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Copyright (C) 2016 The Android Open Source Project

Licensed under the Apache License, Version 2.0 (the "License");
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<title>gr-diff-highlight</title>

<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
<script src="../../../bower_components/web-component-tester/browser.js"></script>
<link rel="import" href="../../../test/common-test-setup.html"/>
<link rel="import" href="gr-diff-highlight.html">

<script>void(0);</script>

<test-fixture id="basic">
  <template>
    <style>
      .tab-indicator:before {
        color: #C62828;
        /* >> character */
        content: '\00BB';
      }
    </style>
    <gr-diff-highlight>
      <table id="diffTable">

        <tbody class="section both">
           <tr class="diff-row side-by-side" left-type="both" right-type="both">
            <td class="left lineNum" data-value="1"></td>
            <td class="content both"><div class="contentText">[1] Nam cum ad me in Cumanum salutandi causa uterque venisset,</div></td>
            <td class="right lineNum" data-value="1"></td>
            <td class="content both"><div class="contentText">[1] Nam cum ad me in Cumanum salutandi causa uterque</div></td>
          </tr>
        </tbody>

        <tbody class="section delta">
          <tr class="diff-row side-by-side" left-type="remove" right-type="add">
            <td class="left lineNum" data-value="2"></td>
            <!-- Next tag is formatted to eliminate zero-length text nodes. -->
            <td class="content remove"><div class="contentText">na💢ti <hl class="foo">te, inquit</hl>, sumus <hl class="bar">aliquando</hl> otiosum, <hl>certe</hl> a <hl><span class="tab-indicator" style="tab-size:8;">	</span></hl>udiam, <hl>quid</hl> sit, <span class="tab-indicator" style="tab-size:8;">	</span>quod <hl>Epicurum</hl></div></td>
            <td class="right lineNum" data-value="2"></td>
            <!-- Next tag is formatted to eliminate zero-length text nodes. -->
            <td class="content add"><div class="contentText">nacti , <hl>,</hl> sumus <hl><span class="tab-indicator" style="tab-size:8;">	</span></hl> otiosum,  <span class="tab-indicator" style="tab-size:8;">	</span> audiam,  sit, quod</div></td>
          </tr>
        </tbody>


        <tbody class="section both">
          <tr class="diff-row side-by-side" left-type="both" right-type="both">
            <td class="left lineNum" data-value="138"></td>
            <td class="content both"><div class="contentText">[14] Nam cum ad me in Cumanum salutandi causa uterque venisset,</div></td>
            <td class="right lineNum" data-value="119"></td>
            <td class="content both"><div class="contentText">[14] Nam cum ad me in Cumanum salutandi causa uterque venisset,</div></td>
          </tr>
        </tbody>

        <tbody class="section delta">
          <tr class="diff-row side-by-side" left-type="remove" right-type="add">
            <td class="left lineNum" data-value="140"></td>
            <!-- Next tag is formatted to eliminate zero-length text nodes. -->
            <td class="content remove"><div class="contentText">na💢ti <hl class="foo">te, inquit</hl>, sumus <hl class="bar">aliquando</hl> otiosum, <hl>certe</hl> a <hl><span class="tab-indicator" style="tab-size:8;">	</span></hl>udiam, <hl>quid</hl> sit, <span class="tab-indicator" style="tab-size:8;">	</span>quod <hl>Epicurum</hl></div><div class="comment-thread">
                [Yet another random diff thread content here]
            </div></td>
            <td class="right lineNum" data-value="120"></td>
            <!-- Next tag is formatted to eliminate zero-length text nodes. -->
            <td class="content add"><div class="contentText">nacti , <hl>,</hl> sumus <hl><span class="tab-indicator" style="tab-size:8;">	</span></hl> otiosum,  <span class="tab-indicator" style="tab-size:8;">	</span> audiam,  sit, quod</div></td>
          </tr>
        </tbody>

        <tbody class="section both">
          <tr class="diff-row side-by-side" left-type="both" right-type="both">
            <td class="left lineNum" data-value="141"></td>
            <td class="content both"><div class="contentText">nam et<hl><span class="tab-indicator" style="tab-size:8;">	</span></hl>complectitur<span class="tab-indicator" style="tab-size:8;">	</span>verbis, quod vult, et dicit plane, quod intellegam;</div></td>
            <td class="right lineNum" data-value="130"></td>
            <td class="content both"><div class="contentText">nam et complectitur verbis, quod vult, et dicit plane, quod intellegam;</div></td>
          </tr>
        </tbody>

