/**
 * Assigns all attribute values to the provided element via the inferred renderer.
 *
 * This function accepts two forms of attribute entries:
 *
 * default: (key, value):
 *  attrs = [key1, value1, key2, value2]
 *
 * namespaced: (NAMESPACE_MARKER, uri, name, value)
 *  attrs = [NAMESPACE_MARKER, uri, name, value, NAMESPACE_MARKER, uri, name, value]
 *
 * The `attrs` array can contain a mix of both the default and namespaced entries.
 * The "default" values are set without a marker, but if the function comes across
 * a marker value then it will attempt to set a namespaced value. If the marker is
 * not of a namespaced value then the function will quit and return the index value
 * where it stopped during the iteration of the attrs array.
 *
 * See [AttributeMarker] to understand what the namespace marker value is.
 *
 * Note that this instruction does not support assigning style and class values to
 * an element. See `elementStart` and `elementHostAttrs` to learn how styling values
 * are applied to an element.
 * @param renderer The renderer to be used
 * @param native The element that the attributes will be assigned to
 * @param attrs The attribute array of values that will be assigned to the element
 * @returns the index value that was last accessed in the attributes array
 */
export function setUpAttributes(renderer, native, attrs) {
    let i = 0;
    while (i < attrs.length) {
        const value = attrs[i];
        if (typeof value === 'number') {
            // only namespaces are supported. Other value types (such as style/class
            // entries) are not supported in this function.
            if (value !== 0 /* AttributeMarker.NamespaceURI */) {
                break;
            }
            // we just landed on the marker value ... therefore
            // we should skip to the next entry
            i++;
            const namespaceURI = attrs[i++];
            const attrName = attrs[i++];
            const attrVal = attrs[i++];
            ngDevMode && ngDevMode.rendererSetAttribute++;
            renderer.setAttribute(native, attrName, attrVal, namespaceURI);
        }
        else {
            // attrName is string;
            const attrName = value;
            const attrVal = attrs[++i];
            // Standard attributes
            ngDevMode && ngDevMode.rendererSetAttribute++;
            if (isAnimationProp(attrName)) {
                renderer.setProperty(native, attrName, attrVal);
            }
            else {
                renderer.setAttribute(native, attrName, attrVal);
            }
            i++;
        }
    }
    // another piece of code may iterate over the same attributes array. Therefore
    // it may be helpful to return the exact spot where the attributes array exited
    // whether by running into an unsupported marker or if all the static values were
    // iterated over.
    return i;
}
/**
 * Test whether the given value is a marker that indicates that the following
 * attribute values in a `TAttributes` array are only the names of attributes,
 * and not name-value pairs.
 * @param marker The attribute marker to test.
 * @returns true if the marker is a "name-only" marker (e.g. `Bindings`, `Template` or `I18n`).
 */
export function isNameOnlyAttributeMarker(marker) {
    return marker === 3 /* AttributeMarker.Bindings */ || marker === 4 /* AttributeMarker.Template */ ||
        marker === 6 /* AttributeMarker.I18n */;
}
export function isAnimationProp(name) {
    // Perf note: accessing charCodeAt to check for the first character of a string is faster as
    // compared to accessing a character at index 0 (ex. name[0]). The main reason for this is that
    // charCodeAt doesn't allocate memory to return a substring.
    return name.charCodeAt(0) === 64 /* CharCode.AT_SIGN */;
}
/**
 * Merges `src` `TAttributes` into `dst` `TAttributes` removing any duplicates in the process.
 *
 * This merge function keeps the order of attrs same.
 *
 * @param dst Location of where the merged `TAttributes` should end up.
 * @param src `TAttributes` which should be appended to `dst`
 */
export function mergeHostAttrs(dst, src) {
    if (src === null || src.length === 0) {
        // do nothing
    }
    else if (dst === null || dst.length === 0) {
        // We have source, but dst is empty, just make a copy.
        dst = src.slice();
    }
    else {
        let srcMarker = -1 /* AttributeMarker.ImplicitAttributes */;
        for (let i = 0; i < src.length; i++) {
            const item = src[i];
            if (typeof item === 'number') {
                srcMarker = item;
            }
            else {
                if (srcMarker === 0 /* AttributeMarker.NamespaceURI */) {
                    // Case where we need to consume `key1`, `key2`, `value` items.
                }
                else if (srcMarker === -1 /* AttributeMarker.ImplicitAttributes */ ||
                    srcMarker === 2 /* AttributeMarker.Styles */) {
                    // Case where we have to consume `key1` and `value` only.
                    mergeHostAttribute(dst, srcMarker, item, null, src[++i]);
                }
                else {
                    // Case where we have to consume `key1` only.
                    mergeHostAttribute(dst, srcMarker, item, null, null);
                }
            }
        }
    }
    return dst;
}
/**
 * Append `key`/`value` to existing `TAttributes` taking region marker and duplicates into account.
