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Updated for MaterialComponents for iOS version 34.0.1
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...nces/v34.0.1.Debug/MDFTextAccessibility.framework/Headers/MDFTextAccessibility-umbrella.h
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| #ifdef __OBJC__ | ||
| #import <UIKit/UIKit.h> | ||
| #else | ||
| #ifndef FOUNDATION_EXPORT | ||
| #if defined(__cplusplus) | ||
| #define FOUNDATION_EXPORT extern "C" | ||
| #else | ||
| #define FOUNDATION_EXPORT extern | ||
| #endif | ||
| #endif | ||
| #endif | ||
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| #import "MDFTextAccessibility.h" | ||
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| FOUNDATION_EXPORT double MDFTextAccessibilityVersionNumber; | ||
| FOUNDATION_EXPORT const unsigned char MDFTextAccessibilityVersionString[]; | ||
|
|
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references/v34.0.1.Debug/MDFTextAccessibility.framework/Headers/MDFTextAccessibility.h
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| /* | ||
| Copyright 2016-present Google Inc. All Rights Reserved. | ||
| 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. | ||
| */ | ||
|
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| #import <UIKit/UIKit.h> | ||
|
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| /** Options for selecting text colors that provide acceptable contrast ratios. */ | ||
| typedef NS_OPTIONS(NSUInteger, MDFTextAccessibilityOptions) { | ||
| /** No options. */ | ||
| MDFTextAccessibilityOptionsNone = 0, | ||
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| /** Font size is at least 14pt bold or 18pt normal. */ | ||
| MDFTextAccessibilityOptionsLargeFont = 1 << 0, | ||
|
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| /** Do not modify alpha values to find good colors. */ | ||
| MDFTextAccessibilityOptionsPreserveAlpha = 1 << 1, | ||
|
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| /** Prefer darker colors to lighter colors. */ | ||
| MDFTextAccessibilityOptionsPreferDarker = 1 << 2, | ||
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| /** Prefer lighter colors to darker colors. */ | ||
| MDFTextAccessibilityOptionsPreferLighter = 1 << 3, | ||
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| /** Use enhanced contrast ratios (level AAA) instead of minimum ratios (level AA). */ | ||
| MDFTextAccessibilityOptionsEnhancedContrast = 1 << 4, | ||
| }; | ||
|
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| /** | ||
| MDFTextAccessiblity provides methods to compute accessible text colors. | ||
| */ | ||
| @interface MDFTextAccessibility : NSObject | ||
|
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| /** | ||
| An optionally transparent text color suitable for displaying on a background color with a | ||
| particular font. | ||
| The color returned will be white or black with an alpha value of targetTextAlpha, unless the | ||
| contrast ratio is insufficient, in which case the alpha is increased (made more opaque). | ||
| If the passed font is nil, then a conservative guess is used. | ||
| @param backgroundColor The opaque background color the text will be displayed on. | ||
| @param targetTextAlpha The target alpha of the text. | ||
| @param font The font the text will use or nil. | ||
| @return A color with acceptable contrast ratio for displaying text on |color|. | ||
| */ | ||
| + (nonnull UIColor *)textColorOnBackgroundColor:(nonnull UIColor *)backgroundColor | ||
| targetTextAlpha:(CGFloat)targetTextAlpha | ||
| font:(nullable UIFont *)font; | ||
|
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| /** | ||
| An optionally transparent text color suitable for displaying on a background image with a | ||
| particular font. | ||
| The color returned will be white or black with an alpha value of targetTextAlpha, unless the | ||
| contrast ratio is insufficient, in which case the alpha is increased (made more opaque). | ||
| If the passed font is nil, then a conservative guess is used. | ||
| The content of the background image is simply averaged to make an average color, which is then used | ||
| as if it were the background color of the text. Depending on the contents of the image, this | ||
| approximation may or may not result in legible text. | ||
| The supplied image region will be intersected with the image's bounds. If the resulting region is | ||
| null or empty then this method returns nil. | ||
| @param backgroundImage The opaque background image the text will be displayed on. | ||
| @param region The region in which the text will be displayed. Can be conservatively large. | ||
| @param targetTextAlpha The target alpha of the text. | ||
| @param font The font to be used to display the text. Can be nil. | ||
| @return A color with acceptable contrast ratio, or nil if the region is out of bounds of the image. | ||
| */ | ||
| + (nullable UIColor *)textColorOnBackgroundImage:(nonnull UIImage *)backgroundImage | ||
| inRegion:(CGRect)region | ||
| targetTextAlpha:(CGFloat)targetTextAlpha | ||
| font:(nullable UIFont *)font; | ||
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| #pragma mark Advanced methods | ||
|
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| /** | ||
| An optionally transparent text color suitable for displaying text on a given opaque background | ||
| color. | ||
| This method calls textColorFromChoices:onColor:options: with the choices [white, black], both | ||
