]; + int i; + for (i = 0; ! pl.IsEmpty; i++, pl = pl.next) + { + if (pl.IsMText) + args[i] = new Xex.Term ((string) pl.Text); + else if (pl.IsPlist) + { + List list = new List (); + for (MPlist p = pl.Plist; ! p.IsEmpty; p = p.next) + { + if (p.IsMText) + list.Add (new Xex.Term ((string) p.Text)); + else + throw new Exception ("Invalid candidates: " + p); + } + } + else + throw new Exception ("Invalid candidates: " + pl); + } + return new Xex.Term (domain, Qinsert_candidates, args); + } + else + throw new Exception ("Invalid arg to insert: " + plist); + args = new Xex.Term[1]; + args[0] = arg; + return new Xex.Term (domain, Qinsert, args); + } + + private Xex.Term parse_select (MPlist plist) + { + Xex.Term[] args = new Xex.Term[1]; + if (plist.IsInteger) + args[0] = new Xex.Term (plist.Integer); + else if (! plist.IsSymbol) + throw new Exception ("Invalid arg to select: " + plist); + else if (plist.Symbol.Name[0] == '@') + args[0] = new Xex.Term (Selector.Get (plist.Symbol)); + else + args[0] = new Xex.Term (domain, (Xex.Symbol) plist.Symbol.Name); + return new Xex.Term (domain, Qselect, args); + } + + private Xex.Term parse_funcall_with_marker (MPlist plist, Xex.Symbol func) + { + Xex.Term[] args = new Xex.Term[1]; + if (plist.IsInteger && func != Qmark) + args[0] = new Xex.Term (plist.Integer); + else if (plist.IsSymbol) + args[0] = new Xex.Term (Marker.Get (plist.Symbol)); + else + throw new Exception ("Invalid arg to " + func + ": " + plist); + return new Xex.Term (domain, func, args); + } + + private Xex.Term parse_char_at (MSymbol name) + { + Xex.Term[] args = new Xex.Term[1]; + args[0] = new Xex.Term (Marker.Get (name)); + return new Xex.Term (domain, Qchar_at, args); + } + + private Xex.Term parse_shift (MPlist plist) + { + Xex.Term[] args = new Xex.Term[1]; + if (! plist.IsSymbol) + throw new Exception ("Invalid arg to shift: " + plist); + args[0] = new Xex.Term ((Xex.Symbol) plist.Symbol.Name); + return new Xex.Term (domain, Qshift, args); + } + + private Xex.Term parse_action (MPlist plist, bool as_funarg) + { + if (plist.IsPlist) + { + MPlist p = plist.Plist; + + if (p.IsMText || p.IsPlist) + return parse_insert (plist); + if (! p.IsSymbol) + throw new Exception ("Invalid action: " + p); + MSymbol sym = p.Symbol; + Xex.Symbol name = sym.Name; + p = p.next; + if (name == Qcond) + return parse_cond (p); + if (name == Qinsert) + return parse_insert (p); + if (name == Qselect) + return parse_select (p); + if (name == Qdelete || name == Qmove || name == Qmark) + return parse_funcall_with_marker (p, name); + if (name == Qshift) + return parse_shift (p); + if (((string) name)[0] == '@') + return parse_char_at (sym); + if (name == Qset || name == Qadd || name == Qsub + || name == Qmul || name == Qdiv) + { + if (! p.IsSymbol) + throw new Exception ("Invalid action: " + p); + Xex.Symbol varname = p.Symbol.Name; + Xex.Term[] args = new Xex.Term[1]; + args[0] = parse_action (p.next, true); + return new Xex.Term (domain, name, varname, args); + } + else + { + if (name == Qeq) + name = Qeqeq; + if (p.IsEmpty) + return new Xex.Term (domain, name, null); + else + return new Xex.Term (domain, name, parse_actions (p, true)); + } + } + else if (plist.IsSymbol) + { + if (plist.Symbol.Name[0] == '@') + return parse_char_at (plist.Symbol); + return new Xex.Term (domain, (Xex.Symbol) plist.Symbol.Name); } - return new Xex.Term (domain, (Xex.Symbol) Mcond.Name, args); + else if (plist.IsMText) + return (as_funarg ? new Xex.Term ((string) plist.Text) + : parse_insert (plist)); + else if (plist.IsInteger) + return (as_funarg ? new Xex.Term (plist.Integer) + : parse_insert (plist)); + else + throw new Exception ("Invalid action: " + plist); } - private Xex.Term[] parse_action (MPlist plist) + private Xex.Term[] parse_actions (MPlist plist, bool as_funarg) { Xex.Term[] terms = new Xex.Term[plist.Count]; for (int i = 0; ! plist.IsEmpty; i++, plist = plist.next) - { - if (plist.IsSymbol) - terms[i] = new Xex.Term ((Xex.Symbol) plist.Symbol.Name); - else if (plist.IsMText) - terms[i] = new Xex.Term ((string) plist.Text); - else if (plist.IsInteger) - terms[i] = new Xex.Term (plist.Integer); - else if (plist.IsPlist) - { - MPlist p = plist.Plist; - if (! p.IsSymbol) - throw new Exception ("Invalid action: " + p); - MSymbol name = p.Symbol; - p = p.next; - if (name == Mcond) - terms[i] = parse_cond (p); - else if (name == Mset || name == Madd || name == Msub - || name == Mmul || name == Mdiv) - { - if (! p.IsSymbol) - throw new Exception ("Invalid action: " + p); - Xex.Symbol varname = p.Symbol.Name; - terms[i] = new Xex.Term (domain, (Xex.Symbol) name.Name, - varname, parse_action (p.next)); - } - else - terms[i] = new Xex.Term (domain, (Xex.Symbol) name.Name, - parse_action (p)); - } - else - throw