go-pulse/vendor/github.com/gizak/termui/grid.go
Péter Szilágyi 289b30715d Godeps, vendor: convert dependency management to trash (#3198)
This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.
2016-10-28 19:05:01 +02:00

280 lines
5.3 KiB
Go

// Copyright 2016 Zack Guo <gizak@icloud.com>. All rights reserved.
// Use of this source code is governed by a MIT license that can
// be found in the LICENSE file.
package termui
// GridBufferer introduces a Bufferer that can be manipulated by Grid.
type GridBufferer interface {
Bufferer
GetHeight() int
SetWidth(int)
SetX(int)
SetY(int)
}
// Row builds a layout tree
type Row struct {
Cols []*Row //children
Widget GridBufferer // root
X int
Y int
Width int
Height int
Span int
Offset int
}
// calculate and set the underlying layout tree's x, y, height and width.
func (r *Row) calcLayout() {
r.assignWidth(r.Width)
r.Height = r.solveHeight()
r.assignX(r.X)
r.assignY(r.Y)
}
// tell if the node is leaf in the tree.
func (r *Row) isLeaf() bool {
return r.Cols == nil || len(r.Cols) == 0
}
func (r *Row) isRenderableLeaf() bool {
return r.isLeaf() && r.Widget != nil
}
// assign widgets' (and their parent rows') width recursively.
func (r *Row) assignWidth(w int) {
r.SetWidth(w)
accW := 0 // acc span and offset
calcW := make([]int, len(r.Cols)) // calculated width
calcOftX := make([]int, len(r.Cols)) // computated start position of x
for i, c := range r.Cols {
accW += c.Span + c.Offset
cw := int(float64(c.Span*r.Width) / 12.0)
if i >= 1 {
calcOftX[i] = calcOftX[i-1] +
calcW[i-1] +
int(float64(r.Cols[i-1].Offset*r.Width)/12.0)
}
// use up the space if it is the last col
if i == len(r.Cols)-1 && accW == 12 {
cw = r.Width - calcOftX[i]
}
calcW[i] = cw
r.Cols[i].assignWidth(cw)
}
}
// bottom up calc and set rows' (and their widgets') height,
// return r's total height.
func (r *Row) solveHeight() int {
if r.isRenderableLeaf() {
r.Height = r.Widget.GetHeight()
return r.Widget.GetHeight()
}
maxh := 0
if !r.isLeaf() {
for _, c := range r.Cols {
nh := c.solveHeight()
// when embed rows in Cols, row widgets stack up
if r.Widget != nil {
nh += r.Widget.GetHeight()
}
if nh > maxh {
maxh = nh
}
}
}
r.Height = maxh
return maxh
}
// recursively assign x position for r tree.
func (r *Row) assignX(x int) {
r.SetX(x)
if !r.isLeaf() {
acc := 0
for i, c := range r.Cols {
if c.Offset != 0 {
acc += int(float64(c.Offset*r.Width) / 12.0)
}
r.Cols[i].assignX(x + acc)
acc += c.Width
}
}
}
// recursively assign y position to r.
func (r *Row) assignY(y int) {
r.SetY(y)
if r.isLeaf() {
return
}
for i := range r.Cols {
acc := 0
if r.Widget != nil {
acc = r.Widget.GetHeight()
}
r.Cols[i].assignY(y + acc)
}
}
// GetHeight implements GridBufferer interface.
func (r Row) GetHeight() int {
return r.Height
}
// SetX implements GridBufferer interface.
func (r *Row) SetX(x int) {
r.X = x
if r.Widget != nil {
r.Widget.SetX(x)
}
}
// SetY implements GridBufferer interface.
func (r *Row) SetY(y int) {
r.Y = y
if r.Widget != nil {
r.Widget.SetY(y)
}
}
// SetWidth implements GridBufferer interface.
func (r *Row) SetWidth(w int) {
r.Width = w
if r.Widget != nil {
r.Widget.SetWidth(w)
}
}
// Buffer implements Bufferer interface,
// recursively merge all widgets buffer
func (r *Row) Buffer() Buffer {
merged := NewBuffer()
if r.isRenderableLeaf() {
return r.Widget.Buffer()
}
// for those are not leaves but have a renderable widget
if r.Widget != nil {
merged.Merge(r.Widget.Buffer())
}
// collect buffer from children
if !r.isLeaf() {
for _, c := range r.Cols {
merged.Merge(c.Buffer())
}
}
return merged
}
// Grid implements 12 columns system.
// A simple example:
/*
import ui "github.com/gizak/termui"
// init and create widgets...
// build
ui.Body.AddRows(
ui.NewRow(
ui.NewCol(6, 0, widget0),
ui.NewCol(6, 0, widget1)),
ui.NewRow(
ui.NewCol(3, 0, widget2),
ui.NewCol(3, 0, widget30, widget31, widget32),
ui.NewCol(6, 0, widget4)))
// calculate layout
ui.Body.Align()
ui.Render(ui.Body)
*/
type Grid struct {
Rows []*Row
Width int
X int
Y int
BgColor Attribute
}
// NewGrid returns *Grid with given rows.
func NewGrid(rows ...*Row) *Grid {
return &Grid{Rows: rows}
}
// AddRows appends given rows to Grid.
func (g *Grid) AddRows(rs ...*Row) {
g.Rows = append(g.Rows, rs...)
}
// NewRow creates a new row out of given columns.
func NewRow(cols ...*Row) *Row {
rs := &Row{Span: 12, Cols: cols}
return rs
}
// NewCol accepts: widgets are LayoutBufferer or widgets is A NewRow.
// Note that if multiple widgets are provided, they will stack up in the col.
func NewCol(span, offset int, widgets ...GridBufferer) *Row {
r := &Row{Span: span, Offset: offset}
if widgets != nil && len(widgets) == 1 {
wgt := widgets[0]
nw, isRow := wgt.(*Row)
if isRow {
r.Cols = nw.Cols
} else {
r.Widget = wgt
}
return r
}
r.Cols = []*Row{}
ir := r
for _, w := range widgets {
nr := &Row{Span: 12, Widget: w}
ir.Cols = []*Row{nr}
ir = nr
}
return r
}
// Align calculate each rows' layout.
func (g *Grid) Align() {
h := 0
for _, r := range g.Rows {
r.SetWidth(g.Width)
r.SetX(g.X)
r.SetY(g.Y + h)
r.calcLayout()
h += r.GetHeight()
}
}
// Buffer implments Bufferer interface.
func (g Grid) Buffer() Buffer {
buf := NewBuffer()
for _, r := range g.Rows {
buf.Merge(r.Buffer())
}
return buf
}
var Body *Grid