| with their alpha set to targetTextAlpha. | ||
| If MDFTextAccessibilityOptionsPreserveAlpha is included in the options, then the algorithm will not | ||
| modify the alpha values, which may result in no color being returned at all. | ||
| @param backgroundColor The opaque background color the text will be displayed on. | ||
| @param targetTextAlpha The target alpha of the text. | ||
| @param options A combination of MDFTextAccessibilityOptions values. | ||
| @return A color with acceptable contrast ratio or nil if no such color exists. | ||
| */ | ||
| + (nullable UIColor *)textColorOnBackgroundColor:(nonnull UIColor *)backgroundColor | ||
| targetTextAlpha:(CGFloat)targetTextAlpha | ||
| options:(MDFTextAccessibilityOptions)options; | ||
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| /** | ||
| A color selected from a set which is suitable for displaying text on a given opaque background | ||
| color. | ||
| Since the minimum ratio for "large" text is less stringent, set | ||
| the MDFTextAccessibilityOptionsLargeFont bit if the font size will be greater than or | ||
| equal to 18pt normal or 14pt bold. If in doubt or if the text size can vary, be conservative and do | ||
| not specify MDFTextAccessibilityOptionsLargeFont in the options. | ||
| By default, the first acceptable color in |choices| will be returned. If | ||
| MDFTextAccessibilityOptionsPreferLighter is set, then the lightest acceptable color will be | ||
| returned, and if MDFTextAccessibilityOptionsPreferDarker is set, then the darkest acceptable color | ||
| will be returned. This allows for a standard set of text colors to be used in different situations. | ||
| By default, the algorithm will attempt to modify the alpha value of colors in |choices| instead | ||
| of switching to an alternate color, under the assumption that text with slightly different | ||
| alpha values is less noticible than, for example, black text where white text is usually used. | ||
| If MDFTextAccessibilityOptionsPreserveAlpha is included in the options, then the algorithm will not | ||
| modify the alpha values, which may result in no color being returned at all. | ||
| @param choices An array of text color UIColor objects with optional alpha values. | ||
| @param backgroundColor The opaque background color the text will be displayed on. | ||
| @param options A combination of MDFTextAccessibilityOptions values. | ||
| @return A color with acceptable contrast ratio or nil if no such color exists. | ||
| */ | ||
| + (nullable UIColor *)textColorFromChoices:(nonnull NSArray<UIColor *> *)choices | ||
| onBackgroundColor:(nonnull UIColor *)backgroundColor | ||
| options:(MDFTextAccessibilityOptions)options; | ||
|
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| /** | ||
| The minimum alpha that text can have and still have an acceptable contrast ratio. Depending on | ||
| color combinations, the minimum useable alpha can vary. | ||
| Since the minimum ratio for "large" text is less stringent, set | ||
| the MDFTextAccessibilityOptionsLargeFont bit if the font size will be greater than or | ||
| equal to 18pt normal or 14pt bold. If in doubt or if the text size can vary, be conservative and do | ||
| not specify MDFTextAccessibilityOptionsLargeFont in the options. | ||
| @note There are some color combinations (white on white) for which an acceptable alpha value | ||
| doesn't exist. | ||
| @param textColor The text color (alpha is ignored). | ||
| @param backgroundColor The opaque background color the text will be displayed on. | ||
| @param options A combination of MDFTextAccessibilityOptions values. | ||
| @return The minimum alpha value to use in this situation, or -1 if there is no such alpha. | ||
| */ | ||
| + (CGFloat)minAlphaOfTextColor:(nonnull UIColor *)textColor | ||
| onBackgroundColor:(nonnull UIColor *)backgroundColor | ||
| options:(MDFTextAccessibilityOptions)options; | ||
|
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| /** | ||
| The contrast ratio of a text color when displayed on an opaque background color. | ||
| @param textColor A text color with optional transparency. | ||
| @param backgroundColor The opaque background color the text will be displayed on. | ||
| @return The contrast ratio of the text color on the background color. | ||
| */ | ||
| + (CGFloat)contrastRatioForTextColor:(nonnull UIColor *)textColor | ||
| onBackgroundColor:(nonnull UIColor *)backgroundColor; | ||
|
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| /** | ||
| Whether a text color passes accessibility standards when displayed on an opaque background color. | ||
| MDFTextAccessibilityOptionsLargeFont and MDFTextAccessibilityOptionsEnhancedContrast are relevant | ||
| options for this method. | ||
| @param textColor A text color with optional transparency. | ||
| @param backgroundColor The opaque background color the text will be displayed on. | ||
| @param options A combination of MDFTextAccessibilityOptions values. | ||
| @return YES if the text color would meet accessibility standards. | ||
| */ | ||
| + (BOOL)textColor:(nonnull UIColor *)textColor | ||
| passesOnBackgroundColor:(nonnull UIColor *)backgroundColor | ||
| options:(MDFTextAccessibilityOptions)options; | ||
|
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| /** | ||
| Whether a particular font would be considered "large" for the purposes of calculating | ||