 *
 * @param dst `TAttributes` to append to.
 * @param marker Region where the `key`/`value` should be added.
 * @param key1 Key to add to `TAttributes`
 * @param key2 Key to add to `TAttributes` (in case of `AttributeMarker.NamespaceURI`)
 * @param value Value to add or to overwrite to `TAttributes` Only used if `marker` is not Class.
 */
export function mergeHostAttribute(dst, marker, key1, key2, value) {
    let i = 0;
    // Assume that new markers will be inserted at the end.
    let markerInsertPosition = dst.length;
    // scan until correct type.
    if (marker === -1 /* AttributeMarker.ImplicitAttributes */) {
        markerInsertPosition = -1;
    }
    else {
        while (i < dst.length) {
            const dstValue = dst[i++];
            if (typeof dstValue === 'number') {
                if (dstValue === marker) {
                    markerInsertPosition = -1;
                    break;
                }
                else if (dstValue > marker) {
                    // We need to save this as we want the markers to be inserted in specific order.
                    markerInsertPosition = i - 1;
                    break;
                }
            }
        }
    }
    // search until you find place of insertion
    while (i < dst.length) {
        const item = dst[i];
        if (typeof item === 'number') {
            // since `i` started as the index after the marker, we did not find it if we are at the next
            // marker
            break;
        }
        else if (item === key1) {
            // We already have same token
            if (key2 === null) {
                if (value !== null) {
                    dst[i + 1] = value;
                }
                return;
            }
            else if (key2 === dst[i + 1]) {
                dst[i + 2] = value;
                return;
            }
        }
        // Increment counter.
        i++;
        if (key2 !== null)
            i++;
        if (value !== null)
            i++;
    }
    // insert at location.
    if (markerInsertPosition !== -1) {
        dst.splice(markerInsertPosition, 0, marker);
        i = markerInsertPosition + 1;
    }
    dst.splice(i++, 0, key1);
    if (key2 !== null) {
        dst.splice(i++, 0, key2);
    }
    if (value !== null) {
        dst.splice(i++, 0, value);
    }
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {CharCode} from '../../util/char_code';\nimport {AttributeMarker, TAttributes} from '../interfaces/node';\nimport {CssSelector} from '../interfaces/projection';\nimport {Renderer} from '../interfaces/renderer';\nimport {RElement} from '../interfaces/renderer_dom';\n\n\n\n/**\n * Assigns all attribute values to the provided element via the inferred renderer.\n *\n * This function accepts two forms of attribute entries:\n *\n * default: (key, value):\n *  attrs = [key1, value1, key2, value2]\n *\n * namespaced: (NAMESPACE_MARKER, uri, name, value)\n *  attrs = [NAMESPACE_MARKER, uri, name, value, NAMESPACE_MARKER, uri, name, value]\n *\n * The `attrs` array can contain a mix of both the default and namespaced entries.\n * The \"default\" values are set without a marker, but if the function comes across\n * a marker value then it will attempt to set a namespaced value. If the marker is\n * not of a namespaced value then the function will quit and return the index value\n * where it stopped during the iteration of the attrs array.\n *\n * See [AttributeMarker] to understand what the namespace marker value is.\n *\n * Note that this instruction does not support assigning style and class values to\n * an element. See `elementStart` and `elementHostAttrs` to learn how styling values\n * are applied to an element.\n * @param renderer The renderer to be used\n * @param native The element that the attributes will be assigned to\n * @param attrs The attribute array of values that will be assigned to the element\n * @returns the index value that was last accessed in the attributes array\n */\nexport function setUpAttributes(renderer: Renderer, native: RElement, attrs: TAttributes): number {\n  let i = 0;\n  while (i < attrs.length) {\n    const value = attrs[i];\n    if (typeof value === 'number') {\n      // only namespaces are supported. Other value types (such as style/class\n      // entries) are not supported in this function.\n      if (value !== AttributeMarker.NamespaceURI) {\n        break;\n      }\n\n      // we just landed on the marker value ... therefore\n      // we should skip to the next entry\n      i++;\n\n      const namespaceURI = attrs[i++] as string;\n      const attrName = attrs[i++] as string;\n      const attrVal = attrs[i++] as string;\n      ngDevMode && ngDevMode.rendererSetAttribute++;\n      renderer.setAttribute(native, attrName, attrVal, namespaceURI);\n    } else {\n      // attrName is string;\n      const attrName = value as string;\n      const attrVal = attrs[++i];\n      // Standard attributes\n      ngDevMode && ngDevMode.rendererSetAttribute++;\n      if (isAnimationProp(attrName)) {\n        renderer.setProperty(native, attrName, attrVal);\n      } else {\n        renderer.setAttribute(native, attrName, attrVal as string);\n      }\n      i++;\n    }\n  }\n\n  // another piece of code may iterate over the same attributes array. Therefore\n  // it may be helpful to return the exact spot where the attributes array exited\n  // whether by running into an unsupported marker or if all the static values were\n  // iterated over.