src/main/java/com/google/gerrit/client/patches/SideBySideTable.java - gerrit - Git at Google

 // Copyright (C) 2008 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.

 package com.google.gerrit.client.patches;

 import com.google.gerrit.client.data.SideBySideLine;
 import com.google.gerrit.client.data.SideBySidePatchDetail;
 import com.google.gerrit.client.reviewdb.PatchLineComment;
 import com.google.gerrit.client.ui.ComplexDisclosurePanel;
 import com.google.gwt.user.client.ui.FlowPanel;
 import com.google.gwt.user.client.ui.InlineLabel;
 import com.google.gwt.user.client.ui.Widget;
 import com.google.gwtexpui.safehtml.client.SafeHtmlBuilder;

 import java.util.Iterator;
 import java.util.List;

 public class SideBySideTable extends AbstractPatchContentTable {
   private int fileCnt;
   private int maxLineNumber;

   protected int getFileCount() {
     return fileCnt;
   }

   protected String getFileTitle(int file) {
     return table.getText(0, 1 + file * 2 + 1);
   }

   @Override
   protected void onCellDoubleClick(final int row, int column) {
     if (column > 0 && getRowItem(row) instanceof SideBySideLineList) {
       final SideBySideLineList pl = (SideBySideLineList) getRowItem(row);
       final short file = (short) ((column - 1) / 2);
       if (column < (1 + file * 2 + 1)) {
         column++;
       }

       final SideBySideLine line = pl.lines.get(file);
       switch (line.getType()) {
         case DELETE:
         case EQUAL:
         case INSERT: {
           createCommentEditor(row + 1, column, line.getLineNumber(), file);
           break;
         }
       }
     }
   }

   @Override
   protected void onOpenItem(final Object item) {
     if (item instanceof SideBySideLineList) {
       final SideBySideLineList pl = (SideBySideLineList) item;
       final short file = (short) (pl.lines.size() - 1);
       final int row = getCurrentRow();
       final int column = 1 + file * 2 + 1;
       final SideBySideLine line = pl.lines.get(file);
       createCommentEditor(row + 1, column, line.getLineNumber(), file);
       return;
     }

     super.onOpenItem(item);
   }

   @Override
   protected void bindDrafts(final List<PatchLineComment> drafts) {
     int[] rows = new int[fileCnt];
     for (final PatchLineComment c : drafts) {
       final int side = fileFor(c);
       if (side < 0 || fileCnt <= side) {
         // We shouldn't have been given this draft; it doesn't display
         // in our current UI layout.
         //
         continue;
       }
       int row = rows[side];
       while (row < table.getRowCount()) {
         if (getRowItem(row) instanceof SideBySideLineList) {
           final SideBySideLineList pl = (SideBySideLineList) getRowItem(row);
           final SideBySideLine line = pl.lines.get(side);
           if (line != null && line.getLineNumber() >= c.getLine()) {
             break;
           }
         }
         row++;
       }
       row++;
       boolean needInsert = true;
       for (int cell = 0; cell < table.getCellCount(row); cell++) {
         final Widget w = table.getWidget(row, cell);
         if (w instanceof CommentEditorPanel
             || w instanceof ComplexDisclosurePanel) {
           needInsert = false;
           break;
         }
       }
       if (needInsert) {
         table.insertRow(row);
         table.getCellFormatter().setStyleName(row, 0, S_ICON_CELL);
       }
       bindComment(row, 1 + side * 2 + 1, c, true);
       rows[side] = row + 1;
     }
   }

   public void display(final SideBySidePatchDetail detail) {
     setPatchKey(detail.getPatch().getKey());
     initVersions(detail.getFileCount());
     setAccountInfoCache(detail.getAccounts());
     fileCnt = detail.getFileCount();
     maxLineNumber = detail.getLineCount();

     List<SideBySideLine> prior = null;

     // Generate the table in HTML, because its quicker than by DOM.
     // This pass does not include the line comments; they need full
     // GWT widgets and are relatively infrequent. We do them later.
     //
     final SafeHtmlBuilder nc = new SafeHtmlBuilder();
     appendHeader(nc);
     for (final List<SideBySideLine> pLine : detail.getLines()) {
       if (skipped(prior, pLine) > 0) {
         appendSkipLine(nc);
       }
       prior = pLine;
       appendFileLine(nc, pLine);
     }
     if (skipped(prior, null) > 0) {
       appendSkipLine(nc);
     }
     resetHtml(nc);

