akiyosi.goneovim/editor/popupmenu.go

package editor

import (
	"math"
	"errors"
	"fmt"
	"strconv"
	"strings"

	"github.com/therecipe/qt/core"
	"github.com/therecipe/qt/svg"
	"github.com/therecipe/qt/widgets"

	"github.com/akiyosi/goneovim/util"
)

// PopupMenu is the popupmenu
type PopupMenu struct {
	ws              *Workspace
	widget          *widgets.QWidget
	itemLayout          *widgets.QGridLayout
	items           []*PopupItem
	rawItems        []interface{}
	total           int
	showTotal       int
	selected        int
	hidden          bool
	top             int
	scrollBar       *widgets.QWidget
	scrollBarPos    int
	scrollBarHeight int
	scrollCol       *widgets.QWidget
	detailLabel     *widgets.QLabel
	x               int
	y               int
}

// PopupItem is
type PopupItem struct {
	p *PopupMenu

	completeMode string

	wordLabel   *widgets.QLabel
	word        string
	wordRequest string

	kind           string
	kindIconWidget *widgets.QWidget
	kindIcon   *svg.QSvgWidget

	menuLabel   *widgets.QLabel
	menu        string
	menuRequest string

	infoLabel   *widgets.QLabel
	info        string
	infoRequest string

	selected        bool
	selectedRequest bool

	kindColor *RGBA
	kindBg    *RGBA
	hidden    bool

	detailText string
}

func initPopupmenuNew() *PopupMenu {
	layout := widgets.NewQHBoxLayout()
	layout.SetContentsMargins(0, 0, 0, 0)
	layout.SetSpacing(10)

	widget := widgets.NewQWidget(nil, 0)
	widget.SetLayout(layout)
	widget.SetContentsMargins(1, 1, 1, 1)
	widget.SetMaximumSize2(editor.width, editor.height)

	margin := editor.config.Editor.Linespace/2 + 2

	itemLayout := widgets.NewQGridLayout2()
	itemLayout.SetSpacing(0)
	itemLayout.SetContentsMargins(0, editor.iconSize/5, 0, 0)

	scrollCol := widgets.NewQWidget(nil, 0)
	scrollCol.SetContentsMargins(0, 0, 0, 0)
	scrollCol.SetFixedWidth(5)
	scrollBar := widgets.NewQWidget(scrollCol, 0)
	scrollBar.SetFixedWidth(5)

	detailLabel := widgets.NewQLabel(nil, 0)
	detailLabel.SetContentsMargins(margin, margin, margin, margin)
	detailLabel.SetWordWrap(true)

	layout.AddLayout(itemLayout, 0)
	layout.AddWidget(scrollCol, 0, 0)
	layout.AddWidget(detailLabel, 0, core.Qt__AlignmentFlag(core.Qt__AlignTop | core.Qt__AlignLeft))

	max := editor.config.Popupmenu.Total

	popup := &PopupMenu{
		widget:      widget,
		itemLayout:      itemLayout,
		detailLabel: detailLabel,
		total:       max,
		scrollBar:   scrollBar,
		scrollCol:   scrollCol,
	}

	var popupItems []*PopupItem
	for i := 0; i < max; i++ {
		kindIconWidget := widgets.NewQWidget(nil, 0)
		kindlayout := widgets.NewQHBoxLayout()
		kindlayout.SetContentsMargins(editor.iconSize/2, 0, editor.iconSize/2, 0)
		kindIconWidget.SetLayout(kindlayout)
		kindIcon := svg.NewQSvgWidget(nil)
		kindIcon.SetFixedSize2(editor.iconSize, editor.iconSize)
		kindlayout.AddWidget(kindIcon, 0, 0)

		word := widgets.NewQLabel(widget, 0)
		word.SetContentsMargins(1, margin, margin, margin)

		menu := widgets.NewQLabel(widget, 0)
		menu.SetContentsMargins(margin, margin, margin, margin)
		menu.SetObjectName("menulabelpopup")

		info := widgets.NewQLabel(widget, 0)
		info.SetContentsMargins(margin, margin, margin, margin)

		itemLayout.AddWidget2(kindIconWidget, i, 0, core.Qt__AlignmentFlag(core.Qt__AlignLeft))
		itemLayout.AddWidget2(word, i, 1, core.Qt__AlignmentFlag(core.Qt__AlignLeft))
		itemLayout.AddWidget2(menu, i, 2, core.Qt__AlignmentFlag(core.Qt__AlignLeft))
		itemLayout.AddWidget2(info, i, 3, core.Qt__AlignmentFlag(core.Qt__AlignLeft))

