From 7228055bca2c0bfc00c2a923ed25124cb366b7d1 Mon Sep 17 00:00:00 2001
From: Alex Xu <alexkurosakimh3@gmail.com>
Date: Sun, 14 Dec 2025 23:44:30 -0800
Subject: [PATCH] reduce file operations in webtoon and file fusion (#1191)

* reduce file operations in webtoon

* reduce file operations of file fusion

* fix file fusion failed to prepare

* close webtoon image before remove

* use temp directory
---
 kindlecomicconverter/comic2ebook.py | 28 ++++++++++++----------------
 kindlecomicconverter/comic2panel.py | 21 +++++++++------------
 2 files changed, 21 insertions(+), 28 deletions(-)

diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 8cb784f..357b67e 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -851,14 +851,16 @@ def mupdf_pdf_process_pages_parallel(filename, output_dir, target_height):
 
 
 
-def getWorkFolder(afile):
+def getWorkFolder(afile, workdir=None):
+    if not workdir:
+        workdir = mkdtemp('', 'KCC-')
+        fullPath = os.path.join(workdir, 'OEBPS', 'Images')
+    else:
+        fullPath = workdir
     if os.path.isdir(afile):
         if disk_usage(gettempdir())[2] < getDirectorySize(afile) * 2.5:
             raise UserWarning("Not enough disk space to perform conversion.")
-        workdir = mkdtemp('', 'KCC-', os.path.dirname(afile))
         try:
-            os.rmdir(workdir)
-            fullPath = os.path.join(workdir, 'OEBPS', 'Images')
             copytree(afile, fullPath)
             sanitizePermissions(fullPath)
             return workdir
@@ -869,8 +871,6 @@ def getWorkFolder(afile):
         if disk_usage(gettempdir())[2] < os.path.getsize(afile) * 2.5:
             raise UserWarning("Not enough disk space to perform conversion.")
         if afile.lower().endswith('.pdf'):
-            workdir = mkdtemp('', 'KCC-', os.path.dirname(afile))
-            fullPath = os.path.join(workdir, 'OEBPS', 'Images')
             if not os.path.exists(fullPath):
                 os.makedirs(fullPath)
             path = workdir
@@ -887,8 +887,6 @@ def getWorkFolder(afile):
                 raise UserWarning(f"Failed to extract images from PDF file. {e}")
             return workdir
         else:
-            workdir = mkdtemp('', 'KCC-', os.path.dirname(afile))
-            fullPath = os.path.join(workdir, 'OEBPS', 'Images')
             if not os.path.exists(fullPath):
                 os.makedirs(fullPath)
             try:
@@ -1532,17 +1530,15 @@ def makeFusion(sources: List[str]):
         print(f"Processing {source}...")
         checkPre(source)
         print("Checking images...")
-        path = getWorkFolder(source)
-        pathfinder = os.path.join(path, "OEBPS", "Images")
-        sanitizeTree(pathfinder)
-        # TODO: remove flattenTree when subchapters are supported
-        flattenTree(pathfinder)
         source_path = Path(source)
         if source_path.is_file():
-            os.renames(pathfinder, fusion_path.joinpath(source_path.stem))
+            targetpath = fusion_path.joinpath(source_path.stem)
         else:
-            os.renames(pathfinder, fusion_path.joinpath(source_path.name))
-        
+            targetpath = fusion_path.joinpath(source_path.name)
+        getWorkFolder(source, str(targetpath))
+        sanitizeTree(targetpath)
+        # TODO: remove flattenTree when subchapters are supported
+        flattenTree(targetpath)   
 
     end = perf_counter()
     print(f"makefusion: {end - start} seconds")
diff --git a/kindlecomicconverter/comic2panel.py b/kindlecomicconverter/comic2panel.py
index ccdbb06..f45cc49 100644
--- a/kindlecomicconverter/comic2panel.py
+++ b/kindlecomicconverter/comic2panel.py
@@ -67,13 +67,14 @@ def mergeDirectory(work):
             result = Image.new('RGB', (targetWidth, targetHeight))
             y = 0
             for i in imagesValid:
-                img = Image.open(i).convert('RGB')
-                if img.size[0] < targetWidth or img.size[0] > targetWidth:
-                    widthPercent = (targetWidth / float(img.size[0]))
-                    heightSize = int((float(img.size[1]) * float(widthPercent)))
-                    img = ImageOps.fit(img, (targetWidth, heightSize), method=Image.BICUBIC, centering=(0.5, 0.5))
-                result.paste(img, (0, y))
-                y += img.size[1]
+                with Image.open(i) as img:
+                    img = img.convert('RGB')
+                    if img.size[0] < targetWidth or img.size[0] > targetWidth:
+                        widthPercent = (targetWidth / float(img.size[0]))
+                        heightSize = int((float(img.size[1]) * float(widthPercent)))
+                        img = ImageOps.fit(img, (targetWidth, heightSize), method=Image.BICUBIC, centering=(0.5, 0.5))
+                    result.paste(img, (0, y))
+                    y += img.size[1]
                 os.remove(i)
             savePath = os.path.split(imagesValid[0])
             result.save(os.path.join(savePath[0], os.path.splitext(savePath[1])[0] + '.png'), 'PNG')
@@ -253,10 +254,8 @@ def main(argv=None, job_progress='', qtgui=None):
         return 1
     if args.height > 0:
         for sourceDir in args.input:
-            targetDir = sourceDir + "-Splitted"
+            targetDir = sourceDir
             if os.path.isdir(sourceDir):
-                rmtree(targetDir, True)
-                os.renames(sourceDir, targetDir)
                 work = []
                 pagenumber = 1
                 splitWorkerOutput = []
@@ -313,8 +312,6 @@ def main(argv=None, job_progress='', qtgui=None):
                         rmtree(targetDir, True)
                         raise RuntimeError("One of workers crashed. Cause: " + splitWorkerOutput[0][0],
                                            splitWorkerOutput[0][1])
-                    if args.inPlace:
-                        os.renames(targetDir, sourceDir)
                 else:
                     rmtree(targetDir, True)
                     raise UserWarning("C2P: Source directory is empty.")