[core] Introduce PropertyValue<T>

PropertyValue<T> represents the three possible types of style property value: undefined, constant, or function.

7 files changed, 170 insertions, 167 deletions

diff --git a/include/mbgl/layer/background_layer.hpp b/include/mbgl/layer/background_layer.hpp
index 79f24990e6..211597f6ea 100644
--- a/include/mbgl/layer/background_layer.hpp
+++ b/include/mbgl/layer/background_layer.hpp
@@ -3,6 +3,7 @@
 #pragma once
 
 #include <mbgl/style/layer.hpp>
+#include <mbgl/style/property_value.hpp>
 
 namespace mbgl {
 
@@ -13,14 +14,14 @@ public:
 
     // Paint properties
 
-    Function<Color> getBackgroundColor() const;
-    void setBackgroundColor(Function<Color>);
+    PropertyValue<Color> getBackgroundColor() const;
+    void setBackgroundColor(PropertyValue<Color>);
 
-    Function<std::string> getBackgroundPattern() const;
-    void setBackgroundPattern(Function<std::string>);
+    PropertyValue<std::string> getBackgroundPattern() const;
+    void setBackgroundPattern(PropertyValue<std::string>);
 
-    Function<float> getBackgroundOpacity() const;
-    void setBackgroundOpacity(Function<float>);
+    PropertyValue<float> getBackgroundOpacity() const;
+    void setBackgroundOpacity(PropertyValue<float>);
 
     // Private implementation
 
diff --git a/include/mbgl/layer/circle_layer.hpp b/include/mbgl/layer/circle_layer.hpp
index 14b9da895f..28e5c2fa7a 100644
--- a/include/mbgl/layer/circle_layer.hpp
+++ b/include/mbgl/layer/circle_layer.hpp
@@ -3,6 +3,7 @@
 #pragma once
 
 #include <mbgl/style/layer.hpp>
+#include <mbgl/style/property_value.hpp>
 
 namespace mbgl {
 
@@ -19,23 +20,23 @@ public:
 
     // Paint properties
 
-    Function<float> getCircleRadius() const;
-    void setCircleRadius(Function<float>);
+    PropertyValue<float> getCircleRadius() const;
+    void setCircleRadius(PropertyValue<float>);
 
-    Function<Color> getCircleColor() const;
-    void setCircleColor(Function<Color>);
+    PropertyValue<Color> getCircleColor() const;
+    void setCircleColor(PropertyValue<Color>);
 
-    Function<float> getCircleBlur() const;
-    void setCircleBlur(Function<float>);
+    PropertyValue<float> getCircleBlur() const;
+    void setCircleBlur(PropertyValue<float>);
 
-    Function<float> getCircleOpacity() const;
-    void setCircleOpacity(Function<float>);
+    PropertyValue<float> getCircleOpacity() const;
+    void setCircleOpacity(PropertyValue<float>);
 
-    Function<std::array<float, 2>> getCircleTranslate() const;
-    void setCircleTranslate(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getCircleTranslate() const;
+    void setCircleTranslate(PropertyValue<std::array<float, 2>>);
 
-    Function<TranslateAnchorType> getCircleTranslateAnchor() const;
-    void setCircleTranslateAnchor(Function<TranslateAnchorType>);
+    PropertyValue<TranslateAnchorType> getCircleTranslateAnchor() const;
+    void setCircleTranslateAnchor(PropertyValue<TranslateAnchorType>);
 
     // Private implementation
 
diff --git a/include/mbgl/layer/fill_layer.hpp b/include/mbgl/layer/fill_layer.hpp
index dc0752f9e2..76c043957d 100644
--- a/include/mbgl/layer/fill_layer.hpp
+++ b/include/mbgl/layer/fill_layer.hpp
@@ -3,6 +3,7 @@
 #pragma once
 
