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Merge pull request #817 from ad619659/design_refactorings
Design refactoring for CounterFunction/FSLinearGradient
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9
openhtmltopdf-core/src/main/java/com/openhtmltopdf/context/ContentFunctionAbstract.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,9 @@ | ||
| package com.openhtmltopdf.context; | ||
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| import com.openhtmltopdf.css.extend.ContentFunction; | ||
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| public abstract class ContentFunctionAbstract implements ContentFunction { | ||
| public boolean isStatic() { | ||
| return false; | ||
| }; | ||
| } |
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92 changes: 92 additions & 0 deletions
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...tmltopdf-core/src/main/java/com/openhtmltopdf/css/style/derived/FSLinearGradientUtil.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,92 @@ | ||
| package com.openhtmltopdf.css.style.derived; | ||
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| import com.openhtmltopdf.css.constants.CSSName; | ||
| import com.openhtmltopdf.css.constants.Idents; | ||
| import com.openhtmltopdf.css.parser.CSSPrimitiveValue; | ||
| import com.openhtmltopdf.css.parser.PropertyValue; | ||
| import com.openhtmltopdf.css.parser.property.AbstractPropertyBuilder; | ||
| import com.openhtmltopdf.css.style.CalculatedStyle; | ||
| import com.openhtmltopdf.css.style.CssContext; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
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| public class FSLinearGradientUtil { | ||
| static float deg2rad(final float deg) { | ||
| return (float) Math.toRadians(deg); | ||
| } | ||
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| static boolean isLengthOrPercentage(PropertyValue value) { | ||
| return AbstractPropertyBuilder.isLengthHelper(value) || | ||
| value.getPrimitiveType() == CSSPrimitiveValue.CSS_PERCENTAGE; | ||
| } | ||
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| static int getStopsStartIndex(List<PropertyValue> params) { | ||
| if (Objects.equals(params.get(0).getStringValue(), "to")) { | ||
| int i = 1; | ||
| while (i < params.size() && | ||
| params.get(i).getStringValue() != null && | ||
| Idents.looksLikeABGPosition(params.get(i).getStringValue())) { | ||
| i++; | ||
| } | ||
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| return i; | ||
| } else { | ||
| return 1; | ||
| } | ||
| } | ||
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| static float get100PercentDefaultStopLength(CalculatedStyle style, CssContext ctx, float boxWidth) { | ||
| return LengthValue.calcFloatProportionalValue(style, CSSName.BACKGROUND_IMAGE, "100%", | ||
| 100f, CSSPrimitiveValue.CSS_PERCENTAGE, boxWidth, ctx); | ||
| } | ||
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| /** | ||
| * Calculates the angle of the linear gradient in degrees. | ||
| */ | ||
| static float calculateAngle(List<PropertyValue> params, int stopsStartIndex) { | ||
| if (Objects.equals(params.get(0).getStringValue(), "to")) { | ||
| // The to keyword is followed by one or two position | ||
| // idents (in any order). | ||
| // linear-gradient( to left top, blue, red); | ||
| // linear-gradient( to top right, blue, red); | ||
| List<String> positions = new ArrayList<>(2); | ||
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| for (int i = 1; i < stopsStartIndex; i++) { | ||
| positions.add(params.get(i).getStringValue()); | ||
| } | ||
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| if (positions.contains("top") && positions.contains("left")) | ||
| return 315f; | ||
| else if (positions.contains("top") && positions.contains("right")) | ||
| return 45f; | ||
| else if (positions.contains("bottom") && positions.contains("left")) | ||
| return 225f; | ||
| else if (positions.contains("bottom") && positions.contains("right")) | ||
| return 135f; | ||
| else if (positions.contains("bottom")) | ||
| return 180f; | ||
| else if (positions.contains("left")) | ||
| return 270f; | ||
| else if (positions.contains("right")) | ||
| return 90f; | ||
| else | ||
| return 0f; | ||
| } | ||
| else if (params.get(0).getPrimitiveType() == CSSPrimitiveValue.CSS_DEG) | ||
| { | ||
| // linear-gradient(45deg, ...) | ||
| return params.get(0).getFloatValue(); | ||
| } | ||
| else if (params.get(0).getPrimitiveType() == CSSPrimitiveValue.CSS_RAD) | ||
| { | ||
| // linear-gradient(2rad) | ||
| return params.get(0).getFloatValue() * (float) (180 / Math.PI); | ||
| } | ||
| else | ||
| { | ||
| return 0f; | ||
| } | ||
| } | ||
| } |
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