new Exception ("Invalid action: " + plist); - } + terms[i] = parse_action (plist, as_funarg); return terms; } - private void parse_macros (MPlist plist) { for (MPlist pl = plist; ! pl.IsEmpty; pl = pl.next) @@ -1605,9 +2045,8 @@ namespace M17N.Input if (! p.IsSymbol) continue; - transform (p.next); domain.Defun ((Xex.Symbol) p.Symbol.Name, false, null, - parse_action (p.next), false); + parse_actions (p.next, false), false); } } @@ -1620,9 +2059,8 @@ namespace M17N.Input if (! pl.IsSymbol) continue; - Map map = new Map (); - map.name = pl.Symbol; - maps[map.name] = map; + Map map = new Map (pl.Symbol); + maps[pl.Symbol] = map; for (pl = pl.next; ! pl.IsEmpty; pl = pl.next) { if (! pl.IsPlist) @@ -1636,46 +2074,9 @@ namespace M17N.Input else continue; p = p.next; - if (p.IsEmpty) - continue; - map.Add (keys, 0, - new Xex.Term (domain, Nprogn, parse_action (p))); - } - } - } - - private void parse_states (MPlist plist) - { - for (; ! plist.IsEmpty; plist = plist.next) - if (plist.IsPlist) - { - MPlist pl = plist.Plist; - MText title = null; - - if (pl.IsMText) - { - title = pl.Text; - pl = pl.next; - } - if (! pl.IsSymbol) - continue; - - State state = new State (pl.Symbol); - state.title = title; - if (states == null) - states = new MPlist (); - states.Add (state.name, state); - for (pl = pl.next; ! pl.IsEmpty; pl = pl.next) - { - if (! pl.IsPlist) - continue; - MPlist p = pl.Plist; - if (! p.IsSymbol) - continue; - MSymbol map_name = p.Symbol; - p = p.next; - Xex.Term term = new Xex.Term (domain, Nprogn, parse_action (p)); - state.branches.Add (map_name, term); + Xex.Term[] actions + = p.IsEmpty ? null : parse_actions (p, false); + map.entries.Add (new Map.Entry (domain, keys, actions)); } } } @@ -1683,7 +2084,10 @@ namespace M17N.Input private static Xex.Term Finsert (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - ((MInputContext) domain.context).insert (args[0]); + if (args[0].IsInt) + ((Context) domain.context).insert (args[0].Intval); + else + ((Context) domain.context).insert (args[0].Strval); return args[0]; } @@ -1691,68 +2095,75 @@ namespace M17N.Input Xex.Variable vari, Xex.Term[] args) { - ((MInputContext) domain.context).insert_candidates (args[0]); - return args[0]; - } + Context ic = (Context) domain.context; + Xex.Variable v = ic.domain.GetVar (Qcandidates_group_size, false); + int column = (v == null ? 0 : v.Value.Intval); - private static Xex.Term Fmarker (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) - { - MSymbol name = (string) args[0].Symval; - return new Xex.Term (Marker.Get ((MInputContext) domain.context, name)); + ic.insert_candidates (new Candidates (args, column)); + return args[0]; } private static Xex.Term Fchar_at (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - int c = ((MInputContext) domain.context).char_at (args[0].Intval); - return new Xex.Term (c); + Context ic = (Context) domain.context; + Marker m = (Marker) args[0].Objval; + + return new Xex.Term (m.CharAt (ic)); } private static Xex.Term Fdelete (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) + Xex.Term[] args) { - ((MInputContext) domain.context).delete ((int) args[0].Intval); - return args[0]; + Context ic = (Context) domain.context; + int pos; + + if (args[0].IsInt) + pos = args[0].Intval; + else + { + Marker m = (Marker) args[0].Objval; + pos = m.Position (ic); + } + return new Xex.Term (ic.delete (pos)); } private static Xex.Term Fselect (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) + Xex.Term[] args) { - MInputContext ic = (MInputContext) domain.context; + Candidates can = ((Context) domain.context).candidates; - if (args[0].IsInt) - ic.select (args[0].Intval); - else - ic.select ((MSymbol) ((string) args[0].Symval)); + if (can != null) + { + if (args[0].IsInt) + can.Select (args[0].Intval); + else + ((Selector) args[0].Objval).Select (can); + } return args[0]; } private static Xex.Term Fshow (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) + Xex.Term[] args) { - ((MInputContext) domain.context).show (); + ((Context) domain.context).show (); return Tnil; } private static Xex.Term Fhide (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) + Xex.Term[] args) { - ((MInputContext) domain.context).hide (); + ((Context) domain.context).hide (); return Tnil; } private static Xex.Term Fmove (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) + Xex.Term[] args) { - if (args[0].IsInt) - ((MInputContext) domain.context).move (args[0].Intval); - else - { - Marker m = (Marker) args[0].Objval; - MInputContext ic = (MInputContext) domain.context; - ((MInputContext) domain.context).move (m.Position (ic)); - } + Context ic = (Context) domain.context; + int pos = (args[0].IsInt ? args[0].Intval + : ((Marker) args[0].Objval).Position (ic)); + ic.move (pos); return args[0]; } @@ -1760,20 +2171,14 @@ namespace M17N.Input Xex.Term[] args) { Marker m = (Marker) args[0].Objval; - m.Mark ((MInputContext) domain.context); + m.Mark ((Context) domain.context); return args[0]; } - private static Xex.Term Fkeyseq (Xex.Domain domain, Xex.Variable vari, - Xex.Term[] args) - { - return new Xex.Term (new KeySeq (args)); - } - private static Xex.Term Fpushback (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - MInputContext ic = (MInputContext) domain.context; + Context ic = (Context) domain.context; if (args[0].IsInt) ic.pushback (args[0].Intval); @@ -1787,7 +2192,7 @@ namespace M17N.Input private static Xex.Term Fpop (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - ((MInputContext) domain.context).pop (); + ((Context) domain.context).pop (); return Tnil; } @@ -1795,21 +2200,21 @@ namespace M17N.Input Xex.Term[] args) { int n = args.Length == 0 ? -2 : args[0].Intval; - ((MInputContext) domain.context).undo (n); + ((Context) domain.context).undo (n); return Tnil; } private static Xex.Term Fcommit (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - ((MInputContext) domain.context).commit (); + ((Context) domain.context).commit (); return Tnil; } private static Xex.Term Funhandle (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - ((MInputContext) domain.context).commit (); + ((Context) domain.context).commit (); args = new Xex.Term[2]; args[0] = args[1] = Tcatch_tag; return Xex.Fthrow (domain, vari, args); @@ -1818,12 +2223,38 @@ namespace M17N.Input private static Xex.Term Fshift (Xex.Domain domain, Xex.Variable vari, Xex.Term[] args) { - ((MInputContext) domain.context).shift (args[0].Symval); + Context ic = (Context) domain.context; + State state; + if (ic.im.states.TryGetValue (args[0].Symval, out state)) + ((Context) domain.context).shift (state); + else + throw new Exception ("Unknown state: " + args[0].Symval); return args[0]; } + private static Xex.Term Fshiftback (Xex.Domain domain, Xex.Variable vari, + Xex.Term[] args) + { + ((Context) domain.context).shift (null); + return Tnil; + } + + private static Xex.Term Fkey_count (Xex.Domain domain, Xex.Variable vari, + Xex.Term[] args) + { + return new Xex.Term (((Context) domain.context).key_head); + } + + private static Xex.Term Fsurrounding_flag (Xex.Domain domain, + Xex.Variable vari, + Xex.Term[] args) + { + return new Xex.Term (GetSurroundingText == null ? 0 : 1); + } + public override string ToString () { + this.Open (); string str = (String.Format ("({0} (title \"{1}\")", tag, title)); if (commands != null) { @@ -1850,691 +2281,553 @@ namespace M17N.Input foreach (KeyValuePair kv in maps) str += " " + kv.Value; str += ") (states"; - foreach (MPlist p in states) - str += " " + p.val; + foreach (KeyValuePair kv in states) + { + str += " (" + kv.Key + " " + kv.Value.keymap + ")"; + } return str + "))"; } - } - public class MInputContext - { - internal static Xex.Symbol Ncandidates_group_size = "candidates-group-size"; - private static MSymbol Mat_less_than = "@<"; - private static MSymbol Mat_greater_than = "@>"; - private static MSymbol Mat_minus = "@-"; - private static MSymbol Mat_plus = "@+"; - private static MSymbol Mat_open_square_bracket = "@["; - private static MSymbol Mat_close_square_bracket = "@]"; - - public MInputMethod im; - private MText produced; - private bool active; - private MText status; - private bool status_changed; - internal MText preedit; - private bool preedit_changed; - internal int cursor_pos; - private bool cursor_pos_changed; - private Candidates candidates; - private MPlist candidate_group; - private int candidate_index; - private int candidate_from, candidate_to; - private bool candidate_show; - private bool candidate_changed; - - private Stack states; - internal MInputMethod.KeySeq keys; - private int key_head; - private int state_key_head; - private object state_var_values; - private int commit_key_head; - private MText state_preedit; - private int state_pos; - internal MPlist markers = new MPlist (); - internal MText preceding_text = new MText (); - internal MText following_text = new MText (); - private bool key_unhandled; + public class Context + { + internal MInputMethod im; + internal Xex.Domain domain; + private bool active; - internal Xex.Domain domain; + private MText status; + private MText produced = new MText (); + internal MText preedit = new MText (); + internal int cursor_pos; + internal MPlist marker_positions = new MPlist (); - public MInputContext (MInputMethod im) - { - this.im = im; - domain = new Xex.Domain (im.domain, this); - states = new Stack (); - states.Push ((MInputMethod.State) im.states.val); - keys = new MInputMethod.KeySeq (); - } + internal Candidates candidates; + private int candidate_from, candidate_to; + private bool candidate_show; + public bool CandidateShow { get { return candidate_show; } } - private void adjust_markers (int from, int to, object inserted) - { - int ins = (inserted == null ? 