     // Insert the comment widgets now that the table DOM has been
     // parsed out of the HTML by the browser. We also bind each
     // of the row item objects.
     //
     int row = 1;
     prior = null;
     for (final List<SideBySideLine> pLine : detail.getLines()) {
       final int skipCnt = skipped(prior, pLine);
       if (skipCnt > 0) {
         bindSkipLine(row, skipCnt);
         row++;
       }
       prior = pLine;

       setRowItem(row, new SideBySideLineList(pLine));

       final int lineRow = row;
       for (int fileId = 0; fileId < fileCnt; fileId++) {
         final SideBySideLine s = pLine.get(fileId);
         if (s == null) {
           continue;
         }

         final List<PatchLineComment> comments = s.getComments();
         if (comments == null) {
           continue;
         }

         int commentRow = lineRow + 1;
         for (Iterator<PatchLineComment> ci = comments.iterator(); ci.hasNext();) {
           final PatchLineComment c = ci.next();
           boolean needInsert = true;
           for (int cell = 0; cell < table.getCellCount(commentRow); cell++) {
             final Widget w = table.getWidget(commentRow, cell);
             if (w instanceof CommentEditorPanel
                 || w instanceof ComplexDisclosurePanel) {
               needInsert = false;
               break;
             }
           }
           if (needInsert) {
             table.insertRow(commentRow);
             table.getCellFormatter().setStyleName(commentRow, 0, S_ICON_CELL);
           }
           table.setWidget(commentRow, 1 + 2 * fileId, null);
           bindComment(commentRow, 1 + 2 * fileId + 1, c, !ci.hasNext());
           commentRow++;
         }
         row = Math.max(row, commentRow - 1);
       }
       row++;
     }
     final int skipCnt = skipped(prior, null);
     if (skipCnt > 0) {
       bindSkipLine(row, skipCnt);
       row++;
     }
   }

   private void appendHeader(final SafeHtmlBuilder m) {
     final String width = (100 / fileCnt) + "%";
     m.openTr();

     m.openTd();
     m.addStyleName(S_ICON_CELL);
     m.addStyleName("FileColumnHeader");
     m.nbsp();
     m.closeTd();

     if (fileCnt == 2) {
       m.openTd();
       m.addStyleName("FileColumnHeader");
       m.addStyleName("LineNumber");
       m.nbsp();
       m.closeTd();

       m.openTd();
       m.setStyleName("FileColumnHeader");
       m.setAttribute("width", width);
       m.append(PatchUtil.C.patchHeaderOld());
       m.closeTd();
     } else {
       for (int fileId = 0; fileId < fileCnt - 1; fileId++) {
         m.openTd();
         m.addStyleName("FileColumnHeader");
         m.addStyleName("LineNumber");
         m.nbsp();
         m.closeTd();

         m.openTd();
         m.setStyleName("FileColumnHeader");
         m.setAttribute("width", width);
         m.append(PatchUtil.M.patchHeaderAncestor(fileId + 1));
         m.closeTd();
       }
     }

     m.openTd();
     m.addStyleName("FileColumnHeader");
     m.addStyleName("LineNumber");
     m.nbsp();
     m.closeTd();

     m.openTd();
     m.setStyleName("FileColumnHeader");
     m.setAttribute("width", width);
     m.append(PatchUtil.C.patchHeaderNew());
     m.closeTd();

     m.closeTr();
   }

   private int skipped(List<SideBySideLine> prior,
       final List<SideBySideLine> pLine) {
     int existCnt = 0;
     int gapCnt = 0;
     int lines = 0;

     if (prior != null && pLine != null) {
       for (int i = 0; i < fileCnt; i++) {
         final SideBySideLine ps = prior.get(i);
         final SideBySideLine cs = pLine.get(i);
         if (ps != null && cs != null) {
           existCnt++;
           if (ps.getLineNumber() + 1 != cs.getLineNumber()) {
             lines =
                 Math.max(lines, cs.getLineNumber() - ps.getLineNumber() - 1);
             gapCnt++;
           }
         }
       }
     } else if (prior != null) {
       for (int i = 0; i < fileCnt; i++) {
         final SideBySideLine ps = prior.get(i);
         if (ps != null) {
           existCnt++;
           if (ps.getLineNumber() < maxLineNumber) {
             lines = Math.max(lines, maxLineNumber - ps.getLineNumber() - 1);
             gapCnt++;
           }
         }
       }
     } else {
       for (int i = 0; i < fileCnt; i++) {
         final SideBySideLine cs = pLine.get(i);
         if (cs != null) {
           existCnt++;
           if (1 != cs.getLineNumber()) {
             lines = Math.max(lines, cs.getLineNumber() - 1);
             gapCnt++;
           }
         }
       }
     }
     return existCnt == gapCnt ? lines : 0;
   }

