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/*
* Copyright (C) 2013 The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cyanogenmod.filemanager.ash;
import android.text.Spannable;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import java.io.File;
/**
* The base class for all the syntax highlight processors.</br>
*/
public abstract class SyntaxHighlightProcessor {
protected final ISyntaxHighlightResourcesResolver mResourcesResolver;
/**
* Constructor of <code>SyntaxHighlightProcessor</code>
*
* @param resolver A class for resolve resources
*/
public SyntaxHighlightProcessor(ISyntaxHighlightResourcesResolver resolver) {
super();
this.mResourcesResolver = resolver;
}
/**
* Method that request to the syntax highlight processor if it is able to parse
* the file
*
* @param file The file to check
* @return boolean If the syntax highlight processor accepts process the file
*/
protected abstract boolean accept(File file);
/**
* Method that initializes the processor
*/
public abstract void initialize();
/**
* Method that request to the syntax highlight processor to do process and highlight a
* document. This method request a full process.
*
* @param spanable The spannable source to highlight
*/
public abstract void process(Spannable spanable);
/**
* Method that request to the syntax highlight processor to process and highlight a
* document. This method request a partial process.
*
* @param spanable The spannable source to highlight
* @param start The start of spannable to process
* @param end The end of spannable to process
*/
public abstract void process(Spannable spanable, int start, int end);
/**
* Method that cancels the active processor
*/
public abstract void cancel();
/**
* Method that clear all the existent spans
*
* @param spanable The spannable
*/
@SuppressWarnings("static-method")
public void clear(Spannable spanable) {
ForegroundColorSpan[] spans =
spanable.getSpans(0, spanable.length(), ForegroundColorSpan.class);
int cc = spans.length;
for (int i = 0; i < cc; i++) {
spanable.removeSpan(spans[i]);
}
}
/**
* Method that sets a new <code>Spannable</code>.
*
* @param spanable The spannable
* @param color The color of the span
* @param start The start of the span
* @param end The end of the span
*/
@SuppressWarnings("static-method")
protected void setSpan(Spannable spanable, int color, int start, int end) {
if (start == end) return;
spanable.setSpan(
new ForegroundColorSpan(color),
start,
end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
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