html2canvas-pro
Version:
Screenshots with JavaScript. Next generation!
189 lines • 12 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.calculateBackgroundRepeatPath = exports.getBackgroundValueForIndex = exports.calculateBackgroundSize = exports.isAuto = exports.calculateBackgroundRendering = exports.calculateBackgroundPaintingArea = exports.calculateBackgroundPositioningArea = void 0;
var background_size_1 = require("../css/property-descriptors/background-size");
var vector_1 = require("./vector");
var length_percentage_1 = require("../css/types/length-percentage");
var parser_1 = require("../css/syntax/parser");
var box_sizing_1 = require("./box-sizing");
var calculateBackgroundPositioningArea = function (backgroundOrigin, element) {
if (backgroundOrigin === 0 /* BACKGROUND_ORIGIN.BORDER_BOX */) {
return element.bounds;
}
if (backgroundOrigin === 2 /* BACKGROUND_ORIGIN.CONTENT_BOX */) {
return (0, box_sizing_1.contentBox)(element);
}
return (0, box_sizing_1.paddingBox)(element);
};
exports.calculateBackgroundPositioningArea = calculateBackgroundPositioningArea;
var calculateBackgroundPaintingArea = function (backgroundClip, element) {
if (backgroundClip === 0 /* BACKGROUND_CLIP.BORDER_BOX */) {
return element.bounds;
}
if (backgroundClip === 2 /* BACKGROUND_CLIP.CONTENT_BOX */) {
return (0, box_sizing_1.contentBox)(element);
}
return (0, box_sizing_1.paddingBox)(element);
};
exports.calculateBackgroundPaintingArea = calculateBackgroundPaintingArea;
var calculateBackgroundRendering = function (container, index, intrinsicSize) {
var backgroundPositioningArea = (0, exports.calculateBackgroundPositioningArea)((0, exports.getBackgroundValueForIndex)(container.styles.backgroundOrigin, index), container);
var backgroundPaintingArea = (0, exports.calculateBackgroundPaintingArea)((0, exports.getBackgroundValueForIndex)(container.styles.backgroundClip, index), container);
var backgroundImageSize = (0, exports.calculateBackgroundSize)((0, exports.getBackgroundValueForIndex)(container.styles.backgroundSize, index), intrinsicSize, backgroundPositioningArea);
var sizeWidth = backgroundImageSize[0], sizeHeight = backgroundImageSize[1];
var position = (0, length_percentage_1.getAbsoluteValueForTuple)((0, exports.getBackgroundValueForIndex)(container.styles.backgroundPosition, index), backgroundPositioningArea.width - sizeWidth, backgroundPositioningArea.height - sizeHeight);
var path = (0, exports.calculateBackgroundRepeatPath)((0, exports.getBackgroundValueForIndex)(container.styles.backgroundRepeat, index), position, backgroundImageSize, backgroundPositioningArea, backgroundPaintingArea);
var offsetX = Math.round(backgroundPositioningArea.left + position[0]);
var offsetY = Math.round(backgroundPositioningArea.top + position[1]);
sizeWidth = Math.max(1, sizeWidth);
sizeHeight = Math.max(1, sizeHeight);
return [path, offsetX, offsetY, sizeWidth, sizeHeight];
};
exports.calculateBackgroundRendering = calculateBackgroundRendering;
var isAuto = function (token) { return (0, parser_1.isIdentToken)(token) && token.value === background_size_1.BACKGROUND_SIZE.AUTO; };
exports.isAuto = isAuto;
var hasIntrinsicValue = function (value) { return typeof value === 'number'; };
var calculateBackgroundSize = function (size, _a, bounds) {
var intrinsicWidth = _a[0], intrinsicHeight = _a[1], intrinsicProportion = _a[2];
var first = size[0], second = size[1];
if (!first) {
return [0, 0];
}
if ((0, length_percentage_1.isLengthPercentage)(first) && second && (0, length_percentage_1.isLengthPercentage)(second)) {
return [(0, length_percentage_1.getAbsoluteValue)(first, bounds.width), (0, length_percentage_1.getAbsoluteValue)(second, bounds.height)];
}
var hasIntrinsicProportion = hasIntrinsicValue(intrinsicProportion);
if ((0, parser_1.isIdentToken)(first) && (first.value === background_size_1.BACKGROUND_SIZE.CONTAIN || first.value === background_size_1.BACKGROUND_SIZE.COVER)) {
if (hasIntrinsicValue(intrinsicProportion)) {
var targetRatio = bounds.width / bounds.height;
return targetRatio < intrinsicProportion !== (first.value === background_size_1.BACKGROUND_SIZE.COVER)
? [bounds.width, bounds.width / intrinsicProportion]
: [bounds.height * intrinsicProportion, bounds.height];
}
return [bounds.width, bounds.height];
}
var hasIntrinsicWidth = hasIntrinsicValue(intrinsicWidth);
var hasIntrinsicHeight = hasIntrinsicValue(intrinsicHeight);
var hasIntrinsicDimensions = hasIntrinsicWidth || hasIntrinsicHeight;
// If the background-size is auto or auto auto:
if ((0, exports.isAuto)(first) && (!second || (0, exports.isAuto)(second))) {
// If the image has both horizontal and vertical intrinsic dimensions, it's rendered at that size.
if (hasIntrinsicWidth && hasIntrinsicHeight) {
return [intrinsicWidth, intrinsicHeight];
}
// If the image has no intrinsic dimensions and has no intrinsic proportions,
// it's rendered at the size of the background positioning area.
if (!hasIntrinsicProportion && !hasIntrinsicDimensions) {
return [bounds.width, bounds.height];
}
// TODO If the image has no intrinsic dimensions but has intrinsic proportions, it's rendered as if contain had been specified instead.