   private void appendSkipLine(final SafeHtmlBuilder m) {
     m.openTr();

     m.openTd();
     m.setStyleName(S_ICON_CELL);
     m.nbsp();
     m.closeTd();

     m.openTd();
     m.setStyleName("SkipLine");
     m.setAttribute("colspan", fileCnt * 2);
     m.closeTd();
     m.closeTr();
   }

   private void bindSkipLine(int row, final int skipCnt) {
     final FlowPanel skipPanel = new FlowPanel();
     skipPanel.add(new InlineLabel(PatchUtil.M.patchSkipRegion(skipCnt)));
     table.setWidget(row, 1, skipPanel);
   }

   private void appendFileLine(final SafeHtmlBuilder m,
       final List<SideBySideLine> line) {
     m.openTr();
     m.setAttribute("valign", "top");

     m.openTd();
     m.setStyleName(S_ICON_CELL);
     m.nbsp();
     m.closeTd();

     for (int fileId = 0; fileId < fileCnt; fileId++) {
       final SideBySideLine s = line.get(fileId);
       if (s != null) {
         m.openTd();
         m.setStyleName("LineNumber");
         m.append(s.getLineNumber());
         m.closeTd();

         m.openTd();
         m.addStyleName("FileLine");
         m.addStyleName("FileLine-" + s.getType().name());
         if (!"".equals(s.getText())) {
           boolean showWhitespaceErrors = false;
           if (fileId == fileCnt - 1
               && s.getType() == SideBySideLine.Type.INSERT) {
             // Only show whitespace errors in the last column, and
             // only if the line is introduced here.
             //
             showWhitespaceErrors = true;
           }
           m.append(PatchUtil.lineToSafeHtml(s.getText(),
               PatchUtil.DEFAULT_LINE_LENGTH, showWhitespaceErrors));
         } else {
           m.nbsp();
         }
         m.closeTd();
       } else {
         m.openTd();
         m.setStyleName("LineNumber");
         m.nbsp();
         m.closeTd();

         m.openTd();
         m.addStyleName("FileLine");
         m.addStyleName("FileLineNone");
         m.nbsp();
         m.closeTd();
       }
     }

     m.closeTr();
   }

   private static class SideBySideLineList {
     final List<SideBySideLine> lines;

     SideBySideLineList(final List<SideBySideLine> a) {
       lines = a;
     }
   }
 }
	// Copyright (C) 2008 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.

	package com.google.gerrit.client.patches;

	import com.google.gerrit.client.data.SideBySideLine;
	import com.google.gerrit.client.data.SideBySidePatchDetail;
	import com.google.gerrit.client.reviewdb.PatchLineComment;
	import com.google.gerrit.client.ui.ComplexDisclosurePanel;
	import com.google.gwt.user.client.ui.FlowPanel;
	import com.google.gwt.user.client.ui.InlineLabel;
	import com.google.gwt.user.client.ui.Widget;
	import com.google.gwtexpui.safehtml.client.SafeHtmlBuilder;

	import java.util.Iterator;
	import java.util.List;

	public class SideBySideTable extends AbstractPatchContentTable {
	private int fileCnt;
	private int maxLineNumber;

	protected int getFileCount() {
	return fileCnt;
	}

	protected String getFileTitle(int file) {
	return table.getText(0, 1 + file * 2 + 1);
	}

	@Override
	protected void onCellDoubleClick(final int row, int column) {
	if (column > 0 && getRowItem(row) instanceof SideBySideLineList) {
	final SideBySideLineList pl = (SideBySideLineList) getRowItem(row);
	final short file = (short) ((column - 1) / 2);
	if (column < (1 + file * 2 + 1)) {
	column++;
	}

	final SideBySideLine line = pl.lines.get(file);
	switch (line.getType()) {
	case DELETE:
	case EQUAL:
	case INSERT: {
	createCommentEditor(row + 1, column, line.getLineNumber(), file);
	break;
	}
	}
	}
	}