| contrast ratios. | ||
| Large fonts are defined as greater than 18pt normal or 14pt bold. If the passed font is nil, then | ||
| this method returns NO. | ||
| For more see: https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html | ||
| @param font The font to examine, or nil. | ||
| @return YES if the font is non-nil and is considered "large". | ||
| */ | ||
| + (BOOL)isLargeForContrastRatios:(nullable UIFont *)font; | ||
|
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| @end |
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references/v34.0.1.Debug/MDFTextAccessibility.framework/MDFTextAccessibility
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references/v34.0.1.Debug/MDFTextAccessibility.framework/Modules/module.modulemap
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| framework module MDFTextAccessibility { | ||
| umbrella header "MDFTextAccessibility-umbrella.h" | ||
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| export * | ||
| module * { export * } | ||
| } |
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...rences/v34.0.1.Debug/MDFTextAccessibility.framework/PrivateHeaders/MDFColorCalculations.h
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| /* | ||
| Copyright 2016-present Google Inc. All Rights Reserved. | ||
| 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. | ||
| */ | ||
|
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| #import <UIKit/UIKit.h> | ||
|
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| #if defined(__cplusplus) | ||
| extern "C" { | ||
| #endif | ||
|
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| /** | ||
| Copies the RGBA components of color, expanding greyscale colors out to RGBA if necessary. | ||
| @param color The color to extract the components from. | ||
| @param rgbaComponents A pointer to four CGFloat values. | ||
| */ | ||
| void MDFCopyRGBAComponents(CGColorRef color, CGFloat *rgbaComponents); | ||
|
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| /** | ||
| Returns the contrast ratio of a foreground color blended on top of a background color. | ||
| @param foregroundColorComponents A pointer to four RGBA CGFloats of the foreground color. | ||
| @param backgroundColorComponents A pointer to four RGBA CGFloats of the background color. | ||
| @return The contrast ratio of the two colors after blending. | ||
| */ | ||
| CGFloat MDFContrastRatioOfRGBAComponents(const CGFloat *foregroundColorComponents, | ||
| const CGFloat *backgroundColorComponents); | ||
|
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| /** | ||
| Calculates the relative luminance of a sRGB color from its components (ignores alpha). | ||
| @see http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef | ||
| @param components A pointer to three RGB CGFloat values of the color. | ||
| @return The relative luminance of the color. | ||
| */ | ||
| CGFloat MDFRelativeLuminanceOfRGBComponents(const CGFloat *components); | ||
|
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| /** | ||
| Calculates the minimum alpha that a foreground color can have such that, when it's blended on top | ||
| of an opaque background color, the resulting contrast ratio is higher than a minimum contrast | ||
| ratio. | ||
| If there is no such acceptable contrast ratio, then -1 is returned. This is the case when even a | ||
| completely opaque foreground color can't produce a high enough contrast ratio. For example, light | ||
| grey on white will have a low contrast ratio for any alpha value assigned to the light grey. | ||
| @param color The foreground color (alpha ignored). | ||
| @param backgroundColor The background color (assumed to be opaque). | ||
| @param minContrastRatio The minimum allowable contrast ratio. | ||
| @return The minimum acceptable alpha of the foreground color, or -1 if no such alpha exists. | ||
| */ | ||
| CGFloat MDFMinAlphaOfColorOnBackgroundColor(UIColor *color, | ||
| UIColor *backgroundColor, | ||
| CGFloat minContrastRatio); | ||
|
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| #if defined __cplusplus | ||
| } // extern "C" | ||
| #endif |
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...rences/v34.0.1.Debug/MDFTextAccessibility.framework/PrivateHeaders/MDFImageCalculations.h
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| /* | ||
| Copyright 2016-present Google Inc. All Rights Reserved. | ||
| 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. | ||
| */ | ||
|
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| #import <UIKit/UIKit.h> | ||
|
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| #if defined(__cplusplus) | ||
| extern "C" { | ||
| #endif | ||
|
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| /** | ||
| Return the average color of an image in a particular region. | ||
| The region will be intersected with the image's bounds. If the resulting region is empty (or the | ||
| input region was null) then this function returns nil. | ||
| @param image The image to examine. | ||
| @param region The region of the image to average, or CGRectInfinite for the entire image. | ||
| @return The average color, or nil if the region was invalid. | ||
| */ | ||
| UIColor *MDFAverageColorOfOpaqueImage(UIImage *image, CGRect region); | ||
|
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| #if defined __cplusplus | ||
| } // extern "C" | ||
| #endif |
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