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81 lines
3.4 KiB
Python
81 lines
3.4 KiB
Python
#!/usr/bin/env python3
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"""
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Basic slide transitions — cut, fade, dissolve, flash, and the 'none' clear.
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These five tokens form the everyday transition vocabulary: cut = instant,
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fade = pixel cross-fade, dissolve = pixel-noise dissolve, flash = white
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flash-through, none = remove an existing transition.
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Each demo slide carries the transition that triggers AS THE SLIDE ENTERS
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(replacing the previous one). To experience them, open the .pptx and step
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through Slide Show mode — most differences only show in playback.
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SDK twin of transitions-basic.sh (officecli CLI). Both produce an equivalent
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transitions-basic.pptx. This one drives the **officecli Python SDK**
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(`pip install officecli-sdk`): one resident is started and every slide, shape,
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and transition is shipped over the named pipe in a single `doc.batch(...)`
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round-trip. Each item is the same `{"command","parent"/"path","type","props"}`
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dict you'd put in an `officecli batch` list.
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Usage:
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pip install officecli-sdk # plus the `officecli` binary on PATH
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python3 transitions-basic.py
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"""
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import os
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import sys
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# --- locate the SDK: prefer an installed `officecli-sdk`, else the in-repo copy
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try:
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import officecli # pip install officecli-sdk
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except ImportError:
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sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)),
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"..", "..", "..", "sdk", "python"))
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import officecli
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FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "transitions-basic.pptx")
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def demo_slide(n, trans, title, bg):
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"""Batch items for one demo slide: a full-bleed background shape, a centred
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title shape, and (when non-empty) the slide-level transition. Mirrors the
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add_demo_slide() shell function command-for-command."""
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items = [
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{"command": "add", "parent": "/", "type": "slide", "props": {}},
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{"command": "add", "parent": f"/slide[{n}]", "type": "shape",
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"props": {"x": "0", "y": "0", "width": "33.87cm", "height": "19.05cm",
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"fill": bg}},
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{"command": "add", "parent": f"/slide[{n}]", "type": "shape",
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"props": {"text": title, "size": "54", "bold": "true", "color": "FFFFFF",
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"align": "center",
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"x": "2cm", "y": "7cm", "width": "29.87cm", "height": "4cm"}},
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]
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if trans:
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items.append({"command": "set", "path": f"/slide[{n}]",
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"props": {"transition": trans}})
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return items
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print(f"Building {FILE} ...")
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with officecli.create(FILE, "--force") as doc:
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items = []
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items += demo_slide(1, "", "Basic Transitions", "1F3864")
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items += demo_slide(2, "cut", "cut — instant swap", "C00000")
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items += demo_slide(3, "fade", "fade — pixel cross-fade", "2E75B6")
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items += demo_slide(4, "dissolve", "dissolve — speckle blend", "7030A0")
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items += demo_slide(5, "flash", "flash — white flash-thru", "BF8F00")
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# Demonstrate the 'none' clear: slide 6 first gets fade, then we wipe it.
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# Final readback on slide 6 should NOT have a transition key at all.
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items += demo_slide(6, "fade", "none — fade cleared", "404040")
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items.append({"command": "set", "path": "/slide[6]",
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"props": {"transition": "none"}})
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doc.batch(items)
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print(f" shipped {len(items)} commands")
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doc.send({"command": "save"})
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# context exit closes the resident, flushing the presentation to disk.
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print(f"Created: {FILE}")
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