import "../../../src/components/VDialog/VDialog.sass"; // Mixins

import Activatable from '../../mixins/activatable';
import Dependent from '../../mixins/dependent';
import Detachable from '../../mixins/detachable';
import Overlayable from '../../mixins/overlayable';
import Returnable from '../../mixins/returnable';
import Stackable from '../../mixins/stackable';
import Toggleable from '../../mixins/toggleable'; // Directives

import ClickOutside from '../../directives/click-outside'; // Helpers

import { convertToUnit, keyCodes } from '../../util/helpers';
import ThemeProvider from '../../util/ThemeProvider';
import mixins from '../../util/mixins';
const baseMixins = mixins(Activatable, Dependent, Detachable, Overlayable, Returnable, Stackable, Toggleable);
/* @vue/component */

export default baseMixins.extend({
  name: 'v-dialog',
  directives: {
    ClickOutside
  },
  props: {
    dark: Boolean,
    disabled: Boolean,
    fullscreen: Boolean,
    fullWidth: Boolean,
    light: Boolean,
    maxWidth: {
      type: [String, Number],
      default: 'none'
    },
    noClickAnimation: Boolean,
    origin: {
      type: String,
      default: 'center center'
    },
    persistent: Boolean,
    retainFocus: {
      type: Boolean,
      default: true
    },
    scrollable: Boolean,
    transition: {
      type: [String, Boolean],
      default: 'dialog-transition'
    },
    width: {
      type: [String, Number],
      default: 'auto'
    }
  },

  data() {
    return {
      activatedBy: null,
      animate: false,
      animateTimeout: -1,
      isActive: !!this.value,
      stackMinZIndex: 200
    };
  },

  computed: {
    classes() {
      return {
        [`v-dialog ${this.contentClass}`.trim()]: true,
        'v-dialog--active': this.isActive,
        'v-dialog--persistent': this.persistent,
        'v-dialog--fullscreen': this.fullscreen,
        'v-dialog--scrollable': this.scrollable,
        'v-dialog--animated': this.animate
      };
    },

    contentClasses() {
      return {
        'v-dialog__content': true,
        'v-dialog__content--active': this.isActive
      };
    },

    hasActivator() {
      return Boolean(!!this.$slots.activator || !!this.$scopedSlots.activator);
    }

  },
  watch: {
    isActive(val) {
      if (val) {
        this.show();
        this.hideScroll();
      } else {
        this.removeOverlay();
        this.unbind();
      }
    },

    fullscreen(val) {
      if (!this.isActive) return;

      if (val) {
        this.hideScroll();
        this.removeOverlay(false);
      } else {
        this.showScroll();
        this.genOverlay();
      }
    }

  },

  beforeMount() {
    this.$nextTick(() => {
      this.isBooted = this.isActive;
      this.isActive && this.show();
    });
  },

  beforeDestroy() {
    if (typeof window !== 'undefined') this.unbind();
  },

  methods: {
    animateClick() {
      this.animate = false; // Needed for when clicking very fast
      // outside of the dialog

      this.$nextTick(() => {
        this.animate = true;
        window.clearTimeout(this.animateTimeout);
        this.animateTimeout = window.setTimeout(() => this.animate = false, 150);
      });
    },

    closeConditional(e) {
      const target = e.target; // If the dialog content contains
      // the click event, or if the
      // dialog is not active

      if (!this.isActive || this.$refs.content.contains(target)) return false; // If we made it here, the click is outside
      // and is active. If persistent, and the
      // click is on the overlay, animate

      this.$emit('click:outside');

      if (this.persistent) {
        if (!this.noClickAnimation && this.overlay === target) this.animateClick();
        return false;
      } // close dialog if !persistent, clicked outside and we're the topmost dialog.
      // Since this should only be called in a capture event (bottom up), we shouldn't need to stop propagation


      return this.activeZIndex >= this.getMaxZIndex();
    },

    hideScroll() {
      if (this.fullscreen) {
        document.documentElement.classList.add('overflow-y-hidden');
      } else {
        Overlayable.options.methods.hideScroll.call(this);
      }
    },

    show() {
      !this.fullscreen && !this.hideOverlay && this.genOverlay();
      this.$refs.content.focus();
      this.bind();
    },

    bind() {
      window.addEventListener('focusin', this.onFocusin);
    },

    unbind() {
      window.removeEventListener('focusin', this.onFocusin);
    },

    onKeydown(e) {
      if (e.keyCode === keyCodes.esc && !this.getOpenDependents().length) {
        if (!this.persistent) {
          this.isActive = false;
          const activator = this.getActivator();
          this.$nextTick(() => activator && activator.focus());
        } else if (!this.noClickAnimation) {
          this.animateClick();
        }
      }

      this.$emit('keydown', e);
    },

    onFocusin(e) {
      if (!e || !this.retainFocus) return;
      const target = e.target;

      if (!!target && // It isn't the document or the dialog body
      ![document, this.$refs.content].includes(target) && // It isn't inside the dialog body
      !this.$refs.content.contains(target) && // We're the topmost dialog
      this.activeZIndex >= this.getMaxZIndex() && // It isn't inside a dependent element (like a menu)
      !this.getOpenDependentElements().some(el => el.contains(target)) // So we must have focused something outside the dialog and its children
      ) {
          // Find and focus the first available element inside the dialog
          const focusable = this.$refs.content.querySelectorAll('button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])');
          focusable.length && focusable[0].focus();
        }
    }

  },

  render(h) {
    const children = [];
    const data = {
      class: this.classes,
      ref: 'dialog',
      directives: [{
        name: 'click-outside',
        value: () => {
          this.isActive = false;
        },
        args: {
          closeConditional: this.closeConditional,
          include: this.getOpenDependentElements
        }
      }, {
        name: 'show',
        value: this.isActive
      }],
      on: {
        click: e => {
          e.stopPropagation();
        }
      },
      style: {}
    };

    if (!this.fullscreen) {
      data.style = {
        maxWidth: this.maxWidth === 'none' ? undefined : convertToUnit(this.maxWidth),
        width: this.width === 'auto' ? undefined : convertToUnit(this.width)
      };
    }

    children.push(this.genActivator());
    let dialog = h('div', data, this.showLazyContent(this.getContentSlot()));

    if (this.transition) {
      dialog = h('transition', {
        props: {
          name: this.transition,
          origin: this.origin
        }
      }, [dialog]);
    }

    children.push(h('div', {
      class: this.contentClasses,
      attrs: {
        role: 'document',
        tabindex: 0,
        ...this.getScopeIdAttrs()
      },
      on: {
        keydown: this.onKeydown
      },
      style: {
        zIndex: this.activeZIndex
      },
      ref: 'content'
    }, [this.$createElement(ThemeProvider, {
      props: {
        root: true,
        light: this.light,
        dark: this.dark
      }
    }, [dialog])]));
    return h('div', {
      staticClass: 'v-dialog__container',
      attrs: {
        role: 'dialog'
      },
      style: {
        display: !this.hasActivator || this.fullWidth ? 'block' : 'inline-block'
      }
    }, children);
  }

});
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