187 lines
No EOL
11 KiB
JavaScript
187 lines
No EOL
11 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.calculateBackgroundRepeatPath = exports.getBackgroundValueForIndex = exports.calculateBackgroundSize = exports.isAuto = exports.calculateBackgroundRendering = exports.calculateBackgroundPaintingArea = exports.calculateBackgroundPositioningArea = void 0;
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var background_size_1 = require("../css/property-descriptors/background-size");
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var vector_1 = require("./vector");
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var length_percentage_1 = require("../css/types/length-percentage");
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var parser_1 = require("../css/syntax/parser");
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var box_sizing_1 = require("./box-sizing");
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var calculateBackgroundPositioningArea = function (backgroundOrigin, element) {
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if (backgroundOrigin === 0 /* BORDER_BOX */) {
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return element.bounds;
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}
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if (backgroundOrigin === 2 /* CONTENT_BOX */) {
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return box_sizing_1.contentBox(element);
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}
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return box_sizing_1.paddingBox(element);
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};
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exports.calculateBackgroundPositioningArea = calculateBackgroundPositioningArea;
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var calculateBackgroundPaintingArea = function (backgroundClip, element) {
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if (backgroundClip === 0 /* BORDER_BOX */) {
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return element.bounds;
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}
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if (backgroundClip === 2 /* CONTENT_BOX */) {
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return box_sizing_1.contentBox(element);
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}
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return box_sizing_1.paddingBox(element);
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};
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exports.calculateBackgroundPaintingArea = calculateBackgroundPaintingArea;
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var calculateBackgroundRendering = function (container, index, intrinsicSize) {
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var backgroundPositioningArea = exports.calculateBackgroundPositioningArea(exports.getBackgroundValueForIndex(container.styles.backgroundOrigin, index), container);
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var backgroundPaintingArea = exports.calculateBackgroundPaintingArea(exports.getBackgroundValueForIndex(container.styles.backgroundClip, index), container);
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var backgroundImageSize = exports.calculateBackgroundSize(exports.getBackgroundValueForIndex(container.styles.backgroundSize, index), intrinsicSize, backgroundPositioningArea);
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var sizeWidth = backgroundImageSize[0], sizeHeight = backgroundImageSize[1];
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var position = length_percentage_1.getAbsoluteValueForTuple(exports.getBackgroundValueForIndex(container.styles.backgroundPosition, index), backgroundPositioningArea.width - sizeWidth, backgroundPositioningArea.height - sizeHeight);
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var path = exports.calculateBackgroundRepeatPath(exports.getBackgroundValueForIndex(container.styles.backgroundRepeat, index), position, backgroundImageSize, backgroundPositioningArea, backgroundPaintingArea);
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var offsetX = Math.round(backgroundPositioningArea.left + position[0]);
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var offsetY = Math.round(backgroundPositioningArea.top + position[1]);
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return [path, offsetX, offsetY, sizeWidth, sizeHeight];
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};
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exports.calculateBackgroundRendering = calculateBackgroundRendering;
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var isAuto = function (token) { return parser_1.isIdentToken(token) && token.value === background_size_1.BACKGROUND_SIZE.AUTO; };
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exports.isAuto = isAuto;
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var hasIntrinsicValue = function (value) { return typeof value === 'number'; };
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var calculateBackgroundSize = function (size, _a, bounds) {
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var intrinsicWidth = _a[0], intrinsicHeight = _a[1], intrinsicProportion = _a[2];
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var first = size[0], second = size[1];
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if (!first) {
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return [0, 0];
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}
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if (length_percentage_1.isLengthPercentage(first) && second && length_percentage_1.isLengthPercentage(second)) {
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return [length_percentage_1.getAbsoluteValue(first, bounds.width), length_percentage_1.getAbsoluteValue(second, bounds.height)];
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}
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var hasIntrinsicProportion = hasIntrinsicValue(intrinsicProportion);
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if (parser_1.isIdentToken(first) && (first.value === background_size_1.BACKGROUND_SIZE.CONTAIN || first.value === background_size_1.BACKGROUND_SIZE.COVER)) {
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if (hasIntrinsicValue(intrinsicProportion)) {
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var targetRatio = bounds.width / bounds.height;
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return targetRatio < intrinsicProportion !== (first.value === background_size_1.BACKGROUND_SIZE.COVER)
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? [bounds.width, bounds.width / intrinsicProportion]
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: [bounds.height * intrinsicProportion, bounds.height];
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}
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return [bounds.width, bounds.height];
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}
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var hasIntrinsicWidth = hasIntrinsicValue(intrinsicWidth);
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var hasIntrinsicHeight = hasIntrinsicValue(intrinsicHeight);
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var hasIntrinsicDimensions = hasIntrinsicWidth || hasIntrinsicHeight;
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// If the background-size is auto or auto auto:
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if (exports.isAuto(first) && (!second || exports.isAuto(second))) {
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// If the image has both horizontal and vertical intrinsic dimensions, it's rendered at that size.
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if (hasIntrinsicWidth && hasIntrinsicHeight) {
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return [intrinsicWidth, intrinsicHeight];
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}
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// If the image has no intrinsic dimensions and has no intrinsic proportions,
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// it's rendered at the size of the background positioning area.
