/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.text.Cue');
goog.provide('shaka.text.CueRegion');
goog.require('shaka.util.ArrayUtils');
/**
* @implements {shaka.extern.Cue}
* @export
*/
shaka.text.Cue = class {
/**
* @param {number} startTime
* @param {number} endTime
* @param {string} payload
*/
constructor(startTime, endTime, payload) {
const Cue = shaka.text.Cue;
/**
* @override
* @exportInterface
*/
this.startTime = startTime;
/**
* @override
* @exportInterface
*/
this.direction = Cue.direction.HORIZONTAL_LEFT_TO_RIGHT;
/**
* @override
* @exportInterface
*/
this.endTime = endTime;
// The explicit type here is to work around an apparent compiler bug where
// the compiler seems to get confused about the type. Since we are
// overriding the interface type, it shouldn't be necessary to do this.
// Compiler version 20200517.
/**
* @override
* @exportInterface
* @type {string}
*/
this.payload = payload;
/**
* @override
* @exportInterface
*/
this.region = new shaka.text.CueRegion();
/**
* @override
* @exportInterface
*/
this.position = null;
/**
* @override
* @exportInterface
*/
this.positionAlign = Cue.positionAlign.AUTO;
/**
* @override
* @exportInterface
*/
this.size = 0;
/**
* @override
* @exportInterface
*/
this.textAlign = Cue.textAlign.CENTER;
/**
* @override
* @exportInterface
*/
this.writingMode = Cue.writingMode.HORIZONTAL_TOP_TO_BOTTOM;
/**
* @override
* @exportInterface
*/
this.lineInterpretation = Cue.lineInterpretation.LINE_NUMBER;
/**
* @override
* @exportInterface
*/
this.line = null;
/**
* @override
* @exportInterface
*/
this.lineHeight = '';
/**
* Line Alignment is set to start by default.
* @override
* @exportInterface
*/
this.lineAlign = Cue.lineAlign.START;
/**
* Set the captions at the bottom of the text container by default.
* @override
* @exportInterface
*/
this.displayAlign = Cue.displayAlign.AFTER;
/**
* @override
* @exportInterface
*/
this.color = '';
/**
* @override
* @exportInterface
*/
this.backgroundColor = '';
/**
* @override
* @exportInterface
*/
this.backgroundImage = '';
/**
* @override
* @exportInterface
*/
this.border = '';
/**
* @override
* @exportInterface
*/
this.fontSize = '';
/**
* @override
* @exportInterface
*/
this.fontWeight = Cue.fontWeight.NORMAL;
/**
* @override
* @exportInterface
*/
this.fontStyle = Cue.fontStyle.NORMAL;
/**
* @override
* @exportInterface
*/
this.fontFamily = '';
/**
* @override
* @exportInterface
*/
this.letterSpacing = '';
/**
* @override
* @exportInterface
*/
this.linePadding = '';
/**
* @override
* @exportInterface
*/
this.opacity = 1;
/**
* @override
* @exportInterface
*/
this.textDecoration = [];
/**
* @override
* @exportInterface
*/
this.wrapLine = true;
/**
* @override
* @exportInterface
*/
this.id = '';
/**
* @override
* @exportInterface
*/
this.nestedCues = [];
/**
* @override
* @exportInterface
*/
this.lineBreak = false;
/**
* @override
* @exportInterface
*/
this.spacer = false;
/**
* @override
* @exportInterface
*/
this.cellResolution = {
columns: 32,
rows: 15,
};
}
/**
* @param {number} start
* @param {number} end
* @return {!shaka.text.Cue}
*/
static lineBreak(start, end) {
const cue = new shaka.text.Cue(start, end, '');
cue.lineBreak = true;
return cue;
}
/**
* Create a copy of the cue with the same properties.
* @return {!shaka.text.Cue}
* @suppress {checkTypes} since we must use [] and "in" with a struct type.
*/
clone() {
const clone = new shaka.text.Cue(0, 0, '');
for (const k in this) {
clone[k] = this[k];
// Make copies of array fields, but only one level deep. That way, if we
// change, for instance, textDecoration on the clone, we don't affect the
// original.
if (clone[k] && clone[k].constructor == Array) {
clone[k] = /** @type {!Array} */(clone[k]).slice();
}
}
return clone;
}
/**
* Check if two Cues have all the same values in all properties.
* @param {!shaka.text.Cue} cue1
* @param {!shaka.text.Cue} cue2
* @return {boolean}
* @suppress {checkTypes} since we must use [] and "in" with a struct type.
*/
static equal(cue1, cue2) {
// Compare the start time, end time and payload of the cues first for
// performance optimization. We can avoid the more expensive recursive
// checks if the top-level properties don't match.
// See: https://github.com/google/shaka-player/issues/3018
if (cue1.startTime != cue2.startTime || cue1.endTime != cue2.endTime ||
cue1.payload != cue2.payload) {
return false;
}
for (const k in cue1) {
if (k == 'startTime' || k == 'endTime' || k == 'payload') {
// Already compared.
