<!--
@license
Copyright (C) 2015 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
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<link rel="import" href="/bower_components/polymer/polymer.html">
<link rel="import" href="../../../behaviors/fire-behavior/fire-behavior.html">
<link rel="import" href="../../../behaviors/gr-patch-set-behavior/gr-patch-set-behavior.html">
<link rel="import" href="../../../styles/shared-styles.html">
<link rel="import" href="../../shared/gr-button/gr-button.html">
<link rel="import" href="../gr-diff-builder/gr-diff-builder.html">
<link rel="import" href="../gr-diff-highlight/gr-diff-highlight.html">
<link rel="import" href="../gr-diff-selection/gr-diff-selection.html">
<link rel="import" href="../gr-syntax-themes/gr-syntax-theme.html">
<link rel="import" href="../gr-ranged-comment-themes/gr-ranged-comment-theme.html">

<script src="../../../scripts/hiddenscroll.js"></script>

<dom-module id="gr-diff">
  <template>
    <style include="shared-styles">
      :host(.no-left) .sideBySide ::content .left,
      :host(.no-left) .sideBySide ::content .left + td,
      :host(.no-left) .sideBySide ::content .right:not([data-value]),
      :host(.no-left) .sideBySide ::content .right:not([data-value]) + td {
        display: none;
      }
      ::slotted(*) .thread-group {
        display: block;
        max-width: var(--content-width, 80ch);
        white-space: normal;
      }

      .thread-group {
        display: block;
        max-width: var(--content-width, 80ch);
        white-space: normal;
      }
      .diffContainer {
        display: flex;
        font-family: var(--monospace-font-family);
        @apply --diff-container-styles;
      }
      .diffContainer.hiddenscroll {
        margin-bottom: .8em;
      }
      table {
        border-collapse: collapse;
        border-right: 1px solid var(--border-color);
        table-layout: fixed;
      }
      .lineNum {
        background-color: var(--table-header-background-color);
      }
      .image-diff .gr-diff {
        text-align: center;
      }
      .image-diff img {
        box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
        max-width: 50em;
      }
      .image-diff .right.lineNum {
        border-left: 1px solid var(--border-color);
      }
      .image-diff label,
      .binary-diff label {
        font-family: var(--font-family);
        font-style: italic;
      }
      .diff-row {
        outline: none;
      }
      .diff-row.target-row.target-side-left .lineNum.left,
      .diff-row.target-row.target-side-right .lineNum.right,
      .diff-row.target-row.unified .lineNum {
        background-color: var(--diff-selection-background-color);
        color: var(--primary-text-color);
      }
      .content {
        background-color: var(--view-background-color);
      }
      .blank {
        background-color: var(--diff-blank-background-color);
      }
      .image-diff .content {
        background-color: var(--table-header-background-color);
      }
      .full-width {
        width: 100%;
      }
      .full-width .contentText {
        white-space: pre-wrap;
        word-wrap: break-word;
      }
      .lineNum,
      .content {
        /* Set font size based the user's diff preference. */
        font-size: var(--font-size, var(--font-size-normal));
        vertical-align: top;
        white-space: pre;
      }
      .contextLineNum,
      .lineNum {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;

        color: var(--deemphasized-text-color);
        padding: 0 .5em;
        text-align: right;
      }
      .canComment .lineNum {
        cursor: pointer;
      }
      .content {
        /* Set min width since setting width on table cells still
           allows them to shrink. Do not set max width because
           CJK (Chinese-Japanese-Korean) glyphs have variable width */
        min-width: var(--content-width, 80ch);
        width: var(--content-width, 80ch);
      }
      .content.add .intraline,
      /* If there are no intraline info, consider everything changed */
      .content.add.no-intraline-info,
      .delta.total .content.add {
        background-color: var(--dark-add-highlight-color);
      }
      .content.add {
        background-color: var(--light-add-highlight-color);
      }
      .content.remove .intraline,
      /* If there are no intraline info, consider everything changed */
      .content.remove.no-intraline-info,
      .delta.total .content.remove {
        background-color: var(--dark-remove-highlight-color);
      }
      .content.remove {
        background-color: var(--light-remove-highlight-color);
      }

