feat(preview): add file preview page with metadata and styling
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Implement a rich file preview interface to allow users to view file
contents directly in the browser.

Changes include:
- Exposing raw file size (`SizeBytes`) in the download handler's file view.
- Adding comprehensive CSS styling for the preview layout and cards.
- Integrating Prism.js for syntax highlighting of code files.
- Updating Content Security Policy (CSP) headers to permit inline styles and frame sources required by the preview components.
- Adding unit tests to ensure preview metadata attributes are correctly rendered on the download page.
This commit is contained in:
2026-06-03 14:28:50 +03:00
parent e17c5e92a7
commit 3a0dd04e61
12 changed files with 1893 additions and 36 deletions

View File

@@ -15,6 +15,374 @@
text-align: center;
}
.preview-view {
width: min(72rem, calc(100% - 2rem));
min-height: auto;
padding-block: clamp(2rem, 7vh, 4.5rem);
display: block;
}
.preview-card {
width: 100%;
margin: 0 auto;
text-align: left;
}
.preview-card .card-content {
padding: clamp(1rem, 2.4vw, 1.5rem);
}
.preview-header {
display: flex;
align-items: flex-start;
justify-content: space-between;
gap: 1rem;
margin-bottom: 1rem;
}
.preview-title-group {
min-width: 0;
}
.preview-header .file-name {
margin: 0;
font-size: clamp(1.35rem, 2.4vw, 2rem);
line-height: 1.12;
}
.preview-header .download-subtitle {
margin: 0.45rem 0 0;
}
.preview-window {
overflow: hidden;
border: 1px solid color-mix(in srgb, var(--border) 78%, var(--primary));
border-radius: var(--radius);
background:
linear-gradient(180deg, color-mix(in srgb, var(--card) 94%, transparent), color-mix(in srgb, var(--background) 92%, transparent));
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}
.preview-window-titlebar {
min-height: 3rem;
display: flex;
align-items: center;
justify-content: space-between;
gap: 1rem;
padding: 0.72rem 0.9rem;
border-bottom: 1px solid var(--border);
background: color-mix(in srgb, var(--muted) 62%, transparent);
}
.preview-window-titlebar > div:first-child {
min-width: 0;
display: flex;
align-items: baseline;
gap: 0.6rem;
}
.preview-window-titlebar strong {
font-size: 0.92rem;
}
.preview-window-titlebar span {
overflow: hidden;
color: var(--muted-foreground);
font-size: 0.78rem;
text-overflow: ellipsis;
white-space: nowrap;
}
.preview-window-tools {
display: inline-flex;
align-items: center;
justify-content: flex-end;
gap: 0.35rem;
}
.preview-fullscreen-button {
appearance: none;
min-height: 2rem;
padding: 0.35rem 0.7rem;
border: 1px solid color-mix(in srgb, var(--border) 82%, var(--primary));
border-radius: calc(var(--radius) - 0.35rem);
background: color-mix(in srgb, var(--muted) 74%, transparent);
color: var(--foreground);
font: inherit;
font-size: 0.78rem;
font-weight: 700;
cursor: pointer;
}
.preview-fullscreen-button:hover {
background: color-mix(in srgb, var(--primary) 18%, var(--muted));
}
.preview-fullscreen-button[hidden] {
display: none !important;
}
.preview-window-actions {
display: inline-flex;
gap: 0.35rem;
}
.preview-window-actions span {
width: 0.72rem;
height: 0.72rem;
border: 1px solid color-mix(in srgb, var(--border) 75%, var(--foreground));
border-radius: 999px;
background: var(--muted);
}
.preview-tabs {
display: flex;
gap: 0.35rem;
padding: 0.55rem 0.7rem;
border-bottom: 1px solid var(--border);
background: color-mix(in srgb, var(--card) 78%, transparent);
}
.preview-tabs[hidden] {
display: none !important;
}
.preview-tab {
appearance: none;
min-height: 2rem;
padding: 0.35rem 0.7rem;
border: 1px solid transparent;
border-radius: calc(var(--radius) - 0.35rem);
background: transparent;
color: var(--muted-foreground);
font: inherit;
font-size: 0.8rem;
font-weight: 700;
cursor: pointer;
}
.preview-tab:hover,
.preview-tab.is-active {
border-color: color-mix(in srgb, var(--border) 82%, var(--primary));
background: color-mix(in srgb, var(--muted) 78%, transparent);
color: var(--foreground);
}
.preview-stage {
overflow: hidden;
min-height: clamp(18rem, 64vh, 38rem);
display: grid;
place-items: center;
background:
linear-gradient(45deg, color-mix(in srgb, var(--muted) 18%, transparent) 25%, transparent 25%),
linear-gradient(-45deg, color-mix(in srgb, var(--muted) 18%, transparent) 25%, transparent 25%),
color-mix(in srgb, var(--background) 88%, #000);
background-position: 0 0, 0.5rem 0.5rem;
background-size: 1rem 1rem;
}
.preview-stage > * {
grid-area: 1 / 1;
}
.preview-stage > img,
.preview-stage > video {
max-height: clamp(18rem, 64vh, 38rem);
width: 100%;
object-fit: contain;
}
.preview-stage > audio {
width: min(42rem, calc(100% - 2rem));
}
.default-preview,
