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Merge pull request #102 from mum4k/release-0-6-0
Release 0.6.0
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| # Changelog | ||
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| All notable changes to this project are documented here. | ||
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| The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), | ||
| and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). | ||
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| ## [Unreleased] | ||
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| ## [0.6.0] - 07-Feb-2019 | ||
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| ### Added | ||
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| - The SegmentDisplay widget. | ||
| - A CHANGELOG. | ||
| - New line styles for borders. | ||
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| ### Changed | ||
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| - Better recordings of the individual demos. | ||
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| ### Fixed | ||
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| - The LineChart now has an option to change the behavior of the Y axis from | ||
| zero anchored to adaptive. | ||
| - Lint errors reported on the Go report card. | ||
| - Widgets now correctly handle a race when new user data are supplied between | ||
| calls to their Options() and Draw() methods. | ||
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| ## [0.5.0] - 21-Jan-2019 | ||
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| ### Added | ||
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| - Draw primitives for drawing circles. | ||
| - The Donut widget. | ||
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| ### Fixed | ||
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| - Bugfixes in the braille canvas. | ||
| - Lint errors reported on the Go report card. | ||
| - Flaky behavior in termdash_test. | ||
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| ## [0.4.0] - 15-Jan-2019 | ||
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| ### Added | ||
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| - 256 color support. | ||
| - Variable size container splits. | ||
| - A more complete demo of the functionality. | ||
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| ### Changed | ||
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| - Updated documentation and README. | ||
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| ## [0.3.0] - 13-Jan-2019 | ||
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| ### Added | ||
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| - Primitives for drawing lines. | ||
| - Implementation of a Braille canvas. | ||
| - The LineChart widget. | ||
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| ## [0.2.0] - 02-Jul-2018 | ||
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| ### Added | ||
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| - The SparkLine widget. | ||
| - The BarChart widget. | ||
| - Manually triggered redraw. | ||
| - Travis now checks for presence of licence headers. | ||
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| ### Fixed | ||
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| - Fixing races in termdash_test. | ||
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| ## 0.1.0 - 13-Jun-2018 | ||
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| ### Added | ||
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| - Documentation of the project and its goals. | ||
| - Drawing infrastructure. | ||
| - Testing infrastructure. | ||
| - The Gauge widget. | ||
| - The Text widget. | ||
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| [Unreleased]: https://github.com/mum4k/termdash/compare/v0.6.0...devel | ||
| [0.6.0]: https://github.com/mum4k/termdash/compare/v0.5.0...v0.6.0 | ||
| [0.5.0]: https://github.com/mum4k/termdash/compare/v0.4.0...v0.5.0 | ||
| [0.4.0]: https://github.com/mum4k/termdash/compare/v0.3.0...v0.4.0 | ||
| [0.3.0]: https://github.com/mum4k/termdash/compare/v0.2.0...v0.3.0 | ||
| [0.2.0]: https://github.com/mum4k/termdash/compare/v0.1.0...v0.2.0 |
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| // Copyright 2019 Google Inc. | ||
| // | ||
| // 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. | ||
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| // Package attrrange simplifies tracking of attributes that apply to a range of | ||
| // items. | ||
| // Refer to the examples if the test file for details on usage. | ||
| package attrrange | ||
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| import ( | ||
| "fmt" | ||
| "sort" | ||
| ) | ||
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| // AttrRange is a range of items that share the same attributes. | ||
| type AttrRange struct { | ||
| // Low is the first position where these attributes apply. | ||
| Low int | ||
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| // High is the end of the range. The attributes apply to all items in range | ||
| // Low <= b < high. | ||
| High int | ||
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| // AttrIdx is the index of the attributes that apply to this range. | ||
| AttrIdx int | ||
| } | ||
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| // newAttrRange returns a new AttrRange instance. | ||
| func newAttrRange(low, high, attrIdx int) *AttrRange { | ||
| return &AttrRange{ | ||
| Low: low, | ||
| High: high, | ||
| AttrIdx: attrIdx, | ||
| } | ||
| } | ||
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| // Tracker tracks attributes that apply to a range of items. | ||
| // This object is not thread safe. | ||
| type Tracker struct { | ||
| // ranges maps low indices of ranges to the attribute ranges. | ||
| ranges map[int]*AttrRange | ||
| } | ||
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| // NewTracker returns a new tracker of ranges that share the same attributes. | ||
| func NewTracker() *Tracker { | ||
| return &Tracker{ | ||
| ranges: map[int]*AttrRange{}, | ||
| } | ||
| } | ||
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| // Add adds a new range of items that share attributes with the specified | ||
| // index. | ||
| // The low position of the range must not overlap with low position of any | ||
| // existing range. | ||
| func (t *Tracker) Add(low, high, attrIdx int) error { | ||
| ar := newAttrRange(low, high, attrIdx) | ||
| if ar, ok := t.ranges[low]; ok { | ||
| return fmt.Errorf("already have range starting on low:%d, existing:%+v", low, ar) | ||
| } | ||
| t.ranges[low] = ar | ||
| return nil | ||
| } | ||
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| // ForPosition returns attribute index that apply to the specified position. | ||
| // Returns ErrNotFound when the requested position wasn't found in any of the | ||
| // known ranges. | ||
| func (t *Tracker) ForPosition(pos int) (*AttrRange, error) { | ||
| if ar, ok := t.ranges[pos]; ok { | ||
| return ar, nil | ||
| } | ||
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| var keys []int | ||
| for k := range t.ranges { | ||
| keys = append(keys, k) | ||
| } | ||
| sort.Ints(keys) | ||
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| var res *AttrRange | ||
| for _, k := range keys { | ||
| ar := t.ranges[k] | ||
| if ar.Low > pos { | ||
| break | ||
| } | ||
| if ar.High > pos { | ||
| res = ar | ||
| } | ||
| } | ||
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| if res == nil { | ||
| return nil, fmt.Errorf("did not find attribute range for position %d", pos) | ||
| } | ||
| return res, nil | ||
| } |
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