		popupItem := &PopupItem{
			p:          popup,
			kindIconWidget: kindIconWidget,
			kindIcon:   kindIcon,
			wordLabel:  word,
			menuLabel:  menu,
			infoLabel:  info,
		}
		popupItems = append(popupItems, popupItem)
	}
	popup.items = popupItems

	popup.widget.SetGraphicsEffect(util.DropShadow(-2, 6, 40, 200))

	return popup
}

func (p *PopupMenu) updateFont(font *Font) {
	p.detailLabel.SetFont(font.fontNew)
	for i := 0; i < p.total; i++ {
		popupItem := p.items[i]
		popupItem.wordLabel.SetFont(font.fontNew)
		popupItem.menuLabel.SetFont(font.fontNew)
		popupItem.infoLabel.SetFont(font.fontNew)
	}
}

func (p *PopupMenu) setColor() {
	fg := editor.colors.widgetFg.String()
	inactiveFg := editor.colors.inactiveFg.String()
	bg := editor.colors.widgetBg
	transparent := transparent()
	p.scrollBar.SetStyleSheet(fmt.Sprintf("background-color: %s;", inactiveFg))
	p.widget.SetStyleSheet(fmt.Sprintf("* {background-color: rgba(%d, %d, %d, %f); color: %s;} #menulabelpopup { color: %s; }", bg.R, bg.G, bg.B, transparent, fg, inactiveFg))
}

func (p *PopupMenu) setPumblend(arg interface{}) {
	var pumblend int
	var err error
	switch val := arg.(type) {
	case string:
		pumblend, err = strconv.Atoi(val)
		if err != nil {
			return
		}
	case int32: // can't combine these in a type switch without compile error
		pumblend = int(val)
	case int64:
		pumblend = int(val)
	default:
		return
	}
	alpha := float64(100-pumblend) / float64(100)
	if alpha < 0 {
		alpha = 0
	}

	fg := editor.colors.widgetFg.String()
	inactiveFg := editor.colors.inactiveFg.String()
	bg := editor.colors.widgetBg
	p.scrollBar.SetStyleSheet(fmt.Sprintf("background-color: %s;", inactiveFg))
	p.widget.SetStyleSheet(fmt.Sprintf("* {background-color: rgba(%d, %d, %d, %f); color: %s;} #menulabelpopup { color: %s; }", bg.R, bg.G, bg.B, alpha, fg, inactiveFg))
}

func (p *PopupMenu) showItems(args []interface{}) {
	arg := args[0].([]interface{})
	items := arg[0].([]interface{})
	selected := util.ReflectToInt(arg[1])
	row := util.ReflectToInt(arg[2])
	col := util.ReflectToInt(arg[3])
	gridid := util.ReflectToInt(arg[4])

	p.rawItems = items
	p.selected = selected
	p.top = 0

	p.detailLabel.SetText("")

	popupItems := p.items
	itemHeight := p.ws.font.lineHeight

	// Calc the maximum completion items 
	//   where,
	//     `row` is the anchor position, where the first character of the completed word will be
	//     `p.ws.screen.height` is the entire screen height
	heightLeft := p.ws.screen.height - (row+1)*p.ws.font.lineHeight
	total := heightLeft / itemHeight
	if total < p.total {
		p.showTotal = total
	} else {
		p.showTotal = p.total
	}

	for i := 0; i < p.total; i++ {
		popupItem := popupItems[i]
		if i >= len(items) || i >= total {
			popupItem.hide()
			continue
		}

		item := items[i].([]interface{})
		popupItem.setItem(item, selected == i)
		popupItem.show()
	}

	if len(items) > p.showTotal {
		p.scrollBarHeight = int(float64(p.showTotal) / float64(len(items)) * float64(itemHeight*p.showTotal))
		p.scrollBarPos = 0
		p.scrollBar.SetFixedHeight(p.scrollBarHeight)
		p.scrollBar.Move2(0, p.scrollBarPos)
		p.scrollCol.Show()
	} else {
		p.scrollCol.Hide()
	}

	popupWidth := editor.iconSize + popupItems[0].wordLabel.Width()