        <tbody class="section contextControl">
          <tr class="diff-row side-by-side" left-type="contextControl" right-type="contextControl">
            <td class="left contextLineNum" data-value="@@"></td>
            <td>
              <gr-button>+10↑</gr-button>
              -
              <gr-button>Show 21 common lines</gr-button>
              -
              <gr-button>+10↓</gr-button>
            </td>
            <td class="right contextLineNum" data-value="@@"></td>
            <td>
              <gr-button>+10↑</gr-button>
              -
              <gr-button>Show 21 common lines</gr-button>
              -
              <gr-button>+10↓</gr-button>
            </td>
          </tr>
        </tbody>

        <tbody class="section delta total">
          <tr class="diff-row side-by-side" left-type="blank" right-type="add">
            <td class="left"></td>
            <td class="blank"></td>
            <td class="right lineNum" data-value="146"></td>
            <td class="content add"><div class="contentText">[17] Quid igitur est? inquit; audire enim cupio, quid non probes. Principio, inquam,</div></td>
          </tr>
        </tbody>

        <tbody class="section both">
          <tr class="diff-row side-by-side" left-type="both" right-type="both">
            <td class="left lineNum" data-value="165"></td>
            <td class="content both"><div class="contentText"></div></td>
            <td class="right lineNum" data-value="147"></td>
            <td class="content both"><div class="contentText">in physicis, <hl><span class="tab-indicator" style="tab-size:8;">	</span></hl> quibus maxime gloriatur, primum totus est alienus. Democritea dicit</div></td>
          </tr>
        </tbody>

      </table>
    </gr-diff-highlight>
  </template>
</test-fixture>

<test-fixture id="highlighted">
  <template>
    <div>
      <hl class="rangeHighlight">foo</hl>
      bar
      <hl class="rangeHighlight">baz</hl>
    </div>
  </template>
</test-fixture>

<script>
  suite('gr-diff-highlight', () => {
    let element;
    let sandbox;

    setup(() => {
      sandbox = sinon.sandbox.create();
      element = fixture('basic')[1];
    });

    teardown(() => {
      sandbox.restore();
    });

    suite('selectionchange event handling', () => {
      const emulateSelection = function() {
        document.dispatchEvent(new CustomEvent('selectionchange'));
        element.flushDebouncer('selectionChange');
        element.flushDebouncer('removeActionBox');
      };

      setup(() => {
        sandbox.stub(element, '_handleSelection');
        sandbox.stub(element, '_removeActionBox');
      });

      test('enabled if logged in', () => {
        element.loggedIn = true;
        emulateSelection();
        assert.isTrue(element._handleSelection.called);
        assert.isTrue(element._removeActionBox.called);
      });

      test('ignored if logged out', () => {
        element.loggedIn = false;
        emulateSelection();
        assert.isFalse(element._handleSelection.called);
        assert.isFalse(element._removeActionBox.called);
      });
    });

    suite('comment events', () => {
      let builder;

      setup(() => {
        builder = {
          getContentsByLineRange: sandbox.stub().returns([]),
          getLineElByChild: sandbox.stub().returns({}),
          getSideByLineEl: sandbox.stub().returns('other-side'),
        };
        element._cachedDiffBuilder = builder;
      });

      test('comment-thread-mouseenter from line comments is ignored', () => {
        const threadEl = document.createElement('div');
        threadEl.className = 'comment-thread';
        threadEl.setAttribute('comment-side', 'right');
        threadEl.setAttribute('line-num', 3);
        element.appendChild(threadEl);
        element.commentRanges = [{side: 'right'}];

        sandbox.stub(element, 'set');
        threadEl.dispatchEvent(
            new CustomEvent('comment-thread-mouseenter', {bubbles: true}));
        assert.isFalse(element.set.called);
      });

