223 lines
4.1 KiB
Go
223 lines
4.1 KiB
Go
// gomuks - A terminal Matrix client written in Go.
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// Copyright (C) 2020 Tulir Asokan
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package widget
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import (
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"fmt"
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"hash/fnv"
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"maunium.net/go/tcell"
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"maunium.net/go/mautrix/id"
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)
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var colorNames = []string{
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"maroon",
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"green",
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"olive",
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"navy",
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"purple",
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"teal",
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"silver",
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"gray",
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"red",
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"lime",
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"yellow",
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"blue",
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"fuchsia",
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"aqua",
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"white",
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"aliceblue",
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"antiquewhite",
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"aquamarine",
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"azure",
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"beige",
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"bisque",
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"blanchedalmond",
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"blueviolet",
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"brown",
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"burlywood",
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"cadetblue",
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"chartreuse",
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"chocolate",
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"coral",
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"cornflowerblue",
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"cornsilk",
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"crimson",
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"darkblue",
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"darkcyan",
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"darkgoldenrod",
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"darkgray",
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"darkgreen",
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"darkkhaki",
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"darkmagenta",
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"darkolivegreen",
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"darkorange",
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"darkorchid",
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"darkred",
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"darksalmon",
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"darkseagreen",
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"darkslateblue",
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"darkslategray",
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"darkturquoise",
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"darkviolet",
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"deeppink",
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"deepskyblue",
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"dimgray",
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"dodgerblue",
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"firebrick",
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"floralwhite",
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"forestgreen",
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"gainsboro",
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"ghostwhite",
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"gold",
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"goldenrod",
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"greenyellow",
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"honeydew",
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"hotpink",
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"indianred",
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"indigo",
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"ivory",
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"khaki",
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"lavender",
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"lavenderblush",
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"lawngreen",
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"lemonchiffon",
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"lightblue",
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"lightcoral",
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"lightcyan",
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"lightgoldenrodyellow",
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"lightgray",
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"lightgreen",
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"lightpink",
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"lightsalmon",
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"lightseagreen",
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"lightskyblue",
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"lightslategray",
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"lightsteelblue",
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"lightyellow",
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"limegreen",
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"linen",
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"mediumaquamarine",
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"mediumblue",
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"mediumorchid",
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"mediumpurple",
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"mediumseagreen",
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"mediumslateblue",
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"mediumspringgreen",
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"mediumturquoise",
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"mediumvioletred",
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"midnightblue",
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"mintcream",
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"mistyrose",
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"moccasin",
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"navajowhite",
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"oldlace",
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"olivedrab",
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"orange",
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"orangered",
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"orchid",
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"palegoldenrod",
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"palegreen",
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"paleturquoise",
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"palevioletred",
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"papayawhip",
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"peachpuff",
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"peru",
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"pink",
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"plum",
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"powderblue",
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"rebeccapurple",
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"rosybrown",
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"royalblue",
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"saddlebrown",
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"salmon",
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"sandybrown",
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"seagreen",
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"seashell",
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"sienna",
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"skyblue",
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"slateblue",
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"slategray",
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"snow",
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"springgreen",
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"steelblue",
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"tan",
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"thistle",
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"tomato",
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"turquoise",
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"violet",
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"wheat",
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"whitesmoke",
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"yellowgreen",
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"grey",
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"dimgrey",
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"darkgrey",
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"darkslategrey",
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"lightgrey",
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"lightslategrey",
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"slategrey",
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}
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// GetHashColorName gets a color name for the given string based on its FNV-1 hash.
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//
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// The array of possible color names are the alphabetically ordered color
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// names specified in tcell.ColorNames.
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//
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// The algorithm to get the color is as follows:
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// colorNames[ FNV1(string) % len(colorNames) ]
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//
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// With the exception of the three special cases:
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// --> = green
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// <-- = red
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// --- = yellow
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func GetHashColorName(s string) string {
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switch s {
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case "-->":
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return "green"
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case "<--":
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return "red"
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case "---":
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return "yellow"
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default:
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h := fnv.New32a()
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_, _ = h.Write([]byte(s))
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return colorNames[h.Sum32()%uint32(len(colorNames))]
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}
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}
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// GetHashColor gets the tcell Color value for the given string.
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//
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// GetHashColor calls GetHashColorName() and gets the Color value from the tcell.ColorNames map.
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func GetHashColor(val interface{}) tcell.Color {
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switch str := val.(type) {
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case string:
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return tcell.ColorNames[GetHashColorName(str)]
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case *string:
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return tcell.ColorNames[GetHashColorName(*str)]
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case id.UserID:
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return tcell.ColorNames[GetHashColorName(string(str))]
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default:
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return tcell.ColorNames["red"]
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}
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}
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// AddColor adds tview color tags to the given string.
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func AddColor(s, color string) string {
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return fmt.Sprintf("[%s]%s[white]", color, s)
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}
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