111 lines
3.3 KiB
Go
111 lines
3.3 KiB
Go
// Copyright 2015 The TCell Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use file except in compliance with the License.
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// You may obtain a copy of the license at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tcell
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// The names of these constants are chosen to match Terminfo names,
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// modulo case, and changing the prefix from ACS_ to Rune. These are
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// the runes we provide extra special handling for, with ASCII fallbacks
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// for terminals that lack them.
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const (
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RuneSterling = '£'
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RuneDArrow = '↓'
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RuneLArrow = '←'
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RuneRArrow = '→'
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RuneUArrow = '↑'
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RuneBullet = '·'
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RuneBoard = '░'
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RuneCkBoard = '▒'
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RuneDegree = '°'
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RuneDiamond = '◆'
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RuneGEqual = '≥'
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RunePi = 'π'
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RuneHLine = '─'
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RuneLantern = '§'
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RunePlus = '┼'
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RuneLEqual = '≤'
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RuneLLCorner = '└'
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RuneLRCorner = '┘'
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RuneNEqual = '≠'
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RunePlMinus = '±'
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RuneS1 = '⎺'
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RuneS3 = '⎻'
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RuneS7 = '⎼'
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RuneS9 = '⎽'
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RuneBlock = '█'
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RuneTTee = '┬'
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RuneRTee = '┤'
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RuneLTee = '├'
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RuneBTee = '┴'
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RuneULCorner = '┌'
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RuneURCorner = '┐'
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RuneVLine = '│'
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)
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// RuneFallbacks is the default map of fallback strings that will be
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// used to replace a rune when no other more appropriate transformation
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// is available, and the rune cannot be displayed directly.
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//
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// New entries may be added to this map over time, as it becomes clear
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// that such is desirable. Characters that represent either letters or
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// numbers should not be added to this list unless it is certain that
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// the meaning will still convey unambiguously.
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//
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// As an example, it would be appropriate to add an ASCII mapping for
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// the full width form of the letter 'A', but it would not be appropriate
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// to do so a glyph representing the country China.
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//
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// Programs that desire richer fallbacks may register additional ones,
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// or change or even remove these mappings with Screen.RegisterRuneFallback
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// Screen.UnregisterRuneFallback methods.
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//
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// Note that Unicode is presumed to be able to display all glyphs.
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// This is a pretty poor assumption, but there is no easy way to
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// figure out which glyphs are supported in a given font. Hence,
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// some care in selecting the characters you support in your application
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// is still appropriate.
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var RuneFallbacks = map[rune]string{
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RuneSterling: "f",
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RuneDArrow: "v",
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RuneLArrow: "<",
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RuneRArrow: ">",
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RuneUArrow: "^",
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RuneBullet: "o",
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RuneBoard: "#",
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RuneCkBoard: ":",
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RuneDegree: "\\",
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RuneDiamond: "+",
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RuneGEqual: ">",
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RunePi: "*",
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RuneHLine: "-",
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RuneLantern: "#",
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RunePlus: "+",
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RuneLEqual: "<",
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RuneLLCorner: "+",
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RuneLRCorner: "+",
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RuneNEqual: "!",
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RunePlMinus: "#",
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RuneS1: "~",
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RuneS3: "-",
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RuneS7: "-",
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RuneS9: "_",
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RuneBlock: "#",
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RuneTTee: "+",
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RuneRTee: "+",
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RuneLTee: "+",
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RuneBTee: "+",
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RuneULCorner: "+",
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RuneURCorner: "+",
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RuneVLine: "|",
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}
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