      /* dueToRebase */
      .dueToRebase .content.add .intraline,
      .delta.total.dueToRebase .content.add {
        background-color: var(--dark-rebased-add-highlight-color);
      }
      .dueToRebase .content.add {
        background-color: var(--light-rebased-add-highlight-color);
      }
      .dueToRebase .content.remove .intraline,
      .delta.total.dueToRebase .content.remove {
        background-color: var(--dark-rebased-remove-highlight-color);
      }
      .dueToRebase .content.remove {
        background-color: var(--light-remove-add-highlight-color);
      }

      /* ignoredWhitespaceOnly */
      .ignoredWhitespaceOnly .content.add .intraline,
      .delta.total.ignoredWhitespaceOnly .content.add,
      .ignoredWhitespaceOnly .content.add,
      .ignoredWhitespaceOnly .content.remove .intraline,
      .delta.total.ignoredWhitespaceOnly .content.remove,
      .ignoredWhitespaceOnly .content.remove {
        background: none;
      }

      .content .contentText:empty:after {
        /* Newline, to ensure empty lines are one line-height tall. */
        content: '\A';
      }
      .contextControl {
        background-color: var(--diff-context-control-background-color);
        border: 1px solid var(--diff-context-control-border-color);
      }
      .contextControl gr-button {
        display: inline-block;
        text-decoration: none;
        --gr-button: {
          color: var(--diff-context-control-color);
          padding: .2em;
        }
      }
      .contextControl td:not(.lineNum) {
        text-align: center;
      }
      .displayLine .diff-row.target-row td {
        box-shadow: inset 0 -1px var(--border-color);
      }
      .br:after {
        /* Line feed */
        content: '\A';
      }
      .tab {
        display: inline-block;
      }
      .tab-indicator:before {
        color: var(--diff-tab-indicator-color);
        /* >> character */
        content: '\00BB';
        position: absolute;
      }
      /* Is defined after other background-colors, such that this
         rule wins in case of same specificity. */
      .trailing-whitespace,
      .content .trailing-whitespace,
      .trailing-whitespace .intraline,
      .content .trailing-whitespace .intraline {
        border-radius: .4em;
        background-color: var(--diff-trailing-whitespace-indicator);
      }
      #diffHeader {
        background-color: var(--table-header-background-color);
        border-bottom: 1px solid var(--border-color);
        color: var(--link-color);
        font-family: var(--monospace-font-family);
        font-size: var(--font-size, var(--font-size-normal));
        padding: 0.5em 0 0.5em 4em;
      }
      #loadingError,
      #sizeWarning {
        display: none;
        margin: 1em auto;
        max-width: 60em;
        text-align: center;
      }
      #loadingError {
        color: var(--error-text-color);
      }
      #sizeWarning gr-button {
        margin: 1em;
      }
      #loadingError.showError,
      #sizeWarning.warn {
        display: block;
      }
      .target-row td.blame {
        background: var(--diff-selection-background-color);
      }
      col.blame {
        display: none;
      }
      td.blame {
        display: none;
        font-family: var(--font-family);
        font-size: var(--font-size, var(--font-size-normal));
        padding: 0 .5em;
        white-space: pre;
      }
      :host(.showBlame) col.blame {
        display: table-column;
      }
      :host(.showBlame) td.blame {
        display: table-cell;
      }
      td.blame > span {
        opacity: 0.6;
      }
      td.blame > span.startOfRange {
        opacity: 1;
      }
      td.blame .sha {
        font-family: var(--monospace-font-family);
      }
      .full-width td.blame {
        overflow: hidden;
        width: 200px;
      }
      /** Since the line limit position is determined by charachter size, blank
       lines also need to have the same font size as everything else */
      .full-width .blank {
        font-size: var(--font-size, var(--font-size-normal));
      }
      /** Support the line length indicator **/
      .full-width td.content,
      .full-width td.blank {
        /* Base 64 encoded 1x1px of #ddd */
        background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mO8+x8AAr8B3gzOjaQAAAAASUVORK5CYII=');
        background-position: var(--line-limit) 0;
        background-repeat: repeat-y;
      }
      .newlineWarning {
        color: var(--deemphasized-text-color);
        text-align: center;
      }
      .newlineWarning.hidden {
        display: none;
      }
      .lineNum.COVERED {
         background-color: #E0F2F1;
      }
      .lineNum.NOT_COVERED {
        background-color: #FFD1A4;
      }
      .lineNum.PARTIALLY_COVERED {
        background: linear-gradient(to right bottom, #FFD1A4 0%, #FFD1A4 50%, #E0F2F1 50%, #E0F2F1 100%);
      }

