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helpers/tcell_borders.go
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180
helpers/tcell_borders.go
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/*
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Copyright © Brian Buller <brian@bullercodeworks.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package helpers
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import (
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"github.com/gdamore/tcell"
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)
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/*
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The Border template starts at North and goes clockwise:
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─, ┐, │, ┘, ─, └, │, ┌
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Then it has the crossing lines:
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├, ─, ┤, ┬, │, ┴
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So a full border might look like this:
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[]rune{
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'─', '┐', '│', '┘', '─', '└', '│', '┌',
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'├', '─', '┤', '┬', '│', '┴',
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}
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U+250x ─ ━ │ ┃ ┄ ┅ ┆ ┇ ┈ ┉ ┊ ┋ ┌ ┍ ┎ ┏
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U+251x ┐ ┑ ┒ ┓ └ ┕ ┖ ┗ ┘ ┙ ┚ ┛ ├ ┝ ┞ ┟
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U+252x ┠ ┡ ┢ ┣ ┤ ┥ ┦ ┧ ┨ ┩ ┪ ┫ ┬ ┭ ┮ ┯
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U+253x ┰ ┱ ┲ ┳ ┴ ┵ ┶ ┷ ┸ ┹ ┺ ┻ ┼ ┽ ┾ ┿
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U+254x ╀ ╁ ╂ ╃ ╄ ╅ ╆ ╇ ╈ ╉ ╊ ╋ ╌ ╍ ╎ ╏
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U+255x ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟
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U+256x ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ ╭ ╮ ╯
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U+257x ╰ ╱ ╲ ╳ ╴ ╵ ╶ ╷ ╸ ╹ ╺ ╻ ╼ ╽ ╾ ╿
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*/
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const (
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BRD_N = iota
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BRD_NE
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BRD_E
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BRD_SE
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BRD_S
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BRD_SW
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BRD_W
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BRD_NW
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BRD_CROSS_E
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BRD_CROSS_H
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BRD_CROSS_W
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BRD_CROSS_S
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BRD_CROSS_V
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BRD_CROSS_N
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BRD_CROSS_ALL
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)
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var (
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BRD_SIMPLE = []rune{'─', '┐', '│', '┘', '─', '└', '│', '┌', '├', '─', '┤', '┬', '│', '┴', '┼'}
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BRD_CSIMPLE = []rune{'─', '╮', '│', '╯', '─', '╰', '│', '╭', '├', '─', '┤', '┬', '│', '┴', '┼'}
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BRD_DOUBLE = []rune{'═', '╗', '║', '╝', '═', '╚', '║', '╔', '╠', '═', '╣', '╦', '║', '╩', '╬'}
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BRD_CSIMPLE_DOTSPLIT = []rune{'─', '╮', '│', '╯', '─', '╰', '│', '╭', '├', '┄', '┤', '┬', '┊', '┴', '┼'}
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BRD_BLOCK_SHADOW = []rune{'░', '░', '▓', '▓', '▓', '░', '░', '░', '░', '░', '░', '░', '░', '░', '░'}
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)
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// Horizontal/Vertical Rules
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const (
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RULE_START = iota
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RULE_FILL
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RULE_END
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)
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var (
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HRULE_SIMPLE = []rune{'├', '─', '┤'}
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HRULE_DOUBLE = []rune{'╠', '═', '╣'}
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VRULE_SIMPLE = []rune{'┬', '│', '┴'}
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VRULE_DOUBLE = []rune{'╦', '║', '╩'}
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)
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func ValidateBorder(border []rune) []rune {
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for len(border) < BRD_CROSS_ALL+1 {
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border = append(border, ' ')
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}
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return border
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}
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func ValidateRule(rule []rune) []rune {
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for len(rule) < RULE_END+1 {
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rule = append(rule, ' ')
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}
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return rule
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}
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func HRule(x1, x2, y int, rule []rune, s tcell.Style, screen tcell.Screen) {
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Fill(x1, y, x2, y, rule[RULE_FILL], s, screen)
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screen.SetContent(x1, y, rule[RULE_START], nil, s)