 #include <mbgl/style/layer.hpp>
+#include <mbgl/style/property_value.hpp>
 
 namespace mbgl {
 
@@ -19,26 +20,26 @@ public:
 
     // Paint properties
 
-    Function<bool> getFillAntialias() const;
-    void setFillAntialias(Function<bool>);
+    PropertyValue<bool> getFillAntialias() const;
+    void setFillAntialias(PropertyValue<bool>);
 
-    Function<float> getFillOpacity() const;
-    void setFillOpacity(Function<float>);
+    PropertyValue<float> getFillOpacity() const;
+    void setFillOpacity(PropertyValue<float>);
 
-    Function<Color> getFillColor() const;
-    void setFillColor(Function<Color>);
+    PropertyValue<Color> getFillColor() const;
+    void setFillColor(PropertyValue<Color>);
 
-    Function<Color> getFillOutlineColor() const;
-    void setFillOutlineColor(Function<Color>);
+    PropertyValue<Color> getFillOutlineColor() const;
+    void setFillOutlineColor(PropertyValue<Color>);
 
-    Function<std::array<float, 2>> getFillTranslate() const;
-    void setFillTranslate(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getFillTranslate() const;
+    void setFillTranslate(PropertyValue<std::array<float, 2>>);
 
-    Function<TranslateAnchorType> getFillTranslateAnchor() const;
-    void setFillTranslateAnchor(Function<TranslateAnchorType>);
+    PropertyValue<TranslateAnchorType> getFillTranslateAnchor() const;
+    void setFillTranslateAnchor(PropertyValue<TranslateAnchorType>);
 
-    Function<std::string> getFillPattern() const;
-    void setFillPattern(Function<std::string>);
+    PropertyValue<std::string> getFillPattern() const;
+    void setFillPattern(PropertyValue<std::string>);
 
     // Private implementation
 
diff --git a/include/mbgl/layer/line_layer.hpp b/include/mbgl/layer/line_layer.hpp
index 0f898d3c69..b438799116 100644
--- a/include/mbgl/layer/line_layer.hpp
+++ b/include/mbgl/layer/line_layer.hpp
@@ -3,6 +3,7 @@
 #pragma once
 
 #include <mbgl/style/layer.hpp>
+#include <mbgl/style/property_value.hpp>
 
 #include <vector>
 
@@ -21,49 +22,49 @@ public:
 
     // Layout properties
 
-    Function<LineCapType> getLineCap() const;
-    void setLineCap(Function<LineCapType>);
+    PropertyValue<LineCapType> getLineCap() const;
+    void setLineCap(PropertyValue<LineCapType>);
 
-    Function<LineJoinType> getLineJoin() const;
-    void setLineJoin(Function<LineJoinType>);
+    PropertyValue<LineJoinType> getLineJoin() const;
+    void setLineJoin(PropertyValue<LineJoinType>);
 
-    Function<float> getLineMiterLimit() const;
-    void setLineMiterLimit(Function<float>);
+    PropertyValue<float> getLineMiterLimit() const;
+    void setLineMiterLimit(PropertyValue<float>);
 
-    Function<float> getLineRoundLimit() const;
-    void setLineRoundLimit(Function<float>);
+    PropertyValue<float> getLineRoundLimit() const;
+    void setLineRoundLimit(PropertyValue<float>);
 
     // Paint properties
 
-    Function<float> getLineOpacity() const;
-    void setLineOpacity(Function<float>);
+    PropertyValue<float> getLineOpacity() const;
+    void setLineOpacity(PropertyValue<float>);
 
-    Function<Color> getLineColor() const;
-    void setLineColor(Function<Color>);
+    PropertyValue<Color> getLineColor() const;
+    void setLineColor(PropertyValue<Color>);
 
-    Function<std::array<float, 2>> getLineTranslate() const;
-    void setLineTranslate(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getLineTranslate() const;
+    void setLineTranslate(PropertyValue<std::array<float, 2>>);
 
