miscs (Interro02) : horizontal cutting resolution

2026-09-14 22:20:46 +02:00
parent 5080274e8f
commit 0a86403ca6
28 changed files with 1447 additions and 59 deletions
@@ -0,0 +1,131 @@
+from __future__ import annotations
+
+import tkinter as tk
+from pathlib import Path
+from tkinter import messagebox, ttk
+
+import pymupdf
+from PIL import Image, ImageTk
+
+from copienator.pdf_cut import cut_position
+
+PAGE_GAP = 28
+SNAP_PIXELS = 12
+
+
+def percentage_at_y(y: float, heights: list[float], scale: float) -> float:
+    """Convert canvas y to document height, snapping across inter-page gaps."""
+    top = 0.0
+    cumulative = 0.0
+    total = sum(heights)
+    for index, height in enumerate(heights):
+        bottom = top + height * scale
+        if index + 1 < len(heights) and bottom - SNAP_PIXELS <= y <= bottom + PAGE_GAP + SNAP_PIXELS:
+            return (cumulative + height) / total * 100
+        if y <= bottom:
+            return max(0.0, min(100.0, (cumulative + (y - top) / scale) / total * 100))
+        cumulative += height
+        top = bottom + PAGE_GAP
+    return 100.0
+
+
+def y_at_percentage(percent: float, heights: list[float], scale: float) -> float:
+    if percent <= 0:
+        return 0.0
+    if percent >= 100:
+        return sum(heights) * scale + (len(heights) - 1) * PAGE_GAP
+    index, offset = cut_position(heights, percent)
+    top = sum(heights[:index]) * scale + index * PAGE_GAP
+    return top - PAGE_GAP / 2 if index and offset == 0 else top + offset * scale
+
+
+def cut_operator(percent: float, keep: int, mode: str) -> str:
+    value = f"{percent:.6f}".rstrip("0").rstrip(".")
+    return f"c{{{value}}}{keep}{mode}"
+
+
+class CutHelper(tk.Toplevel):
+    def __init__(self, parent, path: Path, on_accept, initial=None):
+        # Load the source before creating a window so invalid PDFs leave no dialog.
+        with pymupdf.open(path) as document:
+            if not len(document):
+                raise ValueError("Le PDF est vide.")
+            self.heights = [page.rect.height for page in document]
+            width = min(850, parent.winfo_screenwidth() - 100)
+            self.scale = min(1.5, width / max(page.rect.width for page in document))
+            rendered = []
+            for page in document:
+                pix = page.get_pixmap(matrix=pymupdf.Matrix(self.scale, self.scale), alpha=False,
+                                      colorspace=pymupdf.csRGB)
+                rendered.append(Image.frombytes("RGB", (pix.width, pix.height), pix.samples))
+        super().__init__(parent)
+        self.title(f"Cut — {path.name}")
+        self.geometry(f"{width + 45}x{min(850, parent.winfo_screenheight() - 100)}")
+        self.transient(parent.winfo_toplevel())
+        self.on_accept = on_accept
+        self.percent = initial[0] if initial else 50.0
+        self.keep = tk.IntVar(value=initial[1] if initial else 1)
+        self.mode = tk.StringVar(value=initial[2] if initial else ">")
+        self.caption = tk.StringVar()
+        ttk.Label(self, text="Déplacez la barre rouge. Entrée : afficher la commande ; Échap : annuler.",
+                  wraplength=width).pack(anchor="w", padx=8, pady=5)
+        controls = ttk.Frame(self)
+        controls.pack(fill="x", padx=8)
+        ttk.Label(controls, text="Conserver à la source :").pack(side="left")
+        ttk.Radiobutton(controls, text="1 — début", variable=self.keep, value=1).pack(side="left")
+        ttk.Radiobutton(controls, text="2 — fin", variable=self.keep, value=2).pack(side="left")
+        ttk.Radiobutton(controls, text="Ajouter à la cible", variable=self.mode, value=">").pack(side="left")
+        ttk.Radiobutton(controls, text="Remplacer", variable=self.mode, value="x").pack(side="left")
+        ttk.Label(self, textvariable=self.caption).pack(anchor="w", padx=8, pady=5)
+        viewport = ttk.Frame(self)
+        viewport.pack(fill="both", expand=True)
+        self.canvas = tk.Canvas(viewport, background="#555555", highlightthickness=0)
+        scrollbar = ttk.Scrollbar(viewport, command=self.canvas.yview)
+        self.canvas.configure(yscrollcommand=scrollbar.set)
+        scrollbar.pack(side="right", fill="y")
+        self.canvas.pack(fill="both", expand=True)
+        self.images = [ImageTk.PhotoImage(image, master=self) for image in rendered]
+        top = 0.0
+        self.width = width
+        for index, image in enumerate(self.images):
+            self.canvas.create_image(0, top, anchor="nw", image=image)
+            top += self.heights[index] * self.scale
+            if index + 1 < len(self.images):
+                top += PAGE_GAP
+        self.canvas.configure(scrollregion=(0, 0, width, top))
+        self.bar = self.canvas.create_line(0, 0, width, 0, fill="#ff3030", width=4)
+        self.canvas.bind("<Button-1>", self.move_bar)
+        self.canvas.bind("<B1-Motion>", self.move_bar)
+        self.canvas.bind("<Button-4>", lambda event: self.canvas.yview_scroll(-3, "units"))
+        self.canvas.bind("<Button-5>", lambda event: self.canvas.yview_scroll(3, "units"))
+        self.canvas.bind("<MouseWheel>", lambda event: self.canvas.yview_scroll(-1 if event.delta > 0 else 1, "units"))
+        self.bind("<Return>", self.accept)
+        self.bind("<Escape>", lambda event: self.destroy())
+        self.keep.trace_add("write", lambda *_: self.draw_bar())
+        self.mode.trace_add("write", lambda *_: self.draw_bar())
+        self.draw_bar()
+        self.canvas.yview_moveto(max(0, (y_at_percentage(self.percent, self.heights, self.scale) - 200) / top))
+        self.focus_set()
+        self.grab_set()
+
+    def move_bar(self, event):
+        self.percent = percentage_at_y(self.canvas.canvasy(event.y), self.heights, self.scale)
+        self.draw_bar()
+
+    def draw_bar(self):
+        y = y_at_percentage(self.percent, self.heights, self.scale)
+        self.canvas.coords(self.bar, 0, y, self.width, y)
+        text = cut_operator(self.percent, self.keep.get(), self.mode.get())
+        if 0 < self.percent < 100:
+            index, offset = cut_position(self.heights, self.percent)
+            text += f" — entre les pages {index} et {index + 1}" if offset == 0 else f" — page {index + 1}"
+        self.caption.set(text)
+
+    def accept(self, event=None):
+        operator = cut_operator(self.percent, self.keep.get(), self.mode.get())
+        rounded = float(operator.split("{")[1].split("}")[0])
+        if not 0 < rounded < 100:
+            messagebox.showerror("Coupe invalide", "Chaque partie doit contenir une portion du PDF.", parent=self)
+            return
+        self.destroy()
+        self.on_accept(operator)