0 - : inserted is int ? 1 - : ((MText) inserted).Length); - int diff = ins - (to - from); + private State state, prev_state; + private MText state_preedit = new MText (); + private int state_key_head; + private object state_var_values, state_initial_var_values; + private int state_pos; - for (MPlist plist = markers; ! plist.IsEmpty; plist = plist.next) - { - int pos = plist.Integer; - if (pos > from) - { - if (pos >= to) - plist.val = pos + diff; - else - plist.val = from; - } - } - if (cursor_pos >= to) - cursor_pos += diff; - else if (cursor_pos > from) - cursor_pos = from; - } + private Keymap keymap; + // Sequence of input keys. + internal KeySeq keys = new KeySeq (); + // Index into KEYS specifying the next key to handle. + internal int key_head; - private void preedit_replace (int from, int to, int c) - { - preedit.Del (from, to); - preedit.Ins (from, c); - adjust_markers (from, to, c); - } + internal MText preceding_text = new MText (); + internal MText following_text = new MText (); - private void preedit_replace (int from, int to, MText mt) - { - preedit[from, to] = mt; - adjust_markers (from, to, mt); - } + // Set to false before calling the method 'handle_key', and set + // to true when some key is unhandled. + private bool key_unhandled; - internal void insert (Xex.Term arg) - { - if (arg.IsInt) - preedit_replace (cursor_pos, cursor_pos, arg.Intval); - else - preedit_replace (cursor_pos, cursor_pos, new MText (arg.Strval)); - preedit_changed = true; - cursor_pos_changed = true; - } + // The unhandled key. It has the meaning only when + // 'key_unhandled' is true. + private Key unhandled_key; - private class Candidates - { - private class Block + internal ChangedStatus changed; + + private void set_cursor (string prefix, int pos) { - public int Index; - public object Data; + cursor_pos = pos; + } - public Block (int index, Xex.Term term) - { - Index = index; - if (term.IsStr) - Data = (MText) term.Strval; - else - { - MPlist plist = new MPlist (); - MPlist p = plist; - foreach (Xex.Term t in term.Listval) - p = p.Add (MSymbol.mtext, (MText) t.Strval); - Data = plist; - } - } + internal void reset () + { + status = im.initial_state.title; + produced.Del (); + preedit.Del (); - public Block (int index, MPlist plist) - { - Index = index; - if (plist.IsMText) - Data = plist.Text; - else if (plist.IsPlist) - Data = plist.Plist; - else - throw new Exception ("Invalid candidate: " + plist); - } + set_cursor ("reset", 0); + marker_positions.Clear (); + candidates = null; + candidate_show = false; - public int Count - { - get { return (Data is MText - ? ((MText) Data).Length - : ((MPlist) Data).Count); } - } + state = prev_state = null; + state_preedit.Del (); + state_var_values = state_initial_var_values; + state_pos = 0; + shift (im.initial_state); - public object this[int i] - { - get { - if (Data is MText) return ((MText) Data)[i]; - return ((MPlist) Data)[i]; - } - } + preceding_text.Del (); + following_text.Del (); + + changed = ChangedStatus.None; } - private Block[] blocks; - private int row = 0; - private int index = 0; - public object[] group; + static Xex.Term[] catch_args = new Xex.Term[2]; - private bool IsFixed { get { return group != null; } } - private int Total { - get { - Block last = blocks[blocks.Length - 1]; - return last.Index + last.Count; } + private bool take_actions (Xex.Term[] actions) + { + catch_args[0] = Tcatch_tag; + catch_args[1]= new Xex.Term (domain, Qprogn, actions); + Xex.Term term = new Xex.Term (domain, Qcatch, catch_args); + term = term.Eval (domain); + return (! term.IsSymbol || term.Symval != Tcatch_tag.Symval); } - public int Column { - get { return (IsFixed ? index % group.Length - : index - blocks[row].Index); } - } + static MPlist callback_arg = new MPlist (); - public object Group { - get { return (IsFixed ? group : blocks[row].Data); } + private bool get_surrounding_text (int len) + { + if (len < 0 ? -len <= preceding_text.Length + : len <= following_text.Length) + return true; + if (GetSurroundingText == null) + return false; + callback_arg.Set (MSymbol.integer, len); + if (! GetSurroundingText (this, callback_arg) + || ! callback_arg.IsMText) + return false; + if (len < 0) + { + preceding_text = callback_arg.Text; + return (-len <= preceding_text.Length); + } + following_text = callback_arg.Text; + return (len <= following_text.Length); } - public int GroupLength + internal int GetSurroundingChar (int pos) { - get { - if (IsFixed) - { - int nitems = group.Length; - int start = index - (index % nitems); - int total = Total; - return (start + nitems <= total ? nitems : total - start); - } - return blocks[row].Count; - } - } + if (! get_surrounding_text (pos < 0 ? pos : pos + 1)) + return 0; + if (pos < 0) + return preceding_text[preceding_text.Length + pos]; + return following_text[pos]; + } + + private void adjust_markers (int from, int to, object inserted) + { + int ins = (inserted == null ? 