<!--
@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,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->

<link rel="import" href="../../../bower_components/polymer/polymer.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">

<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;
      }
      .thread-group, ::slotted(*) .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);
      }
      .blank,
      .content {
        background-color: var(--view-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,
      .delta.total .content.add {
        background-color: var(--dark-add-highlight-color);
      }
      .content.add {
        background-color: var(--light-add-highlight-color);
      }
      .content.remove .intraline,
      .delta.total .content.remove {
        background-color: var(--dark-remove-highlight-color);
      }
      .content.remove {
        background-color: var(--light-remove-highlight-color);
      }
      .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);
      }
      .content .contentText:empty:after {
        /* Newline, to ensure empty lines are one line-height tall. */
        content: '\A';
      }
      .contextControl {
        background-color: var(--diff-context-control-color);
        border: 1px solid var(--diff-context-control-border-color);
      }
      .contextControl gr-button {
        display: inline-block;
        text-decoration: none;
        --gr-button: {
          color: var(--deemphasized-text-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%);
      }
    </style>
    <style include="gr-syntax-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]]"
              revision-image="[[revisionImage]]">
            <table
                id="diffTable"
                class$="[[_diffTableClass]]"
                role="presentation"></table>
          </gr-diff-builder>
        </gr-diff-highlight>
      </gr-diff-selection>
    </div>
    <div class$="[[_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-tap="_handleLimitedBypass">
        Render with limited context
      </gr-button>
      <gr-button on-tap="_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>