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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;
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 readerState { classNames, propertyName, expression }
readerState state = readerState.classNames;
string resourceId;
int column = 1;
int line = 1;
public StyleReader (Interface iface, 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 = "";
int curlyBracketCount = 0;
while (!EndOfStream) {
char c = (Char)Read ();
if (c == '/' && !EndOfStream) {
if ((char)Peek () == '/') {//process comment, skip until newline
ReadLine ();
continue;
}
}
switch (state) {
case readerState.classNames:
if (c.IsWhiteSpaceOrNewLine () || c == ',' || c == '{') {
if (!string.IsNullOrEmpty (token))
targetsClasses.Add (token);
if (c == '{')
state = readerState.propertyName;
token = "";
}else if (c=='='){
//this file contains only properties,
//resource Id (minus .style extention) will determine the single target class
if (targetsClasses.Count > 1)
throwParserException ("Unexpected token '='");
else if (targetsClasses.Count == 1) {
if (!string.IsNullOrEmpty (token))
throwParserException ("Unexpected token '='");
currentProperty = targetsClasses [0];
targetsClasses [0] = styleKey;
}else{
if (string.IsNullOrEmpty (token))
throwParserException ("Unexpected token '='");
targetsClasses.Add (styleKey);
currentProperty = token;
token = "";
}
state = readerState.expression;
}else
token += c;
break;
case readerState.propertyName:
if (c.IsWhiteSpaceOrNewLine () || c == '=') {
if (!string.IsNullOrEmpty (token))
currentProperty = token;
if (c == '=')
state = readerState.expression;
token = "";
}else if (c == '}'){
if (!string.IsNullOrEmpty (token))
throwParserException ("Unexpected token '" + c + "'");
targetsClasses = new List<string> ();
currentProperty = "";
state = readerState.classNames;
} else
token += c;
break;
case readerState.expression:
bool expressionIsFinished = false;
if (curlyBracketCount == 0) {
if (c == '{'){
if (!string.IsNullOrEmpty(token.Trim()))
throwParserException ("Unexpected token '{'");
curlyBracketCount++;
token = "{";
}else if (c == '}')
throwParserException ("Unexpected token '{'");
else if (c == ';') {
expressionIsFinished = true;
} else
token += c;
} else {
if (c == '{')
curlyBracketCount++;
else if (c == '}') {
curlyBracketCount--;
if (curlyBracketCount == 0)
expressionIsFinished = true;
}
token += c;
}
if (expressionIsFinished) {
if (!string.IsNullOrEmpty (token)) {
string expression = token.Trim ();
foreach (string tc in targetsClasses) {
if (!iface.Styling.ContainsKey (tc))
iface.Styling [tc] = new Style ();
else if (iface.Styling [tc].ContainsKey (currentProperty))
continue;
iface.Styling [tc] [currentProperty] = expression;
}
token = "";
}
//allow omiting ';' if curly bracket close expression
while (!EndOfStream) {
if (Char.IsWhiteSpace((char)Peek()))
Read();
else
break;
}
if (this.Peek () == ';')
this.Read ();
state = readerState.propertyName;
}
break;
}
}
if (curlyBracketCount > 0)
throwParserException ("Unexpected end of file");
}
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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