-    Function<TranslateAnchorType> getLineTranslateAnchor() const;
-    void setLineTranslateAnchor(Function<TranslateAnchorType>);
+    PropertyValue<TranslateAnchorType> getLineTranslateAnchor() const;
+    void setLineTranslateAnchor(PropertyValue<TranslateAnchorType>);
 
-    Function<float> getLineWidth() const;
-    void setLineWidth(Function<float>);
+    PropertyValue<float> getLineWidth() const;
+    void setLineWidth(PropertyValue<float>);
 
-    Function<float> getLineGapWidth() const;
-    void setLineGapWidth(Function<float>);
+    PropertyValue<float> getLineGapWidth() const;
+    void setLineGapWidth(PropertyValue<float>);
 
-    Function<float> getLineOffset() const;
-    void setLineOffset(Function<float>);
+    PropertyValue<float> getLineOffset() const;
+    void setLineOffset(PropertyValue<float>);
 
-    Function<float> getLineBlur() const;
-    void setLineBlur(Function<float>);
+    PropertyValue<float> getLineBlur() const;
+    void setLineBlur(PropertyValue<float>);
 
-    Function<std::vector<float>> getLineDasharray() const;
-    void setLineDasharray(Function<std::vector<float>>);
+    PropertyValue<std::vector<float>> getLineDasharray() const;
+    void setLineDasharray(PropertyValue<std::vector<float>>);
 
-    Function<std::string> getLinePattern() const;
-    void setLinePattern(Function<std::string>);
+    PropertyValue<std::string> getLinePattern() const;
+    void setLinePattern(PropertyValue<std::string>);
 
     // Private implementation
 
diff --git a/include/mbgl/layer/raster_layer.hpp b/include/mbgl/layer/raster_layer.hpp
index 9dc27a274a..5d747737c0 100644
--- a/include/mbgl/layer/raster_layer.hpp
+++ b/include/mbgl/layer/raster_layer.hpp
@@ -3,6 +3,7 @@
 #pragma once
 
 #include <mbgl/style/layer.hpp>
+#include <mbgl/style/property_value.hpp>
 
 namespace mbgl {
 
@@ -18,26 +19,26 @@ public:
 
     // Paint properties
 
-    Function<float> getRasterOpacity() const;
-    void setRasterOpacity(Function<float>);
+    PropertyValue<float> getRasterOpacity() const;
+    void setRasterOpacity(PropertyValue<float>);
 
-    Function<float> getRasterHueRotate() const;
-    void setRasterHueRotate(Function<float>);
+    PropertyValue<float> getRasterHueRotate() const;
+    void setRasterHueRotate(PropertyValue<float>);
 
-    Function<float> getRasterBrightnessMin() const;
-    void setRasterBrightnessMin(Function<float>);
+    PropertyValue<float> getRasterBrightnessMin() const;
+    void setRasterBrightnessMin(PropertyValue<float>);
 
-    Function<float> getRasterBrightnessMax() const;
-    void setRasterBrightnessMax(Function<float>);
+    PropertyValue<float> getRasterBrightnessMax() const;
+    void setRasterBrightnessMax(PropertyValue<float>);
 
-    Function<float> getRasterSaturation() const;
-    void setRasterSaturation(Function<float>);
+    PropertyValue<float> getRasterSaturation() const;
+    void setRasterSaturation(PropertyValue<float>);
 
-    Function<float> getRasterContrast() const;
-    void setRasterContrast(Function<float>);
+    PropertyValue<float> getRasterContrast() const;
+    void setRasterContrast(PropertyValue<float>);
 
-    Function<float> getRasterFadeDuration() const;
-    void setRasterFadeDuration(Function<float>);
+    PropertyValue<float> getRasterFadeDuration() const;
+    void setRasterFadeDuration(PropertyValue<float>);
 