	x := int(float64(col) * p.ws.font.truewidth)
	y := row*p.ws.font.lineHeight + p.ws.font.lineHeight
	if p.ws.drawTabline {
		y += p.ws.tabline.widget.Height()
	}

	if x+popupWidth >= p.ws.screen.widget.Width() {
		x = p.ws.screen.widget.Width() - popupWidth - 5
	}
	win := p.ws.screen.windows[gridid]
	if win != nil {
		x += int(float64(win.pos[0]) * p.ws.font.truewidth)
		y += win.pos[1] * p.ws.font.lineHeight
	}

	p.widget.Move2(x, y)
	p.hide()
	p.show()
}

func (p *PopupMenu) show() {
	p.widget.Raise()
	p.widget.Show()
}

func (p *PopupMenu) hide() {
	p.widget.Hide()
}

func (p *PopupMenu) selectItem(args []interface{}) {
	selected := util.ReflectToInt(args[0].([]interface{})[0])
	if selected == -1 && p.top > 0 {
		p.scroll(-p.top)
	}

	if selected-p.top >= p.showTotal {
		p.scroll(selected - p.top - p.showTotal + 1)
	}

	if selected >= 0 && selected-p.top < 0 {
		p.scroll(-1)
	}

	for i := 0; i < p.showTotal; i++ {
		popupItem := p.items[i]
		isSelected := selected == i+p.top
		popupItem.setSelected(isSelected)
		if isSelected {
			if editor.config.Popupmenu.ShowDetail {
				popupItem.p.detailLabel.SetText(popupItem.detailText)
				popupItem.p.detailLabel.Show()
			} else {
				popupItem.p.detailLabel.Hide()
			}
		}
	}
}

func (p *PopupMenu) scroll(n int) {
	p.top += n
	items := p.rawItems
	popupItems := p.items
	for i := 0; i < p.showTotal; i++ {
		popupItem := popupItems[i]
		item := items[i+p.top].([]interface{})
		popupItem.setItem(item, false)
	}
	p.scrollBarPos = int((float64(p.top) / float64(len(items))) * float64(p.widget.Height()))
	p.scrollBar.Move2(0, p.scrollBarPos)
	p.hide()
	p.show()
}

func (p *PopupItem) updateContent() {
	if p.selected != p.selectedRequest {
		p.selected = p.selectedRequest
		if p.selected {
			p.kindIconWidget.SetStyleSheet(fmt.Sprintf("background-color: %s;", editor.colors.selectedBg.StringTransparent()))
			p.wordLabel.SetStyleSheet(fmt.Sprintf("background-color: %s;", editor.colors.selectedBg.StringTransparent()))
			p.menuLabel.SetStyleSheet(fmt.Sprintf("background-color: %s;", editor.colors.selectedBg.StringTransparent()))
			p.infoLabel.SetStyleSheet(fmt.Sprintf("background-color: %s;", editor.colors.selectedBg.StringTransparent()))
		} else {
			p.kindIconWidget.SetStyleSheet("background-color: rgba(0, 0, 0, 0);")
			p.wordLabel.SetStyleSheet("background-color: rgba(0, 0, 0, 0);")
			p.menuLabel.SetStyleSheet("background-color: rgba(0, 0, 0, 0);")
			p.infoLabel.SetStyleSheet("background-color: rgba(0, 0, 0, 0);")
		}
	}
	if p.wordRequest != p.word {
		p.word = p.wordRequest
		p.menu = p.menuRequest
		p.info = p.infoRequest
		p.wordLabel.SetText(p.word)

		menuLines := strings.Split(p.menuRequest, "\n")
		infoLines := strings.Split(p.infoRequest, "\n")
		p.menuLabel.SetText(menuLines[0])
		p.infoLabel.SetText(infoLines[0])

		menuLabelTextLen := math.Ceil(p.p.ws.font.fontMetrics.HorizontalAdvance(menuLines[0], -1))

		if len(menuLines) > 1 || len(infoLines) > 1 || menuLabelTextLen > float64(editor.config.Popupmenu.MenuWidth) {
			p.detailText = p.menuRequest + "\n" + p.infoRequest
		} else {
			p.detailText = ""
		}
	}
	// p.wordLabel.AdjustSize()
	// p.menuLabel.AdjustSize()
	// p.infoLabel.AdjustSize()
	p.menuLabel.SetFixedWidth(editor.config.Popupmenu.MenuWidth)
	p.infoLabel.SetFixedWidth(editor.config.Popupmenu.InfoWidth)

