123 lines
4.5 KiB
Python
123 lines
4.5 KiB
Python
#!/usr/bin/env python3
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"""
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Inkscape plugin: delete the selected object(s) and any objects on top of them.
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I.E. delete the selected node(s) and any other nodes that are completely
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within the bounding-boxes of the selected nodes that have a greater z-order
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Simply put, you select a "background" rectangle, then use this plugin to
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delete it and everything that appears on top of it.
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"""
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import collections
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import subprocess
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import os
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import pprint
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import inkex
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Point = collections.namedtuple('Point', ['x', 'y'])
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Box = collections.namedtuple('Box', ['tl', 'tr', 'br', 'bl'])
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# tl=top left, tr=top right, br=bottom right, bl=bottom left
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nodeInfo = collections.namedtuple('nodeInfo',
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['x', 'y', 'width', 'height'])
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def contains(outer, inner):
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""" Return true if the Box inner is completely within the Box outer """
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return inner.tl.x >= outer.tl.x and inner.tl.y >= outer.tl.y and \
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inner.br.x <= outer.br.x and inner.br.y <= outer.br.y
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class DeleteAboveEffect(inkex.EffectExtension):
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""" Delete the selected node and everything above it """
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node_info = None
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def load_node_info(self):
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""" Ask inkscape for information about all object bounding boxes """
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node_info = dict()
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command = ['inkscape', '--query-all', self.options.input_file]
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check_output = subprocess.check_output
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with open(os.devnull, 'w') as null:
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for line in check_output(command, stderr=null).splitlines():
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raw_id, raw_x, raw_y, raw_width, raw_height = line.split(b',')
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node_info[raw_id.decode("UTF-8")] = nodeInfo(float(raw_x),
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float(raw_y),
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float(raw_width),
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float(raw_height))
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self.node_info = node_info
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return
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def remove(self, node):
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""" Remove the specified node from the document tree """
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parent = node.getparent()
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if parent is None:
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return
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parent.remove(node)
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def bbox(self, node):
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""" Return the bounding-box of the given node """
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node_id = node.get('id')
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#inkex.utils.debug("Check if " + str(node_id) + " is in " + str(self.node_info))
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info = self.node_info[node_id]
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x = info.x
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y = info.y
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width = info.width
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height = info.height
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return Box(Point(x, y),
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Point(x + width, y),
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Point(x + width, y + height),
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Point(x, y + height))
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def effect(self):
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"""
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For every selected node, remove it and all items on top of it
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"""
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self.load_node_info()
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nodes_to_remove = list()
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for id, node in self.svg.selected.items():
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selected_node_bbox = self.bbox(node)
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nodes_to_remove.append(node)
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# search the document tree for the selected node
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# when found, every subsequent node will be "above" it.
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# (i.e. svg documents draw from the background up, so a background
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# node will appear first, then nodes that are progressively
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# closer to the viewer will appear subsequently in the svg file)
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found_selected_node = False
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for node in self.document.getiterator():
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if not found_selected_node:
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if node == node:
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found_selected_node = True
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continue
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# Hereafter we are iterating over all nodes above the
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# selected node. We need to delete them if they appear to
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# be "on top of" the selection (i.e. within the bounding box
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# of the selection)
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try:
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node_bbox = self.bbox(node)
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except KeyError:
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continue
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if contains(selected_node_bbox, node_bbox):
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nodes_to_remove.append(node)
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# Now we remove the items we've previously found. Search and remove
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# need to be separate bulk steps because tree search is disrupted by
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# tree modification
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for condemned_node in set(nodes_to_remove):
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self.remove(condemned_node)
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if __name__ == '__main__':
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if False:
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# Some tools for debug use
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PPRINTER = pprint.PrettyPrinter(indent=4)
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FMT = PPRINTER.pformat
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DUMP = lambda obj: inkex.debug(FMT(obj))
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DeleteAboveEffect().run() |