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/*
* Copyright 2011 Google Inc.
*
* 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.google.gwt.dom.builder.client;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.shared.impl.StringCase;
import com.google.gwt.dom.builder.shared.StylesBuilder;
import com.google.gwt.dom.client.Style.BorderStyle;
import com.google.gwt.dom.client.Style.Cursor;
import com.google.gwt.dom.client.Style.Display;
import com.google.gwt.dom.client.Style.Float;
import com.google.gwt.dom.client.Style.FontStyle;
import com.google.gwt.dom.client.Style.FontWeight;
import com.google.gwt.dom.client.Style.ListStyleType;
import com.google.gwt.dom.client.Style.OutlineStyle;
import com.google.gwt.dom.client.Style.Overflow;
import com.google.gwt.dom.client.Style.Position;
import com.google.gwt.dom.client.Style.TableLayout;
import com.google.gwt.dom.client.Style.TextAlign;
import com.google.gwt.dom.client.Style.TextDecoration;
import com.google.gwt.dom.client.Style.TextJustify;
import com.google.gwt.dom.client.Style.TextOverflow;
import com.google.gwt.dom.client.Style.TextTransform;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.dom.client.Style.VerticalAlign;
import com.google.gwt.dom.client.Style.Visibility;
import com.google.gwt.regexp.shared.MatchResult;
import com.google.gwt.regexp.shared.RegExp;
import com.google.gwt.safehtml.shared.SafeUri;
/**
* Builds the style object.
*/
class DomStylesBuilder implements StylesBuilder {
/**
* A map of hyphenated style properties to their camelCase equivalents.
*
* The set of style property names is limited, and common ones are reused
* frequently, so caching saves us from converting every style property name
* from hyphenated to camelCase form.
*
* Use a {@link JavaScriptObject} to avoid the dynamic casts associated with
* the emulated version of {@link java.util.Map}.
*/
private static JavaScriptObject hyphenatedMap;
/**
* Regex to match a word in a hyphenated phrase. A word starts with an a
* hyphen or a letter, followed by zero or more characters letters. For
* example, in the phrase background-url, the pattern matches "background" and
* "-url".
*/
private static RegExp maybeHyphenatedWord;
/**
* Convert a hyphenated or camelCase string to a camelCase string.
*
* @param name the hyphenated or camelCase string to convert
* @return the hyphenated string
*/
// Visible for testing
static String toCamelCaseForm(String name) {
// Static initializers.
if (hyphenatedMap == null) {
hyphenatedMap = JavaScriptObject.createObject();
maybeHyphenatedWord = RegExp.compile("([-]?)([a-z])([a-z0-9]*)", "g");
}
// Early exit if already in camelCase form.
if (!name.contains("-")) {
return name;
}
// Check for the name in the cache.
String camelCase = getCamelCaseName(hyphenatedMap, name);
// Convert the name to camelCase format if not in the cache.
if (camelCase == null) {
/*
* Strip of any leading hyphens, which are used in browser specified style
* properties such as "-webkit-border-radius". In this case, the first
* word "webkit" should remain lowercase.
*/
if (name.startsWith("-") && name.length() > 1) {
name = name.substring(1);
}
camelCase = "";
MatchResult matches;
while ((matches = maybeHyphenatedWord.exec(name)) != null) {
String word = matches.getGroup(0);
if (!word.startsWith("-")) {
// The word is not hyphenated. Probably the first word.
camelCase += word;
} else {
// Remove hyphen and uppercase next letter.
camelCase += StringCase.toUpper(matches.getGroup(2));
if (matches.getGroupCount() > 2) {
camelCase += matches.getGroup(3);
}
}
}
putCamelCaseName(hyphenatedMap, name, camelCase);
}
return camelCase;
}
/**
* Get the camelCase form of a style name to a map.
*
* @param name the user specified style name
* @return the camelCase name, or null if not set
*/
private static native String getCamelCaseName(JavaScriptObject map, String name) /*-{
return map[name] || null;
}-*/;
/**
* Save the camelCase form of a style name to a map.
*
* @param name the user specified style name
* @param camelCase the camelCase name
*/
private static native void putCamelCaseName(JavaScriptObject map, String name, String camelCase) /*-{
map[name] = camelCase;
}-*/;
private final DomBuilderImpl delegate;
/**
* Construct a new {@link DomStylesBuilder}.