0 + : inserted is int ? 1 + : ((MText) inserted).Length); + int diff = ins - (to - from); - public object Current { - get { - return (IsFixed ? group[index % group.Length] - : blocks[row][index - blocks[row].Index]); - } + for (MPlist p = marker_positions; ! p.IsEmpty; p = p.next) + { + int pos = p.Integer; + if (pos > from) + p.Set (p.Key, pos >= to ? pos + diff : from); + } + if (cursor_pos >= to) + set_cursor ("adjust", cursor_pos + diff); + else if (cursor_pos > from) + set_cursor ("adjust", from); } - public Candidates (MPlist list, int column) + private void preedit_replace (int from, int to, int c) { - int nblocks = list.Count; - - blocks = new Block[nblocks]; - for (int i = 0, start = 0; i < nblocks; i++, list = list.next) - start += (blocks[i] = new Block (index, list)).Count; - if (column > 0) - group = new object[column]; + preedit.Del (from, to); + preedit.Ins (from, c); + adjust_markers (from, to, c); } - public Candidates (List list, int column) + private void preedit_replace (int from, int to, MText mt) { - int nblocks = list.Count; - - blocks = new Block[nblocks]; - for (int i = 0, start = 0; i < nblocks; i++) - start += (blocks[i] = new Block (index, list[i])).Count; - if (column > 0) - group = new object[column]; + preedit[from, to] = mt; + adjust_markers (from, to, mt); } - public static void Detach (MInputContext ic) + internal void insert (int c) { - ic.preedit.PopProp (0, ic.preedit.Length, MInputMethod.Mcandidates); - ic.candidates = null; - ic.preedit_changed = true; - ic.cursor_pos_changed = true; - ic.candidate_changed = true; + preedit_replace (cursor_pos, cursor_pos, c); + changed |= ChangedStatus.Preedit | ChangedStatus.CursorPos; } - // Fill the array "group" by candidates stating from INDEX. - // INDEX must be a multiple of "column". Set NTIMES to the - // number of valid candidates in "group". Update "block" if - // necessary. Return "group". - - private int fill_group (int start) + internal void insert (string str) { - int nitems = group.Length; - int r = row; - Block b = blocks[r]; - - if (start < b.Index) - while (start < b.Index) - b = blocks[--r]; - else - while (start >= b.Index + b.Count) - b = blocks[++r]; - row = r; - - int count = b.Count; - start -= b.Index; - for (int i = 0; i < nitems; i++, start++) - { - if (start >= count) - { - r++; - if (r == blocks.Length) - return i; - b = blocks[r]; - count = b.Count; - start = 0; - } - group[i] = b[start]; - } - return nitems; + preedit_replace (cursor_pos, cursor_pos, (MText) str); + changed |= ChangedStatus.Preedit | ChangedStatus.CursorPos; } - // Update "row" to what contains the first candidate of - // the previous candidate-group, update "current_index", and - // update "group" if necessary. Return the previous - // candidate-group. Set NITEMS to the number of valid - // candidates contained in that group. - - public int PrevGroup () + private void update_candidate () { - int nitems; - int col = Column; + object candidate = candidates.Current; - if (IsFixed) + if (candidate is MText) { - nitems = group.Length; - if ((index -= col + nitems) < 0) - index = (Total / nitems) * nitems; - nitems = fill_group (index); + preedit_replace (candidate_from, candidate_to, (MText) candidate); + candidate_to = candidate_from + ((MText) candidate).Length; } else { - row = row > 0 ? row-- : blocks.Length - 1; - nitems = blocks[row].Count; - index = blocks[row].Index; + preedit_replace (candidate_from, candidate_to, (int) candidate); + candidate_to = candidate_from + 1; } - index += col < nitems ? col : nitems - 1; - return nitems; + preedit.PushProp (candidate_from, candidate_to, + Mcandidates, this); + set_cursor ("update-candidate", candidate_to); + changed |= (ChangedStatus.Preedit | ChangedStatus.CursorPos + | CandidateAll); } - public int NextGroup () + internal void insert_candidates (Candidates candidates) { - int nitems; - int col = Column; + this.candidates = candidates; + candidate_from = candidate_to = cursor_pos; + update_candidate (); + } - if (IsFixed) + internal void select (int n) + { + if (candidates != null) { - nitems = group.Length; - if ((index += nitems - col) >= Total) - index = 0; - nitems = fill_group (index); + candidates.Select (n); + update_candidate (); + } + } + + internal int delete (int pos) + { + int deleted = pos - cursor_pos; + + if (pos < cursor_pos) + { + if (pos < 0) + { + if (DeleteSurroundingText != null) + { + callback_arg.Set (MSymbol.integer, pos); + if (DeleteSurroundingText (this, callback_arg)) + { + if (callback_arg.IsInteger) + deleted = callback_arg.Integer - cursor_pos; + preceding_text.Del (); + } + else + deleted = - cursor_pos; + } + pos = 0; + } + if (pos < cursor_pos) + preedit_replace (pos, cursor_pos, null); } else { - row = row < blocks.Length - 1 ? row + 1 : 0; - nitems = blocks[row].Count; - index = blocks[row].Count; + if (pos > preedit.Length) + { + if (DeleteSurroundingText != null) + { + callback_arg.Set (MSymbol.integer, pos - preedit.Length); + if (DeleteSurroundingText (this, callback_arg)) + { + if (callback_arg.IsInteger) + deleted = callback_arg.Integer - cursor_pos; + preceding_text.Del (); + } + else + deleted = preedit.Length - cursor_pos; + } + pos = preedit.Length; + } + if (pos > cursor_pos) + preedit_replace (cursor_pos, pos, null); } - index += col < nitems ? col : nitems - 1; - return nitems; + if (deleted != 0) + changed |= ChangedStatus.Preedit | ChangedStatus.CursorPos; + return deleted; } - public void Prev () + internal void show () { - int col = Column; + candidate_show = true; + changed |= ChangedStatus.CandidateShow; + } - if (col == 0) + internal void hide () + { + candidate_show = false; + changed |= ChangedStatus.CandidateShow; + } + + internal void move (int pos) + { + if (pos < 0) + pos = 0; + else if (pos > preedit.Length) + pos = preedit.Length; + if (pos != cursor_pos) { - int nitems = PrevGroup (); - index += col < nitems - 1 ? col : nitems - 1; + set_cursor ("move", pos); + changed |= ChangedStatus.Preedit; } - else - index--; } - public void Next () + internal void pushback (int n) { - int col = Column; - int nitems = GroupLength; - - if (col == nitems - 1) + if (n > 0) { - nitems = NextGroup (); - index -= Column; + key_head -= n; + if (key_head < 0) + key_head = 0; } + else if (n == 0) + key_head = 0; else - index++; + { + key_head = - n; + if (key_head > keys.keyseq.Count) + key_head = keys.keyseq.Count; + } } - public void First () + internal void pushback (KeySeq keyseq) { - index -= Column; + if (key_head > 0) + key_head--; + if (key_head < keys.keyseq.Count) + keys.keyseq.RemoveRange (key_head, keys.keyseq.Count - key_head); + for (int i = 0; i < keyseq.keyseq.Count; i++) + keys.keyseq.Add (keyseq.keyseq[i]); } - public void Last () + internal void pop () { - index += GroupLength - (Column + 1); + if (key_head < keys.keyseq.Count) + keys.keyseq.RemoveRange (key_head, 1); } - public void Select (int col) + internal void undo (int n) { - int maxcol = GroupLength - 1; - if (col > maxcol) - col = maxcol; - index = index - Column + col; + if (n < 0) + keys.keyseq.RemoveRange (keys.keyseq.Count + n, - n); + else + keys.keyseq.RemoveRange (n, keys.keyseq.Count - n); + reset (); } - } - - private void update_candidate () - { - object candidate = candidates.Current; - if (candidate is MText) - { - preedit_replace (candidate_from, candidate_to, (MText) candidate); - candidate_to = candidate_from + ((MText) candidate).Length; - } - else - { - preedit_replace (candidate_from, candidate_to, (int) candidate); - candidate_to = candidate_from + 1; - } - preedit.PushProp (candidate_from, candidate_to, - MInputMethod.Mcandidates, this); - cursor_pos = candidate_from; - preedit_changed = true; - cursor_pos_changed = true; - candidate_changed = true; - } + internal void commit () + { + produced.Cat (preedit); + preedit_replace (0, preedit.Length, null); + changed |= ChangedStatus.Preedit; + } - internal void insert_candidates (Xex.Term arg) - { - int column = 0; - Xex.Variable v = domain.GetVar (Ncandidates_group_size, false); + internal void shift (State state) + { + if (state == null) + { + if (prev_state == null) + return; + state = prev_state; + } - if (v != null) - column = v.Value.Intval; - candidates = new Candidates (arg.Listval, column); - candidate_from = candidate_to = cursor_pos; - update_candidate (); - } + if (state == im.initial_state) + { + commit (); + keys.keyseq.RemoveRange (0, key_head); + key_head = 0; + if (state != this.state) + { + domain.RestoreValues (state_initial_var_values); + if (state.enter_actions != null) + take_actions (state.enter_actions); + } + prev_state = null; + } + else + { + if (state != this.state && state.enter_actions != null) + take_actions (state.enter_actions); + prev_state = this.state; + } + save_state (); + if (this.state == null || this.state.title != state.title) + this.changed |= ChangedStatus.StateTitle; + this.state = state; + keymap = state.keymap; + } - internal void select (int n) - { - if (candidates != null) - { - candidates.Select (n); - update_candidate (); - } - } + public Context (MInputMethod im) + { + if (im.load_status != LoadStatus.Full + && ! im.Open ()) + throw new