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Viewing changes to zoetrope/debug/stack.lua

  • Committer: Josh C
  • Date: 2013-08-25 00:16:36 UTC
  • Revision ID: josh@9ix.org-20130825001636-xoivc9byo1mdx0fu
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zoetrope/debug/stack.lua
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DebugStack = DebugInstrument:extend
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{
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        visible = false,
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        width = 'narrow',
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        onNew = function (self)
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                self.title.text = 'Stack'
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                self.text = self:add(Text:new{ font = self.font, wordWrap = false })
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                self.lineHeight = self.text._fontObj:getHeight()
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                debugger.showStack = function (level) self:showStack(level) end
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                debugger.hideStack = function() self.visible = false end
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        end,
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        -- Method: showStack
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        -- Makes the instrument visible and shows a stack trace.
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        -- To hide this, just set the instrument's visible property to false.
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        --
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        -- Arguments:
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        --              level - stack level to show
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        --
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        -- Returns:
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        --              nothing
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        showStack = function (self, level)
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                self.text.text = ''
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                self.visible = true
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                self.contentHeight = self.spacing * 2
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                local info
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                repeat
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                        info = debug.getinfo(level, 'nlS')
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                        if info then
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                                self.contentHeight = self.contentHeight + self.lineHeight
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                                if info.name and info.name ~= '' then
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                                        self.text.text = self.text.text .. info.name .. '()\n'
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                                elseif not info.name then
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                                        self.text.text = self.text.text .. '(anonymous function)\n'
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                                else
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                                        self.text.text = self.text.text .. '(tail call)\n'
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                                end
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                                if info.currentline ~= -1 then
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                                        self.text.text = self.text.text .. '    ' .. info.short_src ..
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                                                         ':' .. info.currentline .. '\n'
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                                        self.contentHeight = self.contentHeight + self.lineHeight
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                                end
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                        end
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                        level = level + 1
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                until not info
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        end,
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        onResize = function (self, x, y, width, height)
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                self.text.x = x + self.spacing
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                self.text.y = y + self.spacing
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                self.text.width = width - self.spacing * 2
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                self.text.height = height - self.spacing * 2
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        end
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}