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screen.SetContent(x2, y, rule[RULE_END], nil, s)
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}
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func VRule(x, y1, y2 int, rule []rune, s tcell.Style, screen tcell.Screen) {
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Fill(x, y1, x, y2, rule[RULE_FILL], s, screen)
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screen.SetContent(x, y1, rule[RULE_START], nil, s)
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screen.SetContent(x, y2, rule[RULE_END], nil, s)
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}
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func BorderFilled(x1, y1, x2, y2 int, border []rune, s tcell.Style, screen tcell.Screen) {
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Border(x1, y1, x2, y2, border, s, screen)
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Fill(x1+1, y1+1, x2-1, y2-1, ' ', s, screen)
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}
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func Border(x1, y1, x2, y2 int, border []rune, s tcell.Style, screen tcell.Screen) {
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border = ValidateBorder(border)
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Fill(x1+1, y1, x2-1, y1, border[BRD_N], s, screen)
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Fill(x2, y1+1, x2, y2-1, border[BRD_E], s, screen)
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Fill(x1+1, y2, x2-1, y2, border[BRD_S], s, screen)
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Fill(x1, y1+1, x1, y2-1, border[BRD_W], s, screen)
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screen.SetContent(x1, y1, border[BRD_NW], nil, s)
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screen.SetContent(x2, y1, border[BRD_NE], nil, s)
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screen.SetContent(x1, y2, border[BRD_SW], nil, s)
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screen.SetContent(x2, y2, border[BRD_SE], nil, s)
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}
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func TitledBorderFilled(x1, y1, x2, y2 int, ttl string, border []rune, s tcell.Style, screen tcell.Screen) {
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TitledBorder(x1, y1, x2, y2, ttl, border, s, screen)
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Fill(x1+1, y1+1, x2-1, y2-1, ' ', s, screen)
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}
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func TitledBorder(x1, y1, x2, y2 int, ttl string, border []rune, s tcell.Style, screen tcell.Screen) {
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if ttl == "" {
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Border(x1, y1, x2, y2, border, s, screen)
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return
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}
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border = ValidateBorder(border)
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ttlLength, maxTtlLength := len(ttl), (x2 - x1 - 2)
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if ttlLength > maxTtlLength {
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if maxTtlLength-3 > 0 {
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ttlLength = maxTtlLength
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ttl = ttl[0:maxTtlLength-3] + "..."
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}
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}
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DrawText(x1+1, y1, ttl, s, screen)
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Fill(x1+1+ttlLength, y1, x2-1, y1, border[BRD_N], s, screen)
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Fill(x2, y1+1, x2, y2-1, border[BRD_E], s, screen)
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Fill(x1+1, y2, x2-1, y2, border[BRD_S], s, screen)
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Fill(x1, y1+1, x1, y2-1, border[BRD_W], s, screen)
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screen.SetContent(x1, y1, border[BRD_NW], nil, s)
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screen.SetContent(x2, y1, border[BRD_NE], nil, s)
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screen.SetContent(x1, y2, border[BRD_SW], nil, s)
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screen.SetContent(x2, y2, border[BRD_SE], nil, s)
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}
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func BorderHasEast(border []rune) bool {
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border = ValidateBorder(border)
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return border[BRD_E] != ' ' || border[BRD_NE] != ' ' || border[BRD_SE] != ' '
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}
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func BorderHasWest(border []rune) bool {
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border = ValidateBorder(border)
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return border[BRD_W] != ' ' || border[BRD_NW] != ' ' || border[BRD_SW] != ' '
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}
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func BorderHasNorth(border []rune) bool {
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border = ValidateBorder(border)
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return border[BRD_N] != ' ' || border[BRD_NE] != ' ' || border[BRD_NW] != ' '
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}
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func BorderHasSouth(border []rune) bool {
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border = ValidateBorder(border)
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return border[BRD_S] != ' ' || border[BRD_NW] != ' ' || border[BRD_SW] != ' '
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}
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