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// Copyright 2015 The TCell Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use 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 tcell
// The names of these constants are chosen to match Terminfo names,
// modulo case, and changing the prefix from ACS_ to Rune. These are
// the runes we provide extra special handling for, with ASCII fallbacks
// for terminals that lack them.
const (
RuneSterling = '£'
RuneDArrow = '↓'
RuneLArrow = '←'
RuneRArrow = '→'
RuneUArrow = '↑'
RuneBullet = '·'
RuneBoard = '░'
RuneCkBoard = '▒'
RuneDegree = '°'
RuneDiamond = '◆'
RuneGEqual = '≥'
RunePi = 'π'
RuneHLine = '─'
RuneLantern = '§'
RunePlus = '┼'
RuneLEqual = '≤'
RuneLLCorner = '└'
RuneLRCorner = '┘'
RuneNEqual = '≠'
RunePlMinus = '±'
RuneS1 = '⎺'
RuneS3 = '⎻'
RuneS7 = '⎼'
RuneS9 = '⎽'
RuneBlock = '█'
RuneTTee = '┬'
RuneRTee = '┤'
RuneLTee = '├'
RuneBTee = '┴'
RuneULCorner = '┌'
RuneURCorner = '┐'
RuneVLine = '│'
)
// RuneFallbacks is the default map of fallback strings that will be
// used to replace a rune when no other more appropriate transformation
// is available, and the rune cannot be displayed directly.
//
// New entries may be added to this map over time, as it becomes clear
// that such is desirable. Characters that represent either letters or
// numbers should not be added to this list unless it is certain that
// the meaning will still convey unambiguously.
//
// As an example, it would be appropriate to add an ASCII mapping for
// the full width form of the letter 'A', but it would not be appropriate
// to do so a glyph representing the country China.
//
// Programs that desire richer fallbacks may register additional ones,
// or change or even remove these mappings with Screen.RegisterRuneFallback
// Screen.UnregisterRuneFallback methods.
//
// Note that Unicode is presumed to be able to display all glyphs.
// This is a pretty poor assumption, but there is no easy way to
// figure out which glyphs are supported in a given font. Hence,
// some care in selecting the characters you support in your application
// is still appropriate.
var RuneFallbacks = map[rune]string{
RuneSterling: "f",
RuneDArrow: "v",
RuneLArrow: "<",
RuneRArrow: ">",
RuneUArrow: "^",
RuneBullet: "o",
RuneBoard: "#",
RuneCkBoard: ":",
RuneDegree: "\\",
RuneDiamond: "+",
RuneGEqual: ">",
RunePi: "*",
RuneHLine: "-",
RuneLantern: "#",
RunePlus: "+",
RuneLEqual: "<",
RuneLLCorner: "+",
RuneLRCorner: "+",
RuneNEqual: "!",
RunePlMinus: "#",
RuneS1: "~",
RuneS3: "-",
RuneS7: "-",
RuneS9: "_",
RuneBlock: "#",
RuneTTee: "+",
RuneRTee: "+",
RuneLTee: "+",
RuneBTee: "+",
RuneULCorner: "+",
RuneURCorner: "+",
RuneVLine: "|",
}
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