feat(zip/cbz): enhance image filtering and processing for SVG files

src/app/file/utils/filter-images.ts

@@ -1,5 +1,5 @@
 export function filterImages(fileList: Array<string>) {
-    const imageExtensions = ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp'];
+    const imageExtensions = ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp', '.tiff', '.svg', '.svgz'];
 
     return fileList.filter(file => {
         const extension = file.substring(file.lastIndexOf('.')).toLowerCase();

src/app/file/utils/process-images-in-batches.ts

@@ -10,8 +10,21 @@ export async function processImagesInBatches(
 
         await Promise.all(
             batch.map(async (filename, index) => {
-                const blob = await zip.files[filename].async('blob');
+                const file = zip.files[filename];
+                if (!file) return;
+
+                const svgExtensions = ['.svg', '.svgz'];
+                let blob: Blob;
+
+                if (svgExtensions.some(ext => filename.toLowerCase().endsWith(ext))) {
+                    const text = await file.async('string');
+                    blob = new Blob([text], { type: 'image/svg+xml' });
+                } else {
+                    blob = await file.async('blob');
+                }
+
                 const url = URL.createObjectURL(blob);
+
                 postMessage({
                     type: 'file',
                     url,

src/app/viewer/viewer/components/hint-page/hint-page.component.html

@@ -1,4 +1,4 @@
-<manga-page [dir]="viewer.viewModeOption().dir" style="margin: auto;">
+<manga-page [dir]="viewer.viewModeOption().dir" style="margin: auto 0;">
     <svg dir="ltr" frame="3" viewBox="0 0 300 200">
         <text x="50%" y="42%" font-size="28" style="font-family:'Troubleside'">
             {{lang.ph().getByKey(viewer.viewModeOption().hintPhraceKey)}}

src/app/viewer/viewer/components/page/page.component.html

@@ -10,8 +10,8 @@
     }
     <figure [class]="{nsfw:nsfw(), show: nsfw() && showNsfw()}">
         @if(src()){
-        <img crossorigin="anonymous" [id]="'page_'+(index()+1)" [src]="src()" [alt]="alt()" [width]="width()"
-            [height]="height()" [loading]="(index()==0 || preload()) ? 'eager' : 'lazy'" (load)="imageLoad($event)">
+        <img crossorigin="anonymous" [id]="'page_'+(index()+1)" [src]="src()" [alt]="alt()" [attr.width]="widthPx()"
+            [attr.height]="heightPx()" [loading]="(index()==0 || preload()) ? 'eager' : 'lazy'" (load)="imageLoad($event)">
         } @else {
         <ng-content />
         }

src/app/viewer/viewer/components/page/page.component.ts

@@ -28,6 +28,9 @@ export class PageComponent {
   width = computed(() => this.naturalWidth() ?? this.inputWidth());
   height = computed(() => this.naturalHeight() ?? this.inputHeight());
 
+  widthPx = computed(() => this.width().toString() + 'px');
+  heightPx = computed(() => this.height().toString() + 'px');
+
   index: InputSignal<number> = input(0);
 
   agree: OutputEmitterRef<void> = output();
@@ -42,12 +45,30 @@ export class PageComponent {
     this.disagree.emit();
   }
 
-  imageLoad(event: Event) {
+  async imageLoad(event: Event) {
     const img = event.target as HTMLImageElement;
     this.imageLoading.set(false)
     this.naturalWidth.set(img.naturalWidth);
     this.naturalHeight.set(img.naturalHeight);
 
+    try {
+      const response = await fetch(img.src);
+      const blob = await response.blob();
+
+      if (blob.type === 'image/svg+xml' || blob.type === 'image/svg+xml-compressed') {
+        const text = await blob.text();
+        const parser = new DOMParser();
+        const svgDoc = parser.parseFromString(text, 'image/svg+xml');
+        const svgElement: SVGSVGElement = svgDoc.documentElement as unknown as SVGSVGElement;
+        console.log(svgElement.viewBox.baseVal.width);
+
+        this.naturalWidth.set(svgElement.viewBox.baseVal.width);
+        this.naturalHeight.set(svgElement.viewBox.baseVal.height);
+      }
+    } catch (e) {
+      console.warn('Failed to get bitmap size, fallback to naturalWidth/naturalHeight', e);
+    }
+
     this.detectLongPage(this.naturalWidth(), this.naturalHeight())
   }