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if (!hasIntrinsicProportion && !hasIntrinsicDimensions) {
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return [bounds.width, bounds.height];
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}
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// TODO If the image has no intrinsic dimensions but has intrinsic proportions, it's rendered as if contain had been specified instead.
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// If the image has only one intrinsic dimension and has intrinsic proportions, it's rendered at the size corresponding to that one dimension.
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// The other dimension is computed using the specified dimension and the intrinsic proportions.
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if (hasIntrinsicDimensions && hasIntrinsicProportion) {
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var width_1 = hasIntrinsicWidth
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? intrinsicWidth
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: intrinsicHeight * intrinsicProportion;
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var height_1 = hasIntrinsicHeight
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? intrinsicHeight
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: intrinsicWidth / intrinsicProportion;
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return [width_1, height_1];
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}
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// If the image has only one intrinsic dimension but has no intrinsic proportions,
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// it's rendered using the specified dimension and the other dimension of the background positioning area.
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var width_2 = hasIntrinsicWidth ? intrinsicWidth : bounds.width;
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var height_2 = hasIntrinsicHeight ? intrinsicHeight : bounds.height;
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return [width_2, height_2];
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}
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// If the image has intrinsic proportions, it's stretched to the specified dimension.
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// The unspecified dimension is computed using the specified dimension and the intrinsic proportions.
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if (hasIntrinsicProportion) {
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var width_3 = 0;
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var height_3 = 0;
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if (length_percentage_1.isLengthPercentage(first)) {
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width_3 = length_percentage_1.getAbsoluteValue(first, bounds.width);
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}
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else if (length_percentage_1.isLengthPercentage(second)) {
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height_3 = length_percentage_1.getAbsoluteValue(second, bounds.height);
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}
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if (exports.isAuto(first)) {
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width_3 = height_3 * intrinsicProportion;
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}
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else if (!second || exports.isAuto(second)) {
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height_3 = width_3 / intrinsicProportion;
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}
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return [width_3, height_3];
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}
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// If the image has no intrinsic proportions, it's stretched to the specified dimension.
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// The unspecified dimension is computed using the image's corresponding intrinsic dimension,
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// if there is one. If there is no such intrinsic dimension,
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// it becomes the corresponding dimension of the background positioning area.
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var width = null;
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var height = null;
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if (length_percentage_1.isLengthPercentage(first)) {
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width = length_percentage_1.getAbsoluteValue(first, bounds.width);
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}
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else if (second && length_percentage_1.isLengthPercentage(second)) {
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height = length_percentage_1.getAbsoluteValue(second, bounds.height);
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}
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if (width !== null && (!second || exports.isAuto(second))) {
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height =
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hasIntrinsicWidth && hasIntrinsicHeight
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? (width / intrinsicWidth) * intrinsicHeight
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: bounds.height;
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}
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if (height !== null && exports.isAuto(first)) {
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width =
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hasIntrinsicWidth && hasIntrinsicHeight
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? (height / intrinsicHeight) * intrinsicWidth
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: bounds.width;
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}
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if (width !== null && height !== null) {
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return [width, height];
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}
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throw new Error("Unable to calculate background-size for element");
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};
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exports.calculateBackgroundSize = calculateBackgroundSize;
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var getBackgroundValueForIndex = function (values, index) {
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var value = values[index];
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if (typeof value === 'undefined') {
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return values[0];
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}
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return value;
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};
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exports.getBackgroundValueForIndex = getBackgroundValueForIndex;
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var calculateBackgroundRepeatPath = function (repeat, _a, _b, backgroundPositioningArea, backgroundPaintingArea) {
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var x = _a[0], y = _a[1];
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var width = _b[0], height = _b[1];
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switch (repeat) {
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case 2 /* REPEAT_X */:
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return [
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new vector_1.Vector(Math.round(backgroundPositioningArea.left), Math.round(backgroundPositioningArea.top + y)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + backgroundPositioningArea.width), Math.round(backgroundPositioningArea.top + y)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + backgroundPositioningArea.width), Math.round(height + backgroundPositioningArea.top + y)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left), Math.round(height + backgroundPositioningArea.top + y))
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];
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case 3 /* REPEAT_Y */:
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return [
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.height + backgroundPositioningArea.top)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.height + backgroundPositioningArea.top))
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];
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case 1 /* NO_REPEAT */:
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return [
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top + y)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top + y)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top + y + height)),
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new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top + y + height))
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];
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default:
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return [
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new vector_1.Vector(Math.round(backgroundPaintingArea.left), Math.round(backgroundPaintingArea.top)),
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new vector_1.Vector(Math.round(backgroundPaintingArea.left + backgroundPaintingArea.width), Math.round(backgroundPaintingArea.top)),
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new vector_1.Vector(Math.round(backgroundPaintingArea.left + backgroundPaintingArea.width), Math.round(backgroundPaintingArea.height + backgroundPaintingArea.top)),
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new vector_1.Vector(Math.round(backgroundPaintingArea.left), Math.round(backgroundPaintingArea.height + backgroundPaintingArea.top))
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];
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}
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};
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exports.calculateBackgroundRepeatPath = calculateBackgroundRepeatPath;
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//# sourceMappingURL=background.js.map
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