snapshot: a new debug tool
I might have finally hit on the right approach: a hotkey that dumps information. Doesn't swamp me with data, and also doesn't perturb anything. y_of_schema1 returns consistent results as I pan around. I'm just not actually printing the lines at that y. I'm printing it at that y/Viewport.zoom. What might be confusing here is that I started out with a simple mental model: * perform computations in surface coordinates (sx,sy) * render in viewport coordinates (vx,vy) But for text quality reasons I need to perform many computations in "scaled surface" coordinates. Viewport coordinates are both offset and scaled relative to surface coordinates. Scaled surface = just scaled relative to surface, not offset. I don't have a clear mental model here for when to use this. I did already use it in one place with my simple mental model: you have to scale distances like rect.w and rect.h but it's incorrect to offset them. Maybe I'm getting this wrong somehow.
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@ -14,6 +14,8 @@ on.keychord_press = function(chord, key)
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-- reset zoom
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Viewport.zoom = 1.0
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A()
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elseif chord == 'C-z' then
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dump_state()
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elseif Cursor_node and Cursor_node.editor.cursor_x then
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local old_top = {line=Cursor_node.editor.screen_top1.line, pos=Cursor_node.editor.screen_top1.pos}
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edit.keychord_press(Cursor_node.editor, chord, key)
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@ -54,4 +56,4 @@ on.keychord_press = function(chord, key)
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B()
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end
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end
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end
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end
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@ -8,11 +8,10 @@ update_editor_box = function(node)
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node.editor.top = vy(node.y)
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else
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node.editor.screen_top1, node.editor.top = schema1_of_y(node.editor, Viewport.y-node.y)
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print('update', Viewport.y-node.y+node.editor.top - y_of_schema1(node.editor, node.editor.screen_top1))
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end
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node.editor.left = math.floor(vx(node.x))
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node.editor.right = math.ceil(vx(node.x+node.w))
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node.editor.width = node.editor.right - node.editor.left
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edit.update_font_settings(node.editor, scale(20))
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Text.redraw_all(node.editor)
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end
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end
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@ -0,0 +1,10 @@
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dump_state = function()
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print('===')
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print('zoom', Viewport.zoom)
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print('viewport', Viewport.y)
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print('node', Page.data[1].y)
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print('node renders from', Page.data[1].editor.top)
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print('screen top', Page.data[1].editor.screen_top1.line)
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local l = 25
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print('y of line', l, y_of_schema1(Page.data[1].editor, {line=l, pos=1}))
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end
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