     // Private implementation
 
diff --git a/include/mbgl/layer/symbol_layer.hpp b/include/mbgl/layer/symbol_layer.hpp
index f9b2956390..2339515201 100644
--- a/include/mbgl/layer/symbol_layer.hpp
+++ b/include/mbgl/layer/symbol_layer.hpp
@@ -3,6 +3,7 @@
 #pragma once
 
 #include <mbgl/style/layer.hpp>
+#include <mbgl/style/property_value.hpp>
 
 #include <vector>
 
@@ -21,142 +22,142 @@ public:
 
     // Layout properties
 
-    Function<SymbolPlacementType> getSymbolPlacement() const;
-    void setSymbolPlacement(Function<SymbolPlacementType>);
+    PropertyValue<SymbolPlacementType> getSymbolPlacement() const;
+    void setSymbolPlacement(PropertyValue<SymbolPlacementType>);
 
-    Function<float> getSymbolSpacing() const;
-    void setSymbolSpacing(Function<float>);
+    PropertyValue<float> getSymbolSpacing() const;
+    void setSymbolSpacing(PropertyValue<float>);
 
-    Function<bool> getSymbolAvoidEdges() const;
-    void setSymbolAvoidEdges(Function<bool>);
+    PropertyValue<bool> getSymbolAvoidEdges() const;
+    void setSymbolAvoidEdges(PropertyValue<bool>);
 
-    Function<bool> getIconAllowOverlap() const;
-    void setIconAllowOverlap(Function<bool>);
+    PropertyValue<bool> getIconAllowOverlap() const;
+    void setIconAllowOverlap(PropertyValue<bool>);
 
-    Function<bool> getIconIgnorePlacement() const;
-    void setIconIgnorePlacement(Function<bool>);
+    PropertyValue<bool> getIconIgnorePlacement() const;
+    void setIconIgnorePlacement(PropertyValue<bool>);
 
-    Function<bool> getIconOptional() const;
-    void setIconOptional(Function<bool>);
+    PropertyValue<bool> getIconOptional() const;
+    void setIconOptional(PropertyValue<bool>);
 
-    Function<RotationAlignmentType> getIconRotationAlignment() const;
-    void setIconRotationAlignment(Function<RotationAlignmentType>);
+    PropertyValue<RotationAlignmentType> getIconRotationAlignment() const;
+    void setIconRotationAlignment(PropertyValue<RotationAlignmentType>);
 
-    Function<float> getIconSize() const;
-    void setIconSize(Function<float>);
+    PropertyValue<float> getIconSize() const;
+    void setIconSize(PropertyValue<float>);
 
-    Function<std::string> getIconImage() const;
-    void setIconImage(Function<std::string>);
+    PropertyValue<std::string> getIconImage() const;
+    void setIconImage(PropertyValue<std::string>);
 
-    Function<float> getIconRotate() const;
-    void setIconRotate(Function<float>);
+    PropertyValue<float> getIconRotate() const;
+    void setIconRotate(PropertyValue<float>);
 
-    Function<float> getIconPadding() const;
-    void setIconPadding(Function<float>);
+    PropertyValue<float> getIconPadding() const;
+    void setIconPadding(PropertyValue<float>);
 
-    Function<bool> getIconKeepUpright() const;
-    void setIconKeepUpright(Function<bool>);
+    PropertyValue<bool> getIconKeepUpright() const;
+    void setIconKeepUpright(PropertyValue<bool>);
 
-    Function<std::array<float, 2>> getIconOffset() const;
-    void setIconOffset(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getIconOffset() const;
+    void setIconOffset(PropertyValue<std::array<float, 2>>);
 
-    Function<RotationAlignmentType> getTextRotationAlignment() const;
-    void setTextRotationAlignment(Function<RotationAlignmentType>);
+    PropertyValue<RotationAlignmentType> getTextRotationAlignment() const;
+    void setTextRotationAlignment(PropertyValue<RotationAlignmentType>);
 