      test('comment-thread-mouseenter from ranged comment causes set', () => {
        const threadEl = document.createElement('div');
        threadEl.className = 'comment-thread';
        threadEl.setAttribute('comment-side', 'right');
        threadEl.setAttribute('line-num', 3);
        threadEl.setAttribute('range', JSON.stringify({
          start_line: 3,
          start_character: 4,
          end_line: 5,
          end_character: 6,
        }));
        element.appendChild(threadEl);
        element.commentRanges = [{side: 'right', range: {
          start_line: 3,
          start_character: 4,
          end_line: 5,
          end_character: 6,
        }}];

        sandbox.stub(element, 'set');
        threadEl.dispatchEvent(
            new CustomEvent('comment-thread-mouseenter', {bubbles: true}));
        assert.isTrue(element.set.called);
        const args = element.set.lastCall.args;
        assert.deepEqual(args[0], ['commentRanges', 0, 'hovering']);
        assert.deepEqual(args[1], true);
      });

      test('comment-thread-mouseleave from line comments is ignored', () => {
        const threadEl = document.createElement('div');
        threadEl.className = 'comment-thread';
        threadEl.setAttribute('comment-side', 'right');
        threadEl.setAttribute('line-num', 3);
        element.appendChild(threadEl);
        element.commentRanges = [{side: 'right'}];

        sandbox.stub(element, 'set');
        threadEl.dispatchEvent(
            new CustomEvent('comment-thread-mouseleave', {bubbles: true}));
        assert.isFalse(element.set.called);
      });

      test('on create-range-comment action box is removed', () => {
        sandbox.stub(element, '_removeActionBox');
        element.fire('create-range-comment', {
          comment: {
            range: {},
          },
        });
        assert.isTrue(element._removeActionBox.called);
      });
    });

    suite('selection', () => {
      let diff;
      let builder;
      let contentStubs;

      const stubContent = (line, side, opt_child) => {
        const contentTd = diff.querySelector(
            `.${side}.lineNum[data-value="${line}"] ~ .content`);
        const contentText = contentTd.querySelector('.contentText');
        const lineEl = diff.querySelector(
            `.${side}.lineNum[data-value="${line}"]`);
        contentStubs.push({
          lineEl,
          contentTd,
          contentText,
        });
        builder.getContentByLineEl.withArgs(lineEl).returns(contentText);
        builder.getLineNumberByChild.withArgs(lineEl).returns(line);
        builder.getContentByLine.withArgs(line, side).returns(contentText);
        builder.getSideByLineEl.withArgs(lineEl).returns(side);
        return contentText;
      };

      const emulateSelection = (startNode, startOffset, endNode, endOffset) => {
        const selection = window.getSelection();
        const range = document.createRange();
        range.setStart(startNode, startOffset);
        range.setEnd(endNode, endOffset);
        selection.addRange(range);
        element._handleSelection();
      };

      const getActionRange = () =>
          Polymer.dom(element.root).querySelector(
              'gr-selection-action-box').range;

      const getActionSide = () =>
          Polymer.dom(element.root).querySelector(
              'gr-selection-action-box').side;

      const getLineElByChild = node => {
        const stubs = contentStubs.find(stub => stub.contentTd.contains(node));
        return stubs && stubs.lineEl;
      };

      setup(() => {
        contentStubs = [];
        stub('gr-selection-action-box', {
          placeAbove: sandbox.stub(),
          placeBelow: sandbox.stub(),
        });
        diff = element.querySelector('#diffTable');
        builder = {
          getContentByLine: sandbox.stub(),
          getContentByLineEl: sandbox.stub(),
          getLineElByChild,
          getLineNumberByChild: sandbox.stub(),
          getSideByLineEl: sandbox.stub(),
        };
        element._cachedDiffBuilder = builder;
      });

      teardown(() => {
        contentStubs = null;
        window.getSelection().removeAllRanges();
      });

      test('single first line', () => {
        const content = stubContent(1, 'right');
        sandbox.spy(element, '_positionActionBox');
        emulateSelection(content.firstChild, 5, content.firstChild, 12);
        const actionBox = element.$$('gr-selection-action-box');
        assert.isTrue(actionBox.positionBelow);
      });

      test('multiline starting on first line', () => {
        const startContent = stubContent(1, 'right');
        const endContent = stubContent(2, 'right');
        sandbox.spy(element, '_positionActionBox');
        emulateSelection(
            startContent.firstChild, 10, endContent.lastChild, 7);
        const actionBox = element.$$('gr-selection-action-box');
        assert.isTrue(actionBox.positionBelow);
      });

