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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 iText Group NV
Authors: iText Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
*/
package com.itextpdf.styledxmlparser.css.validate.impl;
import com.itextpdf.styledxmlparser.css.CommonCssConstants;
import com.itextpdf.styledxmlparser.css.CssDeclaration;
import com.itextpdf.styledxmlparser.css.validate.ICssDeclarationValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.ArrayDataTypeValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssBackgroundValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssBlendModeValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssColorValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssEnumValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssLengthValueValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssNumberValueValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssPercentageValueValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssQuotesValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.datatype.CssTransformValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.declaration.MultiTypeDeclarationValidator;
import com.itextpdf.styledxmlparser.css.validate.impl.declaration.SingleTypeDeclarationValidator;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
* Class that bundles all the CSS declaration validators.
* It validates CSS declarations against the accepted html/css standard.
*/
public class CssDefaultValidator implements ICssDeclarationValidator {
/**
* A map containing all the CSS declaration validators.
*/
protected final Map defaultValidators;
public CssDefaultValidator() {
ICssDeclarationValidator colorCommonValidator = new MultiTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.TRANSPARENT, CommonCssConstants.INITIAL,
CommonCssConstants.INHERIT, CommonCssConstants.CURRENTCOLOR),
new CssColorValidator());
final CssEnumValidator normalValidator = new CssEnumValidator(CommonCssConstants.NORMAL);
final CssEnumValidator relativeSizeValidator =
new CssEnumValidator(CommonCssConstants.LARGER, CommonCssConstants.SMALLER);
final CssEnumValidator absoluteSizeValidator = new CssEnumValidator();
absoluteSizeValidator.addAllowedValues(CommonCssConstants.FONT_ABSOLUTE_SIZE_KEYWORDS_VALUES.keySet());
final CssEnumValidator inheritInitialUnsetValidator = new CssEnumValidator(
CommonCssConstants.INHERIT, CommonCssConstants.INITIAL, CommonCssConstants.UNSET);
defaultValidators = new HashMap<>();
defaultValidators.put(CommonCssConstants.BACKGROUND_COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.BORDER_COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.BORDER_BOTTOM_COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.BORDER_TOP_COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.BORDER_LEFT_COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.BORDER_RIGHT_COLOR, colorCommonValidator);
defaultValidators.put(CommonCssConstants.FLOAT,
new SingleTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.LEFT, CommonCssConstants.RIGHT, CommonCssConstants.NONE,
CommonCssConstants.INHERIT, CommonCssConstants.CENTER /*center comes from legacy*/)));
defaultValidators.put(CommonCssConstants.PAGE_BREAK_BEFORE,
new SingleTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.AUTO, CommonCssConstants.ALWAYS,
CommonCssConstants.AVOID, CommonCssConstants.LEFT, CommonCssConstants.RIGHT)));
defaultValidators.put(CommonCssConstants.PAGE_BREAK_AFTER,
new SingleTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.AUTO, CommonCssConstants.ALWAYS,
CommonCssConstants.AVOID, CommonCssConstants.LEFT, CommonCssConstants.RIGHT)));
defaultValidators.put(CommonCssConstants.QUOTES,
new MultiTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.INITIAL, CommonCssConstants.INHERIT,
CommonCssConstants.NONE),
new CssQuotesValidator()));
defaultValidators.put(CommonCssConstants.TRANSFORM,
new SingleTypeDeclarationValidator(new CssTransformValidator()));
defaultValidators.put(CommonCssConstants.FONT_SIZE, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(false), new CssPercentageValueValidator(false), relativeSizeValidator,
absoluteSizeValidator));
defaultValidators.put(CommonCssConstants.WORD_SPACING, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(true), normalValidator));
defaultValidators.put(CommonCssConstants.LETTER_SPACING, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(true), normalValidator));
defaultValidators.put(CommonCssConstants.TEXT_INDENT, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(true), new CssPercentageValueValidator(true),
new CssEnumValidator(CommonCssConstants.EACH_LINE, CommonCssConstants.HANGING,
CommonCssConstants.HANGING + " " + CommonCssConstants.EACH_LINE)));
defaultValidators.put(CommonCssConstants.LINE_HEIGHT, new MultiTypeDeclarationValidator(
new CssNumberValueValidator(false), new CssLengthValueValidator(false),
new CssPercentageValueValidator(false),
normalValidator, inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.COLUMN_GAP, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(false), new CssPercentageValueValidator(false), normalValidator,
inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.ROW_GAP, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(false), new CssPercentageValueValidator(false), normalValidator,
inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.FLEX_GROW, new MultiTypeDeclarationValidator(
new CssNumberValueValidator(false), inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.FLEX_SHRINK, new MultiTypeDeclarationValidator(
new CssNumberValueValidator(false), inheritInitialUnsetValidator));
final CssEnumValidator flexBasisEnumValidator = new CssEnumValidator(CommonCssConstants.AUTO,
CommonCssConstants.CONTENT, CommonCssConstants.MIN_CONTENT, CommonCssConstants.MAX_CONTENT,
CommonCssConstants.FIT_CONTENT);
defaultValidators.put(CommonCssConstants.FLEX_BASIS, new MultiTypeDeclarationValidator(
new CssLengthValueValidator(false), new CssPercentageValueValidator(false), flexBasisEnumValidator));
defaultValidators.put(CommonCssConstants.BACKGROUND_REPEAT, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_REPEAT)));
defaultValidators.put(CommonCssConstants.BACKGROUND_IMAGE, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_IMAGE)));
defaultValidators.put(CommonCssConstants.BACKGROUND_POSITION_X, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_POSITION_X)));
defaultValidators.put(CommonCssConstants.BACKGROUND_POSITION_Y, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_POSITION_Y)));
defaultValidators.put(CommonCssConstants.BACKGROUND_SIZE, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_SIZE)));
defaultValidators.put(CommonCssConstants.BACKGROUND_CLIP, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_CLIP)));
defaultValidators.put(CommonCssConstants.BACKGROUND_ORIGIN, new SingleTypeDeclarationValidator(
new CssBackgroundValidator(CommonCssConstants.BACKGROUND_ORIGIN)));
defaultValidators.put(CommonCssConstants.BACKGROUND_BLEND_MODE, new SingleTypeDeclarationValidator(
new ArrayDataTypeValidator(new CssBlendModeValidator())));
defaultValidators.put(CommonCssConstants.OVERFLOW_WRAP, new MultiTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.ANYWHERE, CommonCssConstants.BREAK_WORD),
normalValidator, inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.WORD_BREAK, new MultiTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.BREAK_ALL, CommonCssConstants.KEEP_ALL,
CommonCssConstants.BREAK_WORD),
normalValidator,
inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.FLEX_DIRECTION, new MultiTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.ROW, CommonCssConstants.ROW_REVERSE,
CommonCssConstants.COLUMN, CommonCssConstants.COLUMN_REVERSE),
inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.FLEX_WRAP, new MultiTypeDeclarationValidator(
new CssEnumValidator(CommonCssConstants.NOWRAP, CommonCssConstants.WRAP,
CommonCssConstants.WRAP_REVERSE),
inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.ALIGN_ITEMS, new MultiTypeDeclarationValidator(
normalValidator,
new CssEnumValidator(Arrays.asList(CommonCssConstants.BASELINE),
Arrays.asList(CommonCssConstants.FIRST, CommonCssConstants.LAST)),
new CssEnumValidator(
Arrays.asList(CommonCssConstants.STRETCH, CommonCssConstants.CENTER, CommonCssConstants.START,
CommonCssConstants.END, CommonCssConstants.FLEX_START, CommonCssConstants.FLEX_END,
CommonCssConstants.SELF_START, CommonCssConstants.SELF_END),
Arrays.asList(CommonCssConstants.SAFE, CommonCssConstants.UNSAFE)),
inheritInitialUnsetValidator));
defaultValidators.put(CommonCssConstants.JUSTIFY_CONTENT, new MultiTypeDeclarationValidator(
new CssEnumValidator(Arrays.asList(
CommonCssConstants.SPACE_AROUND, CommonCssConstants.SPACE_BETWEEN,
CommonCssConstants.SPACE_EVENLY, CommonCssConstants.STRETCH, CommonCssConstants.NORMAL,
CommonCssConstants.LEFT, CommonCssConstants.RIGHT)),
new CssEnumValidator(Arrays.asList(
CommonCssConstants.CENTER, CommonCssConstants.START, CommonCssConstants.FLEX_START,
CommonCssConstants.SELF_START, CommonCssConstants.END, CommonCssConstants.FLEX_END,
CommonCssConstants.SELF_END),
Arrays.asList(CommonCssConstants.SAFE, CommonCssConstants.UNSAFE)),
inheritInitialUnsetValidator
));
defaultValidators.put(CommonCssConstants.JUSTIFY_ITEMS, new MultiTypeDeclarationValidator(
normalValidator,
new CssEnumValidator(Arrays.asList(CommonCssConstants.BASELINE),
Arrays.asList(CommonCssConstants.FIRST, CommonCssConstants.LAST)),
new CssEnumValidator(
Arrays.asList(CommonCssConstants.STRETCH, CommonCssConstants.CENTER, CommonCssConstants.START,
CommonCssConstants.END, CommonCssConstants.FLEX_START, CommonCssConstants.FLEX_END,
CommonCssConstants.SELF_START, CommonCssConstants.SELF_END, CommonCssConstants.LEFT,
CommonCssConstants.RIGHT),
Arrays.asList(CommonCssConstants.SAFE, CommonCssConstants.UNSAFE)),
new CssEnumValidator(CommonCssConstants.LEGACY,
CommonCssConstants.LEGACY + " " + CommonCssConstants.LEFT,
CommonCssConstants.LEGACY + " " + CommonCssConstants.RIGHT,
CommonCssConstants.LEGACY + " " + CommonCssConstants.CENTER),
inheritInitialUnsetValidator));
}
/**
* Validates a CSS declaration.
*
* @param declaration the CSS declaration
* @return true, if the validation was successful
*/
@Override
public boolean isValid(CssDeclaration declaration) {
ICssDeclarationValidator validator = defaultValidators.get(declaration.getProperty());
return validator == null || validator.isValid(declaration);
}
}