-    Function<std::string> getTextField() const;
-    void setTextField(Function<std::string>);
+    PropertyValue<std::string> getTextField() const;
+    void setTextField(PropertyValue<std::string>);
 
-    Function<std::vector<std::string>> getTextFont() const;
-    void setTextFont(Function<std::vector<std::string>>);
+    PropertyValue<std::vector<std::string>> getTextFont() const;
+    void setTextFont(PropertyValue<std::vector<std::string>>);
 
-    Function<float> getTextSize() const;
-    void setTextSize(Function<float>);
+    PropertyValue<float> getTextSize() const;
+    void setTextSize(PropertyValue<float>);
 
-    Function<float> getTextMaxWidth() const;
-    void setTextMaxWidth(Function<float>);
+    PropertyValue<float> getTextMaxWidth() const;
+    void setTextMaxWidth(PropertyValue<float>);
 
-    Function<float> getTextLineHeight() const;
-    void setTextLineHeight(Function<float>);
+    PropertyValue<float> getTextLineHeight() const;
+    void setTextLineHeight(PropertyValue<float>);
 
-    Function<float> getTextLetterSpacing() const;
-    void setTextLetterSpacing(Function<float>);
+    PropertyValue<float> getTextLetterSpacing() const;
+    void setTextLetterSpacing(PropertyValue<float>);
 
-    Function<TextJustifyType> getTextJustify() const;
-    void setTextJustify(Function<TextJustifyType>);
+    PropertyValue<TextJustifyType> getTextJustify() const;
+    void setTextJustify(PropertyValue<TextJustifyType>);
 
-    Function<TextAnchorType> getTextAnchor() const;
-    void setTextAnchor(Function<TextAnchorType>);
+    PropertyValue<TextAnchorType> getTextAnchor() const;
+    void setTextAnchor(PropertyValue<TextAnchorType>);
 
-    Function<float> getTextMaxAngle() const;
-    void setTextMaxAngle(Function<float>);
+    PropertyValue<float> getTextMaxAngle() const;
+    void setTextMaxAngle(PropertyValue<float>);
 
-    Function<float> getTextRotate() const;
-    void setTextRotate(Function<float>);
+    PropertyValue<float> getTextRotate() const;
+    void setTextRotate(PropertyValue<float>);
 
-    Function<float> getTextPadding() const;
-    void setTextPadding(Function<float>);
+    PropertyValue<float> getTextPadding() const;
+    void setTextPadding(PropertyValue<float>);
 
-    Function<bool> getTextKeepUpright() const;
-    void setTextKeepUpright(Function<bool>);
+    PropertyValue<bool> getTextKeepUpright() const;
+    void setTextKeepUpright(PropertyValue<bool>);
 
-    Function<TextTransformType> getTextTransform() const;
-    void setTextTransform(Function<TextTransformType>);
+    PropertyValue<TextTransformType> getTextTransform() const;
+    void setTextTransform(PropertyValue<TextTransformType>);
 
-    Function<std::array<float, 2>> getTextOffset() const;
-    void setTextOffset(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getTextOffset() const;
+    void setTextOffset(PropertyValue<std::array<float, 2>>);
 
-    Function<bool> getTextAllowOverlap() const;
-    void setTextAllowOverlap(Function<bool>);
+    PropertyValue<bool> getTextAllowOverlap() const;
+    void setTextAllowOverlap(PropertyValue<bool>);
 
-    Function<bool> getTextIgnorePlacement() const;
-    void setTextIgnorePlacement(Function<bool>);
+    PropertyValue<bool> getTextIgnorePlacement() const;
+    void setTextIgnorePlacement(PropertyValue<bool>);
 
-    Function<bool> getTextOptional() const;
-    void setTextOptional(Function<bool>);
+    PropertyValue<bool> getTextOptional() const;
+    void setTextOptional(PropertyValue<bool>);
 