      test('single line', () => {
        const content = stubContent(138, 'left');
        sandbox.spy(element, '_positionActionBox');
        emulateSelection(content.firstChild, 5, content.firstChild, 12);
        const actionBox = element.$$('gr-selection-action-box');
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 138,
          start_character: 5,
          end_line: 138,
          end_character: 12,
        });
        assert.equal(getActionSide(), 'left');
        assert.notOk(actionBox.positionBelow);
      });

      test('multiline', () => {
        const startContent = stubContent(119, 'right');
        const endContent = stubContent(120, 'right');
        sandbox.spy(element, '_positionActionBox');
        emulateSelection(
            startContent.firstChild, 10, endContent.lastChild, 7);
        assert.isTrue(element.isRangeSelected());
        const actionBox = element.$$('gr-selection-action-box');

        assert.deepEqual(getActionRange(), {
          start_line: 119,
          start_character: 10,
          end_line: 120,
          end_character: 36,
        });
        assert.equal(getActionSide(), 'right');
        assert.notOk(actionBox.positionBelow);
      });

      test('multiple ranges aka firefox implementation', () => {
        const startContent = stubContent(119, 'right');
        const endContent = stubContent(120, 'right');

        const startRange = document.createRange();
        startRange.setStart(startContent.firstChild, 10);
        startRange.setEnd(startContent.firstChild, 11);

        const endRange = document.createRange();
        endRange.setStart(endContent.lastChild, 6);
        endRange.setEnd(endContent.lastChild, 7);

        const getRangeAtStub = sandbox.stub();
        getRangeAtStub
            .onFirstCall().returns(startRange)
            .onSecondCall().returns(endRange);
        sandbox.stub(window, 'getSelection').returns({
          rangeCount: 2,
          getRangeAt: getRangeAtStub,
          removeAllRanges: sandbox.stub(),
        });
        element._handleSelection();
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 119,
          start_character: 10,
          end_line: 120,
          end_character: 36,
        });
      });

      test('multiline grow end highlight over tabs', () => {
        const startContent = stubContent(119, 'right');
        const endContent = stubContent(120, 'right');
        emulateSelection(startContent.firstChild, 10, endContent.firstChild, 2);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 119,
          start_character: 10,
          end_line: 120,
          end_character: 2,
        });
        assert.equal(getActionSide(), 'right');
      });

      test('collapsed', () => {
        const content = stubContent(138, 'left');
        emulateSelection(content.firstChild, 5, content.firstChild, 5);
        assert.isOk(window.getSelection().getRangeAt(0).startContainer);
        assert.isFalse(element.isRangeSelected());
      });

      test('starts inside hl', () => {
        const content = stubContent(140, 'left');
        const hl = content.querySelector('.foo');
        emulateSelection(hl.firstChild, 2, hl.nextSibling, 7);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 8,
          end_line: 140,
          end_character: 23,
        });
        assert.equal(getActionSide(), 'left');
      });

      test('ends inside hl', () => {
        const content = stubContent(140, 'left');
        const hl = content.querySelector('.bar');
        emulateSelection(hl.previousSibling, 2, hl.firstChild, 3);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 18,
          end_line: 140,
          end_character: 27,
        });
      });

      test('multiple hl', () => {
        const content = stubContent(140, 'left');
        const hl = content.querySelectorAll('hl')[4];
        emulateSelection(content.firstChild, 2, hl.firstChild, 2);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 2,
          end_line: 140,
          end_character: 61,
        });
        assert.equal(getActionSide(), 'left');
      });

      test('starts outside of diff', () => {
        const contentText = stubContent(140, 'left');
        const contentTd = contentText.parentElement;

        emulateSelection(contentTd.previousElementSibling, 0,
            contentText.firstChild, 2);
        assert.isFalse(element.isRangeSelected());
      });

      test('ends outside of diff', () => {
        const content = stubContent(140, 'left');
        emulateSelection(content.nextElementSibling.firstChild, 2,
            content.firstChild, 2);
        assert.isFalse(element.isRangeSelected());
      });

      test('starts and ends on different sides', () => {
        const startContent = stubContent(140, 'left');
        const endContent = stubContent(130, 'right');
        emulateSelection(startContent.firstChild, 2, endContent.firstChild, 2);
        assert.isFalse(element.isRangeSelected());
      });