      /** BEGIN: Select and copy for Polymer 2 */
      /** Below was copied and modified from the original css in gr-diff-selection.html */
      .content,
      .contextControl,
      .blame {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
      }

      .selected-left:not(.selected-comment) .side-by-side .left + .content .contentText,
      .selected-right:not(.selected-comment) .side-by-side .right + .content .contentText,
      .selected-left:not(.selected-comment) .unified .left.lineNum ~ .content:not(.both) .contentText,
      .selected-right:not(.selected-comment) .unified .right.lineNum ~ .content .contentText,
      .selected-left.selected-comment .side-by-side .left + .content .message,
      .selected-right.selected-comment .side-by-side .right + .content .message :not(.collapsedContent),
      .selected-comment .unified .message :not(.collapsedContent),
      .selected-blame .blame {
        -webkit-user-select: text;
        -moz-user-select: text;
        -ms-user-select: text;
        user-select: text;
      }

      /** Make comments selectable when selected */
      .selected-left.selected-comment ::slotted(gr-comment-thread[comment-side=left]),
      .selected-right.selected-comment ::slotted(gr-comment-thread[comment-side=right]) {
        -webkit-user-select: text;
        -moz-user-select: text;
        -ms-user-select: text;
        user-select: text;
      }
      /** END: Select and copy for Polymer 2 */

      .whitespace-change-only-message {
        background-color: var(--diff-context-control-background-color);
        border: 1px solid var(--diff-context-control-border-color);
        text-align: center;
      }
    </style>
    <style include="gr-syntax-theme"></style>
    <style include="gr-ranged-comment-theme"></style>
    <div id="diffHeader" hidden$="[[_computeDiffHeaderHidden(_diffHeaderItems)]]">
      <template
          is="dom-repeat"
          items="[[_diffHeaderItems]]">
        <div>[[item]]</div>
      </template>
    </div>
    <div class$="[[_computeContainerClass(loggedIn, viewMode, displayLine)]]"
        on-tap="_handleTap">
      <gr-diff-selection diff="[[diff]]">
        <gr-diff-highlight
            id="highlights"
            logged-in="[[loggedIn]]"
            comment-ranges="{{_commentRanges}}">
          <gr-diff-builder
              id="diffBuilder"
              comment-ranges="[[_commentRanges]]"
              coverage-ranges="[[coverageRanges]]"
              project-name="[[projectName]]"
              diff="[[diff]]"
              diff-path="[[path]]"
              change-num="[[changeNum]]"
              patch-num="[[patchRange.patchNum]]"
              view-mode="[[viewMode]]"
              line-wrapping="[[lineWrapping]]"
              is-image-diff="[[isImageDiff]]"
              base-image="[[baseImage]]"
              layers="[[layers]]"
              revision-image="[[revisionImage]]">
            <table
                id="diffTable"
                class$="[[_diffTableClass]]"
                role="presentation"></table>

            <template is="dom-if" if="[[showNoChangeMessage(loading, prefs, _diffLength)]]">
              <div class="whitespace-change-only-message">
                This file only contains whitespace changes.
                Modify the whitespace setting to see the changes.
              </div>
            </template>
          </gr-diff-builder>
        </gr-diff-highlight>
      </gr-diff-selection>
    </div>
    <div class$="[[_computeNewlineWarningClass(_newlineWarning, loading)]]">
      [[_newlineWarning]]
    </div>
    <div id="loadingError" class$="[[_computeErrorClass(errorMessage)]]">
      [[errorMessage]]
    </div>
    <div id="sizeWarning" class$="[[_computeWarningClass(_showWarning)]]">
      <p>
        Prevented render because "Whole file" is enabled and this diff is very
        large (about [[_diffLength]] lines).
      </p>
      <gr-button on-click="_handleLimitedBypass">
        Render with limited context
      </gr-button>
      <gr-button on-click="_handleFullBypass">
        Render anyway (may be slow)
      </gr-button>
    </div>
  </template>
  <script src="gr-diff-line.js"></script>
  <script src="gr-diff-group.js"></script>
  <script src="gr-diff.js"></script>
</dom-module>