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// Copyright (C) 2016 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.
(function(window, GrDiffLine) {
'use strict';
// Prevent redefinition.
if (window.GrDiffGroup) { return; }
function GrDiffGroup(type, opt_lines) {
this.type = type;
this.lines = [];
this.adds = [];
this.removes = [];
this.lineRange = {
left: {start: null, end: null},
right: {start: null, end: null},
};
if (opt_lines) {
opt_lines.forEach(this.addLine, this);
}
}
GrDiffGroup.prototype.element = null;
GrDiffGroup.Type = {
BOTH: 'both',
CONTEXT_CONTROL: 'contextControl',
DELTA: 'delta',
};
GrDiffGroup.prototype.addLine = function(line) {
this.lines.push(line);
var notDelta = (this.type === GrDiffGroup.Type.BOTH ||
this.type === GrDiffGroup.Type.CONTEXT_CONTROL);
if (notDelta && (line.type === GrDiffLine.Type.ADD ||
line.type === GrDiffLine.Type.REMOVE)) {
throw Error('Cannot add delta line to a non-delta group.');
}
if (line.type === GrDiffLine.Type.ADD) {
this.adds.push(line);
} else if (line.type === GrDiffLine.Type.REMOVE) {
this.removes.push(line);
}
this._updateRange(line);
};
GrDiffGroup.prototype.getSideBySidePairs = function() {
if (this.type === GrDiffGroup.Type.BOTH ||
this.type === GrDiffGroup.Type.CONTEXT_CONTROL) {
return this.lines.map(function(line) {
return {
left: line,
right: line,
};
});
}
var pairs = [];
var i = 0;
var j = 0;
while (i < this.removes.length || j < this.adds.length) {
pairs.push({
left: this.removes[i] || GrDiffLine.BLANK_LINE,
right: this.adds[j] || GrDiffLine.BLANK_LINE,
});
i++;
j++;
}
return pairs;
};
GrDiffGroup.prototype._updateRange = function(line) {
if (line.beforeNumber === 'FILE' || line.afterNumber === 'FILE') { return; }
if (line.type === GrDiffLine.Type.ADD ||
line.type === GrDiffLine.Type.BOTH) {
if (this.lineRange.right.start === null ||
line.afterNumber < this.lineRange.right.start) {
this.lineRange.right.start = line.afterNumber;
}
if (this.lineRange.right.end === null ||
line.afterNumber > this.lineRange.right.end) {
this.lineRange.right.end = line.afterNumber;
}
}
if (line.type === GrDiffLine.Type.REMOVE ||
line.type === GrDiffLine.Type.BOTH) {
if (this.lineRange.left.start === null ||
line.beforeNumber < this.lineRange.left.start) {
this.lineRange.left.start = line.beforeNumber;
}
if (this.lineRange.left.end === null ||
line.beforeNumber > this.lineRange.left.end) {
this.lineRange.left.end = line.beforeNumber;
}
}
};
window.GrDiffGroup = GrDiffGroup;
})(window, GrDiffLine);
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