} else if (k == 'nestedCues') {
// This uses shaka.text.Cue.equal rather than just this.equal, since
// otherwise recursing here will unbox the method and cause "this" to be
// undefined in deeper recursion.
if (!shaka.util.ArrayUtils.equal(
cue1.nestedCues, cue2.nestedCues, shaka.text.Cue.equal)) {
return false;
}
} else if (k == 'region' || k == 'cellResolution') {
for (const k2 in cue1[k]) {
if (cue1[k][k2] != cue2[k][k2]) {
return false;
}
}
} else if (Array.isArray(cue1[k])) {
if (!shaka.util.ArrayUtils.equal(cue1[k], cue2[k])) {
return false;
}
} else {
if (cue1[k] != cue2[k]) {
return false;
}
}
}
return true;
}
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.positionAlign = {
'LEFT': 'line-left',
'RIGHT': 'line-right',
'CENTER': 'center',
'AUTO': 'auto',
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.textAlign = {
'LEFT': 'left',
'RIGHT': 'right',
'CENTER': 'center',
'START': 'start',
'END': 'end',
};
/**
* Vertical alignments of the cues within their extents.
* 'BEFORE' means displaying at the top of the captions container box, 'CENTER'
* means in the middle, 'AFTER' means at the bottom.
* @enum {string}
* @export
*/
shaka.text.Cue.displayAlign = {
'BEFORE': 'before',
'CENTER': 'center',
'AFTER': 'after',
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.direction = {
'HORIZONTAL_LEFT_TO_RIGHT': 'ltr',
'HORIZONTAL_RIGHT_TO_LEFT': 'rtl',
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.writingMode = {
'HORIZONTAL_TOP_TO_BOTTOM': 'horizontal-tb',
'VERTICAL_LEFT_TO_RIGHT': 'vertical-lr',
'VERTICAL_RIGHT_TO_LEFT': 'vertical-rl',
};
/**
* @enum {number}
* @export
*/
shaka.text.Cue.lineInterpretation = {
'LINE_NUMBER': 0,
'PERCENTAGE': 1,
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.lineAlign = {
'CENTER': 'center',
'START': 'start',
'END': 'end',
};
/**
* Default text color according to
* https://w3c.github.io/webvtt/#default-text-color
* @enum {string}
* @export
*/
shaka.text.Cue.defaultTextColor = {
'white': '#FFF',
'lime': '#0F0',
'cyan': '#0FF',
'red': '#F00',
'yellow': '#FF0',
'magenta': '#F0F',
'blue': '#00F',
'black': '#000',
};
/**
* Default text background color according to
* https://w3c.github.io/webvtt/#default-text-background
* @enum {string}
* @export
*/
shaka.text.Cue.defaultTextBackgroundColor = {
'bg_white': '#FFF',
'bg_lime': '#0F0',
'bg_cyan': '#0FF',
'bg_red': '#F00',
'bg_yellow': '#FF0',
'bg_magenta': '#F0F',
'bg_blue': '#00F',
'bg_black': '#000',
};
/**
* In CSS font weight can be a number, where 400 is normal and 700 is bold.
* Use these values for the enum for consistency.
* @enum {number}
* @export
*/
shaka.text.Cue.fontWeight = {
'NORMAL': 400,
'BOLD': 700,
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.fontStyle = {
'NORMAL': 'normal',
'ITALIC': 'italic',
'OBLIQUE': 'oblique',
};
/**
* @enum {string}
* @export
*/
shaka.text.Cue.textDecoration = {
'UNDERLINE': 'underline',
'LINE_THROUGH': 'lineThrough',
'OVERLINE': 'overline',
};
/**
* @implements {shaka.extern.CueRegion}
* @struct
* @export
*/
shaka.text.CueRegion = class {
/** */
constructor() {
const CueRegion = shaka.text.CueRegion;
/**
* @override
* @exportInterface
*/
this.id = '';
/**
* @override
* @exportInterface
*/
this.viewportAnchorX = 0;
/**
* @override
* @exportInterface
*/
this.viewportAnchorY = 0;
/**
* @override
* @exportInterface
*/
this.regionAnchorX = 0;
/**
* @override
* @exportInterface
*/
this.regionAnchorY = 0;
/**
* @override
* @exportInterface
*/
this.width = 100;
/**
* @override
* @exportInterface
*/
this.height = 100;
/**
* @override
* @exportInterface
*/
this.heightUnits = CueRegion.units.PERCENTAGE;
/**
* @override
* @exportInterface
*/
this.widthUnits = CueRegion.units.PERCENTAGE;
/**
* @override
* @exportInterface
*/
this.viewportAnchorUnits = CueRegion.units.PERCENTAGE;
/**
* @override
* @exportInterface
*/
this.scroll = CueRegion.scrollMode.NONE;
}
};
/**
* @enum {number}
* @export
*/
shaka.text.CueRegion.units = {
'PX': 0,
'PERCENTAGE': 1,
'LINES': 2,
};
/**
* @enum {string}
* @export
*/
shaka.text.CueRegion.scrollMode = {
'NONE': '',
'UP': 'up',
};