Buffers ?!

buffer.go

@@ -0,0 +1,140 @@
+/*
+Copyright © Brian Buller <brian@bullercodeworks.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+package widgets
+
+import (
+	h "git.bullercodeworks.com/brian/tcell-widgets/helpers"
+	"github.com/gdamore/tcell"
+)
+
+type Buffer struct {
+	// cells [][]Cell
+	cells      map[Coord]Cell
+	maxX, maxY int
+	minX, minY int
+}
+
+func NewBuffer() Buffer {
+	return Buffer{cells: make(map[Coord]Cell)}
+}
+
+func (b *Buffer) Width() int  { return b.maxX - b.minX }
+func (b *Buffer) Height() int { return b.maxY - b.minY }
+
+func (b *Buffer) Draw(x, y int, screen tcell.Screen) {
+	for crd, cell := range b.cells {
+		cell.Draw(x+crd.X, y+crd.Y, screen)
+	}
+}
+
+func (b *Buffer) SetCell(x, y int, c Cell) {
+	b.cells[Coord{X: x, Y: y}] = c
+	b.maxX, b.maxY = h.Max(b.maxX, x), h.Max(b.maxY, y)
+	b.minX, b.minY = h.Min(b.minX, x), h.Min(b.minY, y)
+}
+
+func (b *Buffer) SetCells(x, y int, c [][]Cell) {
+	for i := range c {
+		for j := range c[i] {
+			b.SetCell(x+j, y+i, c[i][j])
+		}
+	}
+}
+
+// Buffer Helpers
+func (b *Buffer) FillText(x, y int, txt string, style tcell.Style) {
+	for i := range txt {
+		b.SetCell(x+i, y, *NewCell(rune(txt[i]), style))
+	}
+}
+
+func (b *Buffer) Fill(x1, y1, x2, y2 int, r rune, style tcell.Style) {
+	if x1 > x2 {
+		x1, x2 = x2, x1
+	}
+	if y1 > y2 {
+		y1, y2 = y2, y1
+	}
+	for x := x1; x <= x2; x++ {
+		for y := y1; y <= y2; y++ {
+			b.SetCell(x, y, *NewCell(r, style))
+		}
+	}
+}
+
+func (b *Buffer) HRule(x1, x2, y int, rule []rune, s tcell.Style) {
+	b.Fill(x1, y, x2, y, rule[h.RULE_FILL], s)
+	b.SetCell(x1, y, *NewCell(rule[h.RULE_START], s))
+	b.SetCell(x2, y, *NewCell(rule[h.RULE_END], s))
+}
+
+func (b *Buffer) VRule(x, y1, y2 int, rule []rune, s tcell.Style) {
+	b.Fill(x, y1, x, y2, rule[h.RULE_FILL], s)
+	b.SetCell(x, y1, *NewCell(rule[h.RULE_START], s))
+	b.SetCell(x, y2, *NewCell(rule[h.RULE_END], s))
+}
+
+func (b *Buffer) BorderFilled(x1, y1, x2, y2 int, border []rune, s tcell.Style) {
+	b.Border(x1, y1, x2, y2, border, s)
+	b.Fill(x1+1, y1+1, x2-1, y2-1, ' ', s)
+}
+
+func (b *Buffer) Border(x1, y1, x2, y2 int, border []rune, s tcell.Style) {
+	border = h.ValidateBorder(border)
+	b.Fill(x1+1, y1, x2-1, y1, border[h.BRD_N], s)
+	b.Fill(x2, y1+1, x2, y2-1, border[h.BRD_E], s)
+	b.Fill(x1+1, y2, x2-1, y2, border[h.BRD_S], s)
+	b.Fill(x1, y1+1, x1, y2-1, border[h.BRD_W], s)
+	b.SetCell(x1, y1, *NewCell(border[h.BRD_NW], s))
+	b.SetCell(x2, y1, *NewCell(border[h.BRD_NE], s))
+	b.SetCell(x1, y2, *NewCell(border[h.BRD_SW], s))
+	b.SetCell(x2, y2, *NewCell(border[h.BRD_SE], s))
+}
+
+func (b *Buffer) TitledBorderFilled(x1, y1, x2, y2 int, ttl string, border []rune, s tcell.Style) {
+	b.TitledBorder(x1, y1, x2, y2, ttl, border, s)
+	b.Fill(x1+1, y1+1, x2-1, y2-1, ' ', s)
+}
+
+func (b *Buffer) TitledBorder(x1, y1, x2, y2 int, ttl string, border []rune, s tcell.Style) {
+	if ttl == "" {
+		b.Border(x1, y1, x2, y2, border, s)
+		return
+	}
+	border = h.ValidateBorder(border)
+	ttlLength, maxTtlLength := len(ttl), (x2 - x1 - 2)
+	if ttlLength > maxTtlLength {
+		if maxTtlLength-3 > 0 {
+			ttlLength = maxTtlLength
+			ttl = ttl[0:maxTtlLength-3] + "..."
+		}
+	}
+	b.FillText(x1+1, y1, ttl, s)
+	b.Fill(x1+1+ttlLength, y1, x2-1, y1, border[h.BRD_N], s)
+	b.Fill(x2, y1+1, x2, y2-1, border[h.BRD_E], s)
+	b.Fill(x1+1, y2, x2-1, y2, border[h.BRD_S], s)
+	b.Fill(x1, y1+1, x1, y2-1, border[h.BRD_W], s)
+	b.SetCell(x1, y1, *NewCell(border[h.BRD_NW], s))
+	b.SetCell(x2, y1, *NewCell(border[h.BRD_NE], s))
+	b.SetCell(x1, y2, *NewCell(border[h.BRD_SW], s))
+	b.SetCell(x2, y2, *NewCell(border[h.BRD_SE], s))
+}