*
* @param delegate the delegate that builds the style
*/
DomStylesBuilder(DomBuilderImpl delegate) {
this.delegate = delegate;
}
@Override
public StylesBuilder backgroundImage(SafeUri uri) {
delegate.assertCanAddStyleProperty().setBackgroundImage(uri.asString());
return this;
}
@Override
public StylesBuilder borderStyle(BorderStyle value) {
delegate.assertCanAddStyleProperty().setBorderStyle(value);
return this;
}
@Override
public StylesBuilder borderWidth(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setBorderWidth(value, unit);
return this;
}
@Override
public StylesBuilder bottom(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setBottom(value, unit);
return this;
}
@Override
public StylesBuilder cursor(Cursor value) {
delegate.assertCanAddStyleProperty().setCursor(value);
return this;
}
@Override
public StylesBuilder display(Display value) {
delegate.assertCanAddStyleProperty().setDisplay(value);
return this;
}
@Override
public void endStyle() {
delegate.endStyle();
}
@Override
public StylesBuilder floatprop(Float value) {
delegate.assertCanAddStyleProperty().setFloat(value);
return this;
}
@Override
public StylesBuilder fontSize(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setFontSize(value, unit);
return this;
}
@Override
public StylesBuilder fontStyle(FontStyle value) {
delegate.assertCanAddStyleProperty().setFontStyle(value);
return this;
}
@Override
public StylesBuilder fontWeight(FontWeight value) {
delegate.assertCanAddStyleProperty().setFontWeight(value);
return this;
}
@Override
public StylesBuilder height(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setHeight(value, unit);
return this;
}
@Override
public StylesBuilder left(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setLeft(value, unit);
return this;
}
@Override
public StylesBuilder lineHeight(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setLineHeight(value, unit);
return this;
}
@Override
public StylesBuilder listStyleType(ListStyleType value) {
delegate.assertCanAddStyleProperty().setListStyleType(value);
return this;
}
@Override
public StylesBuilder margin(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setMargin(value, unit);
return this;
}
@Override
public StylesBuilder marginBottom(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setMarginBottom(value, unit);
return this;
}
@Override
public StylesBuilder marginLeft(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setMarginLeft(value, unit);
return this;
}
@Override
public StylesBuilder marginRight(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setMarginRight(value, unit);
return this;
}
@Override
public StylesBuilder marginTop(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setMarginTop(value, unit);
return this;
}
@Override
public StylesBuilder opacity(double value) {
delegate.assertCanAddStyleProperty().setOpacity(value);
return this;
}
@Override
public StylesBuilder outlineStyle(OutlineStyle value) {
delegate.assertCanAddStyleProperty().setOutlineStyle(value);
return this;
}
@Override
public StylesBuilder outlineWidth(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setOutlineWidth(value, unit);
return this;
}
@Override
public StylesBuilder overflow(Overflow value) {
delegate.assertCanAddStyleProperty().setOverflow(value);
return this;
}
@Override
public StylesBuilder overflowX(Overflow value) {
delegate.assertCanAddStyleProperty().setOverflowX(value);
return this;
}
@Override
public StylesBuilder overflowY(Overflow value) {
delegate.assertCanAddStyleProperty().setOverflowY(value);
return this;
}
@Override
public StylesBuilder padding(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setPadding(value, unit);
return this;
}
@Override
public StylesBuilder paddingBottom(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setPaddingBottom(value, unit);
return this;
}
@Override
public StylesBuilder paddingLeft(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setPaddingLeft(value, unit);
return this;
}
@Override
public StylesBuilder paddingRight(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setPaddingRight(value, unit);
return this;
}
@Override
public StylesBuilder paddingTop(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setPaddingTop(value, unit);
return this;
}
@Override
public StylesBuilder position(Position value) {
delegate.assertCanAddStyleProperty().setPosition(value);
return this;
}
@Override
public StylesBuilder right(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setRight(value, unit);
return this;
}
@Override
public StylesBuilder tableLayout(TableLayout value) {
delegate.assertCanAddStyleProperty().setTableLayout(value);
return this;
}
@Override
public StylesBuilder textAlign(TextAlign value) {
delegate.assertCanAddStyleProperty().setTextAlign(value);
return this;
}
@Override
public StylesBuilder textDecoration(TextDecoration value) {
delegate.assertCanAddStyleProperty().setTextDecoration(value);
return this;
}
@Override
public StylesBuilder textIndent(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setTextIndent(value, unit);
return this;
}
@Override
public StylesBuilder textJustify(TextJustify value) {
delegate.assertCanAddStyleProperty().setTextJustify(value);
return this;
}
@Override
public StylesBuilder textOverflow(TextOverflow value) {
delegate.assertCanAddStyleProperty().setTextOverflow(value);
return this;
}
@Override
public StylesBuilder textTransform(TextTransform value) {
delegate.assertCanAddStyleProperty().setTextTransform(value);
return this;
}
@Override
public StylesBuilder top(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setTop(value, unit);
return this;
}
@Override
public StylesBuilder trustedBackgroundColor(String value) {
delegate.assertCanAddStyleProperty().setBackgroundColor(value);
return this;
}
@Override
public StylesBuilder trustedBackgroundImage(String value) {
delegate.assertCanAddStyleProperty().setBackgroundImage(value);
return this;
}
@Override
public StylesBuilder trustedBorderColor(String value) {
delegate.assertCanAddStyleProperty().setBorderColor(value);
return this;
}
@Override
public StylesBuilder trustedColor(String value) {
delegate.assertCanAddStyleProperty().setColor(value);
return this;
}
@Override
public StylesBuilder trustedOutlineColor(String value) {
delegate.assertCanAddStyleProperty().setOutlineColor(value);
return this;
}
@Override
public StylesBuilder trustedProperty(String name, double value, Unit unit) {
name = toCamelCaseForm(name);
delegate.assertCanAddStyleProperty().setProperty(name, value, unit);
return this;
}
@Override
public StylesBuilder trustedProperty(String name, String value) {
name = toCamelCaseForm(name);
delegate.assertCanAddStyleProperty().setProperty(name, value);
return this;
}
@Override
public StylesBuilder verticalAlign(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setVerticalAlign(value, unit);
return this;
}
@Override
public StylesBuilder verticalAlign(VerticalAlign value) {
delegate.assertCanAddStyleProperty().setVerticalAlign(value);
return this;
}
@Override
public StylesBuilder visibility(Visibility value) {
delegate.assertCanAddStyleProperty().setVisibility(value);
return this;
}
@Override
public StylesBuilder width(double value, Unit unit) {
delegate.assertCanAddStyleProperty().setWidth(value, unit);
return this;
}
@Override
public StylesBuilder zIndex(int value) {
delegate.assertCanAddStyleProperty().setZIndex(value);
return this;
}
}