	@Override
	protected void onOpenItem(final Object item) {
	if (item instanceof SideBySideLineList) {
	final SideBySideLineList pl = (SideBySideLineList) item;
	final short file = (short) (pl.lines.size() - 1);
	final int row = getCurrentRow();
	final int column = 1 + file * 2 + 1;
	final SideBySideLine line = pl.lines.get(file);
	createCommentEditor(row + 1, column, line.getLineNumber(), file);
	return;
	}

	super.onOpenItem(item);
	}

	@Override
	protected void bindDrafts(final List<PatchLineComment> drafts) {
	int[] rows = new int[fileCnt];
	for (final PatchLineComment c : drafts) {
	final int side = fileFor(c);
	if (side < 0 \|\| fileCnt <= side) {
	// We shouldn't have been given this draft; it doesn't display
	// in our current UI layout.
	//
	continue;
	}
	int row = rows[side];
	while (row < table.getRowCount()) {
	if (getRowItem(row) instanceof SideBySideLineList) {
	final SideBySideLineList pl = (SideBySideLineList) getRowItem(row);
	final SideBySideLine line = pl.lines.get(side);
	if (line != null && line.getLineNumber() >= c.getLine()) {
	break;
	}
	}
	row++;
	}
	row++;
	boolean needInsert = true;
	for (int cell = 0; cell < table.getCellCount(row); cell++) {
	final Widget w = table.getWidget(row, cell);
	if (w instanceof CommentEditorPanel
	\|\| w instanceof ComplexDisclosurePanel) {
	needInsert = false;
	break;
	}
	}
	if (needInsert) {
	table.insertRow(row);
	table.getCellFormatter().setStyleName(row, 0, S_ICON_CELL);
	}
	bindComment(row, 1 + side * 2 + 1, c, true);
	rows[side] = row + 1;
	}
	}

	public void display(final SideBySidePatchDetail detail) {
	setPatchKey(detail.getPatch().getKey());
	initVersions(detail.getFileCount());
	setAccountInfoCache(detail.getAccounts());
	fileCnt = detail.getFileCount();
	maxLineNumber = detail.getLineCount();

	List<SideBySideLine> prior = null;

	// Generate the table in HTML, because its quicker than by DOM.
	// This pass does not include the line comments; they need full
	// GWT widgets and are relatively infrequent. We do them later.
	//
	final SafeHtmlBuilder nc = new SafeHtmlBuilder();
	appendHeader(nc);
	for (final List<SideBySideLine> pLine : detail.getLines()) {
	if (skipped(prior, pLine) > 0) {
	appendSkipLine(nc);
	}
	prior = pLine;
	appendFileLine(nc, pLine);
	}
	if (skipped(prior, null) > 0) {
	appendSkipLine(nc);
	}
	resetHtml(nc);

	// Insert the comment widgets now that the table DOM has been
	// parsed out of the HTML by the browser. We also bind each
	// of the row item objects.
	//
	int row = 1;
	prior = null;
	for (final List<SideBySideLine> pLine : detail.getLines()) {
	final int skipCnt = skipped(prior, pLine);
	if (skipCnt > 0) {
	bindSkipLine(row, skipCnt);
	row++;
	}
	prior = pLine;

	setRowItem(row, new SideBySideLineList(pLine));

	final int lineRow = row;
	for (int fileId = 0; fileId < fileCnt; fileId++) {
	final SideBySideLine s = pLine.get(fileId);
	if (s == null) {
	continue;
	}

	final List<PatchLineComment> comments = s.getComments();
	if (comments == null) {
	continue;
	}

	int commentRow = lineRow + 1;
	for (Iterator<PatchLineComment> ci = comments.iterator(); ci.hasNext();) {
	final PatchLineComment c = ci.next();
	boolean needInsert = true;
	for (int cell = 0; cell < table.getCellCount(commentRow); cell++) {
	final Widget w = table.getWidget(commentRow, cell);
	if (w instanceof CommentEditorPanel
	\|\| w instanceof ComplexDisclosurePanel) {
	needInsert = false;
	break;
	}
	}
	if (needInsert) {
	table.insertRow(commentRow);
	table.getCellFormatter().setStyleName(commentRow, 0, S_ICON_CELL);
	}
	table.setWidget(commentRow, 1 + 2 * fileId, null);
	bindComment(commentRow, 1 + 2 * fileId + 1, c, !ci.hasNext());
	commentRow++;
	}
	row = Math.max(row, commentRow - 1);
	}
	row++;
	}
	final int skipCnt = skipped(prior, null);
	if (skipCnt > 0) {
	bindSkipLine(row, skipCnt);
	row++;
	}
	}

	private void appendHeader(final SafeHtmlBuilder m) {
	final String width = (100 / fileCnt) + "%";
	m.openTr();

	m.openTd();
	m.addStyleName(S_ICON_CELL);
	m.addStyleName("FileColumnHeader");
	m.nbsp();
	m.closeTd();

	if (fileCnt == 2) {
	m.openTd();
	m.addStyleName("FileColumnHeader");
	m.addStyleName("LineNumber");
	m.nbsp();
	m.closeTd();