Exception ("Openging " + im.tag + " failed"); + this.im = im; + domain = new Xex.Domain ("context", im.domain, this); + state_initial_var_values = domain.SaveValues (); + reset (); + active = true; + if (PreeditChanged != null) + { + callback_arg.Set (MSymbol.mtext, preedit); + PreeditChanged (this, callback_arg); + } + if (StatusChanged != null) + { + callback_arg.Set (MSymbol.mtext, status); + StatusChanged (this, callback_arg); + } + } - internal void select (MSymbol sym) - { - if (candidates != null) - { - if (sym == Mat_less_than) - candidates.First (); - else if (sym == Mat_greater_than) - candidates.Last (); - else if (sym == Mat_minus) - candidates.Prev (); - else if (sym == Mat_plus) - candidates.Next (); - else if (sym == Mat_open_square_bracket) - candidates.PrevGroup (); - else if (sym == Mat_close_square_bracket) - candidates.NextGroup (); - } - } + public ChangedStatus Changed { get { return changed; } } - internal int marker (MSymbol sym) - { - int pos = cursor_pos; + internal object GetCandidates (out int column) + { + column = 0; + if (cursor_pos == 0) + return null; + Candidates candidates + = (Candidates) preedit.GetProp (cursor_pos - 1, Mcandidates); + if (candidates == null) + return null; + column = candidates.Column; + return candidates.Current; + } - if (sym.Name.Length == 2 && sym.Name[0] == '@') - { - switch (sym.Name[0]) - { - case '<': pos = 0; break; - case '>': pos = preedit.Length; break; - case '-': pos = cursor_pos - 1; break; - case '+': pos = cursor_pos + 1; break; - case '[': - if (pos > 0) - { - int to; - preedit.FindProp (MInputMethod.Mcandidates, pos - 1, - out pos, out to); - } - else - pos = 0; - break; - case ']': - if (cursor_pos < preedit.Length - 1) - { - int from; - preedit.FindProp (MInputMethod.Mcandidates, pos, - out from, out pos); - } - else - pos = preedit.Length; - break; - default: - if (sym.Name[0] >= '0' && sym.Name[0] <= '9') - pos = sym.Name[0]; - break; - } - } - else if (sym.Name.Length >= 3 && sym.Name[0] == '@') - { - pos = int.Parse (sym.Name.Substring (2)); - } - else - { - object val = markers.Get (sym); + private void save_state () + { + state_var_values = domain.SaveValues (); + state_preedit.Del (); + state_preedit.Ins (0, preedit); + state_key_head = key_head; + state_pos = cursor_pos; + } - if (val is int) - pos = (int) val; - } - return pos; - } + private void restore_state () + { + domain.RestoreValues (state_var_values); + preedit.Del (); + preedit.Ins (0, state_preedit); + set_cursor ("restore", state_pos); + } - internal int char_at (int pos) - { - int c; + private bool handle_key () + { + Console.Write ("\nHandle ({0}[{1}]) in {2}", + keys, key_head, state.name); - pos += cursor_pos; - if (pos < 0) - { - if (preceding_text.Length < -pos) - { - MPlist plist = new MPlist (); - plist.Push (MSymbol.integer, pos); - if (MInputMethod.GetSurroundingText != null - && MInputMethod.GetSurroundingText (this, plist) - && plist.IsMText - && preceding_text.Length < plist.Text.Length) - preceding_text = plist.Text; - } - c = (-pos < preceding_text.Length - ? preceding_text[preceding_text.Length + pos] : -1); - } - else if (pos >= 0 && pos < preedit.Length) - c = preedit[pos]; - else - { - pos -= preedit.Length; - if (pos >= following_text.Length) - { - MPlist plist = new MPlist (); - plist.Push (MSymbol.integer, pos + 1); - if (MInputMethod.GetSurroundingText != null - && MInputMethod.GetSurroundingText (this, plist) - && plist.IsMText - && following_text.Length < plist.Text.Length) - following_text = plist.Text; - } - c = (pos < following_text.Length ? following_text[pos] : -1); - } - return c; - } + Keymap sub = keymap.Lookup (keys, ref key_head); - internal void delete (int pos) - { - if (pos < cursor_pos) - preedit_replace (pos, cursor_pos, null); - else - preedit_replace (cursor_pos, pos, null); - preedit_changed = true; - cursor_pos_changed = true; - } + if (sub != keymap) + { + restore_state (); + keymap = sub; + if (keymap.map_actions != null) + { + if (! take_actions (keymap.map_actions)) + return false; + } + else if (keymap.submaps != null) + { + for (int i = state_key_head; i < key_head; i++) + preedit_replace (cursor_pos, cursor_pos, + keys.keyseq[i].ToChar ()); + } + if (keymap.submaps == null) + { + if (keymap.branch_actions != null) + { + if (! take_actions (keymap.branch_actions)) + return false; + } + if (keymap != state.keymap) + shift (state); + } + } + else + { + State current_state = state; - internal void show () - { - candidate_show = true; - candidate_changed = true; - } + if (keymap.branch_actions != null) + { + if (! take_actions (keymap.branch_actions)) + return false; + } + if (state == current_state) + { + if (state == im.initial_state + && key_head < keys.keyseq.Count) + return false; + if (keymap != state.keymap) + shift (state); + else if (keymap.branch_actions == null) + shift (im.initial_state); + } + } + return true; + } - internal void hide () - { - candidate_show = false; - candidate_changed = true; - } + public bool Toggle () + { + active = ! active; + return active; + } - internal void move (int pos) - { - if (pos < 0) - pos = 0; - else if (pos > preedit.Length) - pos = preedit.Length; - if (pos != cursor_pos) - { - cursor_pos = pos; - preedit_changed = true; - } - } + public bool UnhandledKey (out Key key) + { + key = unhandled_key; + return key_unhandled; + } - internal void mark (MSymbol sym) - { - MPlist slot = markers.Find (sym); + public MText Preedit { get { return preedit; } } + public MText Produced { get { return produced; } } - if (slot == null) - markers.Push (sym, cursor_pos); - else - slot.val = cursor_pos; - } + // Return value: + // true: All keys are handled and there's no text to commit. + // false: Some key is left unhandled or there's a text to + // commit. The caller should refer to UnhandledKey and + // Produced. - internal void pushback (int n) - { - if (n > 0) - { - key_head -= n; - if (key_head < 0) - key_head = 0; - } - else if (n == 0) + public bool Filter (Key key) + { + if (! active) + { + key_unhandled = true; + unhandled_key = key; + return false; + } + if (key == Key.Reload) + return true; + changed = ChangedStatus.None; + produced.Del (); + preceding_text.Del (); + following_text.Del (); + + key_unhandled = false; + keys.keyseq.Add (key); + int count = 0; + while (key_head < keys.keyseq.Count) + { + if (! handle_key ()) + { + unhandled_key = keys.keyseq[key_head++]; + key_unhandled = true; + break; + } + if (++count == 10) + break; + } + keys.keyseq.RemoveRange (0, key_head); key_head = 0; - else - { - key_head = - n; - if (key_head > keys.keyseq.Count) - key_head = keys.keyseq.Count; - } - } - - internal void pushback (MInputMethod.KeySeq keyseq) - { - if (key_head > 0) - key_head--; - if (key_head < keys.keyseq.Count) - keys.keyseq.RemoveRange (key_head, keys.keyseq.Count - key_head); - for (int i = 0; i < keyseq.keyseq.Count; i++) - keys.keyseq.Add (keyseq.keyseq[i]); - } - - internal void pop () - { - if (key_head < keys.keyseq.Count) - keys.keyseq.RemoveRange (key_head, 1); - } - - internal void undo (int n) - { - if (n < 0) - keys.keyseq.RemoveRange (keys.keyseq.Count + n, - n); - else - keys.keyseq.RemoveRange (n, keys.keyseq.Count - n); - reset (); - } - - internal void commit () - { - produced.Cat (preedit); - preedit.Del (); - preedit_changed = true; - } - - internal void shift (MSymbol sym) - { - MInputMethod.State state; - - if (sym == MSymbol.t) - { - if (states.Count > 1) - state = states.Pop (); - else - state = states.Peek (); - } - else - { - state = (MInputMethod.State) im.states.Get (sym); - if (state == null) - throw new Exception ("Unknown state: " + state.name); - } - if (state == null) - state = states.Pop (); - if (state == (MInputMethod.State) im.states.val) - { - commit (); - reset (); - } - else - { - state_key_head = key_head; - state_pos = cursor_pos; - state_preedit = preedit.Dup (); - if (state != states.Peek ()) - { - states.Push (state); - state_var_values = domain.SaveValues (); - status = state.title; - if (status == null) - status = im.title; - status_changed = true; - Xex on_entry - = (Xex) state.branches.Get (MSymbol.t); - if (on_entry != null) - on_entry.Eval (domain); - } - } - } - - internal void reset () - { - preedit.Del (); - state_preedit.Del (); - produced.Del (); - markers.Clear (); - cursor_pos = 0; - key_head = commit_key_head = 0; - states.Clear (); - states.Push ((MInputMethod.State) im.states.Val); - state_key_head = 0; - state_pos = 0; - } - internal object GetCandidates (out int column) - { - column = 0; - if (cursor_pos == 0) - return null; - Candidates candidates - = (Candidates) preedit.GetProp (cursor_pos - 1, - MInputMethod.Mcandidates); - if (candidates == null) - return null; - column = candidates.Column; - return candidates.Current; - } + if ((changed & ChangedStatus.Preedit) != ChangedStatus.None + && PreeditChanged != null) + { + callback_arg.Set (MSymbol.mtext, preedit); + PreeditChanged (this, callback_arg); + } + if ((changed & ChangedStatus.StateTitle) != ChangedStatus.None + && StatusChanged != null) + { + callback_arg.Set (MSymbol.mtext, status); + StatusChanged (this, callback_arg); + } + if ((changed & ChangedStatus.Candidate) != ChangedStatus.None + && CandidateChanged != null) + { + CandidateChanged (this, callback_arg); + } - internal void HandleKey () - { - MInputMethod.State state = states.Peek (); + Console.Write ("\nPreedit(\"{0}\"/{1}), Produced({2})", + preedit, cursor_pos, produced); - + return (! key_unhandled && produced.Length == 0); + } } } }