     // Paint properties
 
-    Function<float> getIconOpacity() const;
-    void setIconOpacity(Function<float>);
+    PropertyValue<float> getIconOpacity() const;
+    void setIconOpacity(PropertyValue<float>);
 
-    Function<Color> getIconColor() const;
-    void setIconColor(Function<Color>);
+    PropertyValue<Color> getIconColor() const;
+    void setIconColor(PropertyValue<Color>);
 
-    Function<Color> getIconHaloColor() const;
-    void setIconHaloColor(Function<Color>);
+    PropertyValue<Color> getIconHaloColor() const;
+    void setIconHaloColor(PropertyValue<Color>);
 
-    Function<float> getIconHaloWidth() const;
-    void setIconHaloWidth(Function<float>);
+    PropertyValue<float> getIconHaloWidth() const;
+    void setIconHaloWidth(PropertyValue<float>);
 
-    Function<float> getIconHaloBlur() const;
-    void setIconHaloBlur(Function<float>);
+    PropertyValue<float> getIconHaloBlur() const;
+    void setIconHaloBlur(PropertyValue<float>);
 
-    Function<std::array<float, 2>> getIconTranslate() const;
-    void setIconTranslate(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getIconTranslate() const;
+    void setIconTranslate(PropertyValue<std::array<float, 2>>);
 
-    Function<TranslateAnchorType> getIconTranslateAnchor() const;
-    void setIconTranslateAnchor(Function<TranslateAnchorType>);
+    PropertyValue<TranslateAnchorType> getIconTranslateAnchor() const;
+    void setIconTranslateAnchor(PropertyValue<TranslateAnchorType>);
 
-    Function<float> getTextOpacity() const;
-    void setTextOpacity(Function<float>);
+    PropertyValue<float> getTextOpacity() const;
+    void setTextOpacity(PropertyValue<float>);
 
-    Function<Color> getTextColor() const;
-    void setTextColor(Function<Color>);
+    PropertyValue<Color> getTextColor() const;
+    void setTextColor(PropertyValue<Color>);
 
-    Function<Color> getTextHaloColor() const;
-    void setTextHaloColor(Function<Color>);
+    PropertyValue<Color> getTextHaloColor() const;
+    void setTextHaloColor(PropertyValue<Color>);
 
-    Function<float> getTextHaloWidth() const;
-    void setTextHaloWidth(Function<float>);
+    PropertyValue<float> getTextHaloWidth() const;
+    void setTextHaloWidth(PropertyValue<float>);
 
-    Function<float> getTextHaloBlur() const;
-    void setTextHaloBlur(Function<float>);
+    PropertyValue<float> getTextHaloBlur() const;
+    void setTextHaloBlur(PropertyValue<float>);
 
-    Function<std::array<float, 2>> getTextTranslate() const;
-    void setTextTranslate(Function<std::array<float, 2>>);
+    PropertyValue<std::array<float, 2>> getTextTranslate() const;
+    void setTextTranslate(PropertyValue<std::array<float, 2>>);
 
-    Function<TranslateAnchorType> getTextTranslateAnchor() const;
-    void setTextTranslateAnchor(Function<TranslateAnchorType>);
+    PropertyValue<TranslateAnchorType> getTextTranslateAnchor() const;
+    void setTextTranslateAnchor(PropertyValue<TranslateAnchorType>);
 
     // Private implementation
 
diff --git a/include/mbgl/style/types.hpp b/include/mbgl/style/types.hpp
index ea09ccfb0c..56f3570357 100644
--- a/include/mbgl/style/types.hpp
+++ b/include/mbgl/style/types.hpp
@@ -27,9 +27,6 @@ public:
     using Stop = std::pair<float, T>;
     using Stops = std::vector<Stop>;
 
-    Function(const T& constant)
-        : stops({{ 0, constant }}) {}
-
     explicit Function(const Stops& stops_, float base_)
         : base(base_), stops(stops_) {}