	m.openTd();
	m.setStyleName("FileColumnHeader");
	m.setAttribute("width", width);
	m.append(PatchUtil.C.patchHeaderOld());
	m.closeTd();
	} else {
	for (int fileId = 0; fileId < fileCnt - 1; fileId++) {
	m.openTd();
	m.addStyleName("FileColumnHeader");
	m.addStyleName("LineNumber");
	m.nbsp();
	m.closeTd();

	m.openTd();
	m.setStyleName("FileColumnHeader");
	m.setAttribute("width", width);
	m.append(PatchUtil.M.patchHeaderAncestor(fileId + 1));
	m.closeTd();
	}
	}

	m.openTd();
	m.addStyleName("FileColumnHeader");
	m.addStyleName("LineNumber");
	m.nbsp();
	m.closeTd();

	m.openTd();
	m.setStyleName("FileColumnHeader");
	m.setAttribute("width", width);
	m.append(PatchUtil.C.patchHeaderNew());
	m.closeTd();

	m.closeTr();
	}

	private int skipped(List<SideBySideLine> prior,
	final List<SideBySideLine> pLine) {
	int existCnt = 0;
	int gapCnt = 0;
	int lines = 0;

	if (prior != null && pLine != null) {
	for (int i = 0; i < fileCnt; i++) {
	final SideBySideLine ps = prior.get(i);
	final SideBySideLine cs = pLine.get(i);
	if (ps != null && cs != null) {
	existCnt++;
	if (ps.getLineNumber() + 1 != cs.getLineNumber()) {
	lines =
	Math.max(lines, cs.getLineNumber() - ps.getLineNumber() - 1);
	gapCnt++;
	}
	}
	}
	} else if (prior != null) {
	for (int i = 0; i < fileCnt; i++) {
	final SideBySideLine ps = prior.get(i);
	if (ps != null) {
	existCnt++;
	if (ps.getLineNumber() < maxLineNumber) {
	lines = Math.max(lines, maxLineNumber - ps.getLineNumber() - 1);
	gapCnt++;
	}
	}
	}
	} else {
	for (int i = 0; i < fileCnt; i++) {
	final SideBySideLine cs = pLine.get(i);
	if (cs != null) {
	existCnt++;
	if (1 != cs.getLineNumber()) {
	lines = Math.max(lines, cs.getLineNumber() - 1);
	gapCnt++;
	}
	}
	}
	}
	return existCnt == gapCnt ? lines : 0;
	}

	private void appendSkipLine(final SafeHtmlBuilder m) {
	m.openTr();

	m.openTd();
	m.setStyleName(S_ICON_CELL);
	m.nbsp();
	m.closeTd();

	m.openTd();
	m.setStyleName("SkipLine");
	m.setAttribute("colspan", fileCnt * 2);
	m.closeTd();
	m.closeTr();
	}

	private void bindSkipLine(int row, final int skipCnt) {
	final FlowPanel skipPanel = new FlowPanel();
	skipPanel.add(new InlineLabel(PatchUtil.M.patchSkipRegion(skipCnt)));
	table.setWidget(row, 1, skipPanel);
	}

	private void appendFileLine(final SafeHtmlBuilder m,
	final List<SideBySideLine> line) {
	m.openTr();
	m.setAttribute("valign", "top");

	m.openTd();
	m.setStyleName(S_ICON_CELL);
	m.nbsp();
	m.closeTd();

	for (int fileId = 0; fileId < fileCnt; fileId++) {
	final SideBySideLine s = line.get(fileId);
	if (s != null) {
	m.openTd();
	m.setStyleName("LineNumber");
	m.append(s.getLineNumber());
	m.closeTd();

	m.openTd();
	m.addStyleName("FileLine");
	m.addStyleName("FileLine-" + s.getType().name());
	if (!"".equals(s.getText())) {
	boolean showWhitespaceErrors = false;
	if (fileId == fileCnt - 1
	&& s.getType() == SideBySideLine.Type.INSERT) {
	// Only show whitespace errors in the last column, and
	// only if the line is introduced here.
	//
	showWhitespaceErrors = true;
	}
	m.append(PatchUtil.lineToSafeHtml(s.getText(),
	PatchUtil.DEFAULT_LINE_LENGTH, showWhitespaceErrors));
	} else {
	m.nbsp();
	}
	m.closeTd();
	} else {
	m.openTd();
	m.setStyleName("LineNumber");
	m.nbsp();
	m.closeTd();

	m.openTd();
	m.addStyleName("FileLine");
	m.addStyleName("FileLineNone");
	m.nbsp();
	m.closeTd();
	}
	}

	m.closeTr();
	}

	private static class SideBySideLineList {
	final List<SideBySideLine> lines;

	SideBySideLineList(final List<SideBySideLine> a) {
	lines = a;
	}
	}
	}