	detailWidth := 0
	if editor.config.Popupmenu.ShowDetail {
		 detailWidth = editor.config.Popupmenu.DetailWidth
	}
	p.p.widget.SetFixedWidth(
		editor.iconSize + p.wordLabel.Width() + p.menuLabel.Width() + p.infoLabel.Width() + detailWidth,
	)
}

func (p *PopupItem) setSelected(selected bool) {
	p.selectedRequest = selected
	p.updateContent()
}

func (p *PopupItem) setItem(item []interface{}, selected bool) {
	word := item[0].(string)
	kind := item[1].(string)
	menu := item[2].(string)
	info := item[3].(string)

	p.wordRequest = word
	p.menuRequest = menu
	p.infoRequest = info
	p.setKind(kind, selected)
	p.setSelected(selected)
}

func detectVimCompleteMode() (string, error) {
	w := editor.workspaces[editor.active]

	var isEnableCompleteMode int
	var enableCompleteMode interface{}
	var kind interface{}
	w.nvim.Eval("exists('*complete_mode')", &enableCompleteMode)
	switch enableCompleteMode.(type) {
	case int64:
		isEnableCompleteMode = int(enableCompleteMode.(int64))
	case uint64:
		isEnableCompleteMode = int(enableCompleteMode.(uint64))
	case uint:
		isEnableCompleteMode = int(enableCompleteMode.(uint))
	case int:
		isEnableCompleteMode = enableCompleteMode.(int)
	}
	if isEnableCompleteMode == 1 {
		w.nvim.Eval("complete_mode()", &kind)
		if kind != nil {
			return kind.(string), nil
		} else {
			return "", nil
		}
	}
	return "", errors.New("Does not exits complete_mode()")

}

func (p *PopupItem) setKind(kind string, selected bool) {
	lowerKindText := strings.ToLower(kind)
	hiAttrDef := editor.workspaces[editor.active].screen.highAttrDef
	var colorOfFunc, colorOfStatement, colorOfType, colorOfKeyword *RGBA
	for _, hi := range hiAttrDef {
		switch hi.hlName {
		case "Function":
			colorOfFunc = hi.fg()
		case "Statement":
			colorOfStatement = hi.fg()
		case "Type":
			colorOfType = hi.fg()
		case "String":
			colorOfKeyword = hi.fg()
		default:
			continue
		}
	}
	switch lowerKindText {
	case "function", "func":
		icon := editor.getSvg("lsp_function", colorOfFunc)
		p.kindIcon.Load2(core.NewQByteArray2(icon, len(icon)))
	case "var", "statement", "instance", "param", "import":
		icon := editor.getSvg("lsp_variable", colorOfStatement)
		p.kindIcon.Load2(core.NewQByteArray2(icon, len(icon)))
	case "class", "type", "struct":
		icon := editor.getSvg("lsp_class", colorOfType)
		p.kindIcon.Load2(core.NewQByteArray2(icon, len(icon)))
	case "const", "module", "keyword", "package":
		icon := editor.getSvg("lsp_"+lowerKindText, colorOfKeyword)
		p.kindIcon.Load2(core.NewQByteArray2(icon, len(icon)))
	default:
		completeMode, err := detectVimCompleteMode()
		if err == nil {
			p.completeMode = completeMode
		}
		switch p.completeMode {
		case "keyword",
			"whole_line",
			"files",
			"tags",
			"path_defines",
			"path_patterns",
			"path_dictionary",
			"path_thesaurus",
			"path_cmdline",
			"path_function",
			"path_omni",
			"path_spell",
			"path_eval":
			icon := editor.getSvg("vim_"+p.completeMode, nil)
			p.kindIcon.Load2(core.NewQByteArray2(icon, len(icon)))
		default:
			icon := editor.getSvg("vim_unknown", nil)
			p.kindIcon.Load2(core.NewQByteArray2(icon, len(icon)))
		}
	}
}

func (p *PopupItem) hide() {
	if p.hidden {
		return
	}
	p.hidden = true
	p.kindIcon.Hide()
	p.wordLabel.Hide()
	p.menuLabel.Hide()
	p.infoLabel.Hide()
}

func (p *PopupItem) show() {
	if !p.hidden {
		return
	}
	p.hidden = false
	p.kindIcon.Show()
	p.wordLabel.Show()
	p.menuLabel.Show()
	p.infoLabel.Show()
}