      test('starts in comment thread element', () => {
        const startContent = stubContent(140, 'left');
        const comment = startContent.parentElement.querySelector(
            '.comment-thread');
        const endContent = stubContent(141, 'left');
        emulateSelection(comment.firstChild, 2, endContent.firstChild, 4);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 83,
          end_line: 141,
          end_character: 4,
        });
        assert.equal(getActionSide(), 'left');
      });

      test('ends in comment thread element', () => {
        const content = stubContent(140, 'left');
        const comment = content.parentElement.querySelector(
            '.comment-thread');
        emulateSelection(content.firstChild, 4, comment.firstChild, 1);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 4,
          end_line: 140,
          end_character: 83,
        });
        assert.equal(getActionSide(), 'left');
      });

      test('starts in context element', () => {
        const contextControl =
            diff.querySelector('.contextControl').querySelector('gr-button');
        const content = stubContent(146, 'right');
        emulateSelection(contextControl, 0, content.firstChild, 7);
        // TODO (viktard): Select nearest line.
        assert.isFalse(element.isRangeSelected());
      });

      test('ends in context element', () => {
        const contextControl =
            diff.querySelector('.contextControl').querySelector('gr-button');
        const content = stubContent(141, 'left');
        emulateSelection(content.firstChild, 2, contextControl, 1);
        // TODO (viktard): Select nearest line.
        assert.isFalse(element.isRangeSelected());
      });

      test('selection containing context element', () => {
        const startContent = stubContent(130, 'right');
        const endContent = stubContent(146, 'right');
        emulateSelection(startContent.firstChild, 3, endContent.firstChild, 14);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 130,
          start_character: 3,
          end_line: 146,
          end_character: 14,
        });
        assert.equal(getActionSide(), 'right');
      });

      test('ends at a tab', () => {
        const content = stubContent(140, 'left');
        emulateSelection(
            content.firstChild, 1, content.querySelector('span'), 0);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 1,
          end_line: 140,
          end_character: 51,
        });
        assert.equal(getActionSide(), 'left');
      });

      test('starts at a tab', () => {
        const content = stubContent(140, 'left');
        emulateSelection(
            content.querySelectorAll('hl')[3], 0,
            content.querySelectorAll('span')[1].nextSibling, 1);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 140,
          start_character: 51,
          end_line: 140,
          end_character: 71,
        });
        assert.equal(getActionSide(), 'left');
      });

      test('properly accounts for syntax highlighting', () => {
        const content = stubContent(140, 'left');
        const spy = sinon.spy(element, '_normalizeRange');
        emulateSelection(
            content.querySelectorAll('hl')[3], 0,
            content.querySelectorAll('span')[1], 0);
        const spyCall = spy.getCall(0);
        const range = window.getSelection().getRangeAt(0);
        assert.notDeepEqual(spyCall.returnValue, range);
      });

      test('GrRangeNormalizer._getTextOffset computes text offset', () => {
        let content = stubContent(140, 'left');
        let child = content.lastChild.lastChild;
        let result = GrRangeNormalizer._getTextOffset(content, child);
        assert.equal(result, 75);
        content = stubContent(146, 'right');
        child = content.lastChild;
        result = GrRangeNormalizer._getTextOffset(content, child);
        assert.equal(result, 0);
      });

      test('_fixTripleClickSelection', () => {
        const startContent = stubContent(119, 'right');
        const endContent = stubContent(120, 'right');
        emulateSelection(startContent.firstChild, 0, endContent.firstChild, 0);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 119,
          start_character: 0,
          end_line: 119,
          end_character: element._getLength(startContent),
        });
        assert.equal(getActionSide(), 'right');
      });

      test('_fixTripleClickSelection empty line', () => {
        const startContent = stubContent(146, 'right');
        const endContent = stubContent(165, 'left');
        emulateSelection(startContent.firstChild, 0,
            endContent.parentElement.previousElementSibling, 0);
        assert.isTrue(element.isRangeSelected());
        assert.deepEqual(getActionRange(), {
          start_line: 146,
          start_character: 0,
          end_line: 146,
          end_character: 84,
        });
        assert.equal(getActionSide(), 'right');
      });
    });
  });
</script>