\n  return i;\n}\n\n/**\n * Test whether the given value is a marker that indicates that the following\n * attribute values in a `TAttributes` array are only the names of attributes,\n * and not name-value pairs.\n * @param marker The attribute marker to test.\n * @returns true if the marker is a \"name-only\" marker (e.g. `Bindings`, `Template` or `I18n`).\n */\nexport function isNameOnlyAttributeMarker(marker: string|AttributeMarker|CssSelector) {\n  return marker === AttributeMarker.Bindings || marker === AttributeMarker.Template ||\n      marker === AttributeMarker.I18n;\n}\n\nexport function isAnimationProp(name: string): boolean {\n  // Perf note: accessing charCodeAt to check for the first character of a string is faster as\n  // compared to accessing a character at index 0 (ex. name[0]). The main reason for this is that\n  // charCodeAt doesn't allocate memory to return a substring.\n  return name.charCodeAt(0) === CharCode.AT_SIGN;\n}\n\n/**\n * Merges `src` `TAttributes` into `dst` `TAttributes` removing any duplicates in the process.\n *\n * This merge function keeps the order of attrs same.\n *\n * @param dst Location of where the merged `TAttributes` should end up.\n * @param src `TAttributes` which should be appended to `dst`\n */\nexport function mergeHostAttrs(dst: TAttributes|null, src: TAttributes|null): TAttributes|null {\n  if (src === null || src.length === 0) {\n    // do nothing\n  } else if (dst === null || dst.length === 0) {\n    // We have source, but dst is empty, just make a copy.\n    dst = src.slice();\n  } else {\n    let srcMarker: AttributeMarker = AttributeMarker.ImplicitAttributes;\n    for (let i = 0; i < src.length; i++) {\n      const item = src[i];\n      if (typeof item === 'number') {\n        srcMarker = item;\n      } else {\n        if (srcMarker === AttributeMarker.NamespaceURI) {\n          // Case where we need to consume `key1`, `key2`, `value` items.\n        } else if (\n            srcMarker === AttributeMarker.ImplicitAttributes ||\n            srcMarker === AttributeMarker.Styles) {\n          // Case where we have to consume `key1` and `value` only.\n          mergeHostAttribute(dst, srcMarker, item as string, null, src[++i] as string);\n        } else {\n          // Case where we have to consume `key1` only.\n          mergeHostAttribute(dst, srcMarker, item as string, null, null);\n        }\n      }\n    }\n  }\n  return dst;\n}\n\n/**\n * Append `key`/`value` to existing `TAttributes` taking region marker and duplicates into account.\n *\n * @param dst `TAttributes` to append to.\n * @param marker Region where the `key`/`value` should be added.\n * @param key1 Key to add to `TAttributes`\n * @param key2 Key to add to `TAttributes` (in case of `AttributeMarker.NamespaceURI`)\n * @param value Value to add or to overwrite to `TAttributes` Only used if `marker` is not Class.\n */\nexport function mergeHostAttribute(\n    dst: TAttributes, marker: AttributeMarker, key1: string, key2: string|null,\n    value: string|null): void {\n  let i = 0;\n  // Assume that new markers will be inserted at the end.\n  let markerInsertPosition = dst.length;\n  // scan until correct type.\n  if (marker === AttributeMarker.ImplicitAttributes) {\n    markerInsertPosition = -1;\n  } else {\n    while (i < dst.length) {\n      const dstValue = dst[i++];\n      if (typeof dstValue === 'number') {\n        if (dstValue === marker) {\n          markerInsertPosition = -1;\n          break;\n        } else if (dstValue > marker) {\n          // We need to save this as we want the markers to be inserted in specific order.\n          markerInsertPosition = i - 1;\n          break;\n        }\n      }\n    }\n  }\n\n  // search until you find place of insertion\n  while (i < dst.length) {\n    const item = dst[i];\n    if (typeof item === 'number') {\n      // since `i` started as the index after the marker, we did not find it if we are at the next\n      // marker\n      break;\n    } else if (item === key1) {\n      // We already have same token\n      if (key2 === null) {\n        if (value !== null) {\n          dst[i + 1] = value;\n        }\n        return;\n      } else if (key2 === dst[i + 1]) {\n        dst[i + 2] = value!;\n        return;\n      }\n    }\n    // Increment counter.\n    i++;\n    if (key2 !== null) i++;\n    if (value !== null) i++;\n  }\n\n  // insert at location.\n  if (markerInsertPosition !== -1) {\n    dst.splice(markerInsertPosition, 0, marker);\n    i = markerInsertPosition + 1;\n  }\n  dst.splice(i++, 0, key1);\n  if (key2 !== null) {\n    dst.splice(i++, 0, key2);\n  }\n  if (value !== null) {\n    dst.splice(i++, 0, value);\n  }\n}\n"]}