// If the image has only one intrinsic dimension and has intrinsic proportions, it's rendered at the size corresponding to that one dimension.
// The other dimension is computed using the specified dimension and the intrinsic proportions.
if (hasIntrinsicDimensions && hasIntrinsicProportion) {
var width_1 = hasIntrinsicWidth
? intrinsicWidth
: intrinsicHeight * intrinsicProportion;
var height_1 = hasIntrinsicHeight
? intrinsicHeight
: intrinsicWidth / intrinsicProportion;
return [width_1, height_1];
}
// If the image has only one intrinsic dimension but has no intrinsic proportions,
// it's rendered using the specified dimension and the other dimension of the background positioning area.
var width_2 = hasIntrinsicWidth ? intrinsicWidth : bounds.width;
var height_2 = hasIntrinsicHeight ? intrinsicHeight : bounds.height;
return [width_2, height_2];
}
// If the image has intrinsic proportions, it's stretched to the specified dimension.
// The unspecified dimension is computed using the specified dimension and the intrinsic proportions.
if (hasIntrinsicProportion) {
var width_3 = 0;
var height_3 = 0;
if ((0, length_percentage_1.isLengthPercentage)(first)) {
width_3 = (0, length_percentage_1.getAbsoluteValue)(first, bounds.width);
}
else if ((0, length_percentage_1.isLengthPercentage)(second)) {
height_3 = (0, length_percentage_1.getAbsoluteValue)(second, bounds.height);
}
if ((0, exports.isAuto)(first)) {
width_3 = height_3 * intrinsicProportion;
}
else if (!second || (0, exports.isAuto)(second)) {
height_3 = width_3 / intrinsicProportion;
}
return [width_3, height_3];
}
// If the image has no intrinsic proportions, it's stretched to the specified dimension.
// The unspecified dimension is computed using the image's corresponding intrinsic dimension,
// if there is one. If there is no such intrinsic dimension,
// it becomes the corresponding dimension of the background positioning area.
var width = null;
var height = null;
if ((0, length_percentage_1.isLengthPercentage)(first)) {
width = (0, length_percentage_1.getAbsoluteValue)(first, bounds.width);
}
else if (second && (0, length_percentage_1.isLengthPercentage)(second)) {
height = (0, length_percentage_1.getAbsoluteValue)(second, bounds.height);
}
if (width !== null && (!second || (0, exports.isAuto)(second))) {
height =
hasIntrinsicWidth && hasIntrinsicHeight
? (width / intrinsicWidth) * intrinsicHeight
: bounds.height;
}
if (height !== null && (0, exports.isAuto)(first)) {
width =
hasIntrinsicWidth && hasIntrinsicHeight
? (height / intrinsicHeight) * intrinsicWidth
: bounds.width;
}
if (width !== null && height !== null) {
return [width, height];
}
throw new Error("Unable to calculate background-size for element");
};
exports.calculateBackgroundSize = calculateBackgroundSize;
var getBackgroundValueForIndex = function (values, index) {
var value = values[index];
if (typeof value === 'undefined') {
return values[0];
}
return value;
};
exports.getBackgroundValueForIndex = getBackgroundValueForIndex;
var calculateBackgroundRepeatPath = function (repeat, _a, _b, backgroundPositioningArea, backgroundPaintingArea) {
var x = _a[0], y = _a[1];
var width = _b[0], height = _b[1];
switch (repeat) {
case 2 /* BACKGROUND_REPEAT.REPEAT_X */:
return [
new vector_1.Vector(Math.round(backgroundPositioningArea.left), Math.round(backgroundPositioningArea.top + y)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + backgroundPositioningArea.width), Math.round(backgroundPositioningArea.top + y)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + backgroundPositioningArea.width), Math.round(height + backgroundPositioningArea.top + y)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left), Math.round(height + backgroundPositioningArea.top + y))
];
case 3 /* BACKGROUND_REPEAT.REPEAT_Y */:
return [
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.height + backgroundPositioningArea.top)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.height + backgroundPositioningArea.top))
];
case 1 /* BACKGROUND_REPEAT.NO_REPEAT */:
return [
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top + y)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top + y)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x + width), Math.round(backgroundPositioningArea.top + y + height)),
new vector_1.Vector(Math.round(backgroundPositioningArea.left + x), Math.round(backgroundPositioningArea.top + y + height))
];
default:
return [
new vector_1.Vector(Math.round(backgroundPaintingArea.left), Math.round(backgroundPaintingArea.top)),
new vector_1.Vector(Math.round(backgroundPaintingArea.left + backgroundPaintingArea.width), Math.round(backgroundPaintingArea.top)),
new vector_1.Vector(Math.round(backgroundPaintingArea.left + backgroundPaintingArea.width), Math.round(backgroundPaintingArea.height + backgroundPaintingArea.top)),
new vector_1.Vector(Math.round(backgroundPaintingArea.left), Math.round(backgroundPaintingArea.height + backgroundPaintingArea.top))
];
}
};
exports.calculateBackgroundRepeatPath = calculateBackgroundRepeatPath;
//# sourceMappingURL=background.js.map