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//
// StyleReader.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2013-2017 Jean-Philippe Bruyère
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text.RegularExpressions;
using Crow.Coding;
namespace Crow
{
/// <summary>
/// Parser for style files.
/// </summary>
//TODO: style key shared by different class may use only first encouneter class setter, which can cause bug.
public class StyleReader : StreamReader
{
enum States { init, classNames, members, value, endOfStatement }
States curState = States.init;
string resourceId;
int column = 1;
int line = 1;
#region Character ValidityCheck
static Regex rxValidChar = new Regex(@"\p{Lu}|\p{Ll}|\p{Lt}|\p{Lm}|\p{Lo}|\p{Nl}|\p{Mn}|\p{Mc}|\p{Nd}|\p{Pc}|\p{Cf}");
static Regex rxNameStartChar = new Regex(@"_|\p{Lu}|\p{Ll}|\p{Lt}|\p{Lm}|\p{Lo}");
static Regex rxNameChar = new Regex(@"\p{Lu}|\p{Ll}|\p{Lt}|\p{Lm}|\p{Lo}|\p{Nl}|\p{Mn}|\p{Mc}|\p{Nd}|\p{Pc}|\p{Cf}");
static Regex rxDecimal = new Regex(@"[0-9]+");
static Regex rxHexadecimal = new Regex(@"[0-9a-fA-F]+");
public bool nextCharIsValidCharStartName
{
get { return rxNameStartChar.IsMatch(new string(new char[]{PeekChar()})); }
}
public bool nextCharIsValidCharName
{
get { return rxNameChar.IsMatch(new string(new char[]{PeekChar()})); }
}
#endregion
char ReadChar () {
column++;
return (Char)Read();
}
char PeekChar () {
return (Char)Peek();
}
void SkipWhiteSpaceAndLineBreak (){
while (!EndOfStream){
if (!PeekChar ().IsWhiteSpaceOrNewLine ())
break;
if (ReadChar () == '\n') {
line++;
column = 0;
}
}
}
public StyleReader (Dictionary<string, Style> styling, Stream stream, string resId)
: base(stream)
{
resourceId = resId;
string styleKey = resId.Substring (0, resId.Length - 6);
string token = "";
List<string> targetsClasses = new List<string> ();
string currentProperty = "";
while (!EndOfStream) {
SkipWhiteSpaceAndLineBreak ();
if (EndOfStream)
break;
switch (Peek()) {
case '/':
ReadChar ();
if (PeekChar () != '/')
throw new ParserException (line, column, "Unexpected char '/'");
ReadLine ();
break;
case ',':
ReadChar ();
if (!(curState == States.init || curState == States.classNames) || string.IsNullOrEmpty (token))
throw new ParserException (line, column, "Unexpected char ','");
targetsClasses.Add (token);
token = "";
curState = States.classNames;
break;
case '{':
ReadChar ();
if (!(curState == States.init || curState == States.classNames) || string.IsNullOrEmpty (token))
throw new ParserException (line, column, "Unexpected char '{'");
targetsClasses.Add (token);
token = "";
curState = States.members;
break;
case '}':
ReadChar ();
if (curState != States.members)
throw new ParserException (line, column, "Unexpected char '}'");
curState = States.classNames;
targetsClasses.Clear ();
break;
case '=':
ReadChar ();
if (!(curState == States.init || curState == States.members))
throw new ParserException (line, column, "Unexpected char '='");
currentProperty = token;
token = "";
curState = States.value;
break;
case '"':
if (curState != States.value)
throw new ParserException (line, column, "Unexpected char '\"'");
ReadChar ();
while (!EndOfStream) {
char c = PeekChar();
if (c == '\"') {
ReadChar ();
break;
}
token += ReadChar();
if (c == '\\' && !EndOfStream)
token += ReadChar();
}
curState = States.endOfStatement;
break;
case ';':
if (curState != States.endOfStatement)
throw new ParserException (line, column, "Unexpected end of statement");
ReadChar ();
foreach (string tc in targetsClasses) {
if (!styling.ContainsKey (tc))
styling [tc] = new Style ();
else if (styling [tc].ContainsKey (currentProperty))
continue;
styling [tc] [currentProperty] = token;
System.Diagnostics.Debug.WriteLine ("Style: {0}.{1} = {2}", tc, currentProperty, token);
}
token = "";
curState = States.members;
break;
default:
if (curState == States.value)
throw new ParserException (line, column, "expecting value enclosed in '\"'");
if (curState == States.endOfStatement)
throw new ParserException (line, column, "expecting end of statement");
if (nextCharIsValidCharStartName) {
token += ReadChar();
while (nextCharIsValidCharName)
token += ReadChar();
}
break;
}
}
}
public override int Read ()
{
int tmp = base.Read ();
char c = (char)tmp;
if (c == '\n') {
line++;
column = 1;
} else if (c == '\t')
column += Interface.TabSize;
else if (c != '\r')
column++;
return tmp;
}
void throwParserException(string message){
throw new Exception (string.Format ("Style Reader Exception ({0},{1}): {2} in {3}.",
line, column, message, resourceId));
}
}
}
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