.large-preview-gate {
width: min(26rem, calc(100% - 2rem));
display: grid;
place-items: center;
gap: 0.9rem;
padding: 2rem;
color: var(--muted-foreground);
text-align: center;
}
.default-preview img {
width: 5.5rem;
height: 5.5rem;
object-fit: contain;
}
.default-preview div {
min-width: 0;
display: grid;
gap: 0.25rem;
}
.default-preview strong {
max-width: 100%;
overflow: hidden;
color: var(--foreground);
font-size: 1rem;
text-overflow: ellipsis;
white-space: nowrap;
}
.default-preview span {
font-size: 0.86rem;
}
.large-preview-gate {
border: 1px solid color-mix(in srgb, var(--border) 82%, var(--danger));
border-radius: var(--radius);
background: color-mix(in srgb, var(--card) 92%, #000);
}
.large-preview-gate strong {
color: var(--foreground);
font-size: 1rem;
}
.large-preview-gate p {
margin: 0;
line-height: 1.45;
}
.large-preview-gate div {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 0.5rem;
}
.native-preview {
width: 100%;
height: clamp(18rem, 64vh, 38rem);
}
.native-audio-preview {
align-self: center;
width: min(42rem, calc(100% - 2rem));
height: auto;
}
.preview-placeholder {
display: grid;
place-items: center;
gap: 0.8rem;
padding: 2rem;
color: var(--muted-foreground);
text-align: center;
}
.preview-placeholder[hidden],
.default-preview[hidden],
.native-preview[hidden],
.large-preview-gate[hidden],
.code-preview[hidden],
.render-preview[hidden] {
display: none !important;
}
.preview-placeholder img {
width: 5rem;
height: 5rem;
object-fit: contain;
opacity: 0.78;
}
.preview-placeholder p {
margin: 0;
font-size: 0.9rem;
}
.code-preview {
min-width: 0;
width: 100%;
height: clamp(18rem, 64vh, 38rem);
overflow: auto;
background: #1b1724;
}
.code-preview pre[class*="language-"] {
width: max-content;
min-width: 100%;
min-height: 100%;
margin: 0;
border: 0;
border-radius: 0;
box-shadow: none;
background: transparent;
font-size: 0.88rem;
line-height: 1.55;
overflow: visible;
text-shadow: none;
}
.code-preview pre {
width: max-content;
min-width: 100%;
min-height: 100%;
margin: 0;
padding: 1rem;
overflow: visible;
color: #f5f3ff;
font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
font-size: 0.88rem;
line-height: 1.55;
white-space: pre;
}
.code-preview pre[class*="language-"] > code {
white-space: pre;
}
.code-preview code[class*="language-"] {
text-shadow: none;
}
.code-preview .token.punctuation {
opacity: 0.9;
}
.render-preview {
width: 100%;
height: clamp(18rem, 64vh, 38rem);
border: 0;
background: var(--background);
}
.preview-window:fullscreen,
.preview-window.is-render-fullscreen {
width: 100dvw;
height: 100dvh;
max-width: none;
display: grid;
grid-template-rows: auto auto minmax(0, 1fr);
border: 0;
border-radius: 0;
background: var(--background);
}
.preview-window.is-render-fullscreen {
position: fixed;
inset: 0;
z-index: 1000;
}
.preview-window:fullscreen .preview-stage,
.preview-window.is-render-fullscreen .preview-stage {
min-height: 0;
height: 100%;
place-items: stretch;
}
.preview-window:fullscreen .render-preview,
.preview-window.is-render-fullscreen .render-preview {
width: 100%;
height: 100%;
}
.file-emblem {
width: 4rem;
height: 4rem;
@@ -801,23 +1169,36 @@ html.reaction-picker-open body {
text-align: right;
}
.preview-stage {
overflow: hidden;
margin-bottom: 1rem;
border: 1px solid var(--border);
border-radius: var(--radius);
background: var(--background);
}
@media (max-width: 720px) {
.preview-view {
width: min(100%, calc(100% - 1rem));
padding-block: 1rem;
}
.preview-stage img,
.preview-stage video {
width: 100%;
max-height: 55vh;
display: block;
object-fit: contain;
}
.preview-header {
flex-direction: column;
align-items: stretch;
}
.preview-stage audio {
width: calc(100% - 2rem);
margin: 1rem;
.preview-header .button {
justify-content: center;
}
.preview-window-titlebar > div:first-child {
display: grid;
gap: 0.2rem;
}
.preview-stage,
.code-preview,
.render-preview,
.native-preview {
min-height: 18rem;
height: min(60vh, 32rem);
}
.preview-stage > img,
.preview-stage > video {
max-height: min(60vh, 32rem);
}
}

View File

@@ -0,0 +1,299 @@
:root {
color-scheme: dark;
--md-bg: #0b0b16;
--md-fg: #f5f3ff;
--md-muted: #aaa4d6;
--md-panel: #17142d;
--md-panel-2: #211b3e;
--md-border: rgba(168, 150, 255, 0.24);
--md-link: #67e8f9;
--md-accent: #a78bfa;
--md-code-bg: #1b1724;
--md-block-code-bg: #0f111a;
--md-block-code-fg: #f8fafc;
--md-block-code-border: rgba(248, 250, 252, 0.16);
--md-shadow: rgba(0, 0, 0, 0.28);
--md-font: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
--md-mono: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
}
:root[data-theme="classic"] {
--md-bg: #09090b;
--md-fg: #fafafa;
--md-muted: #a1a1aa;
--md-panel: #18181b;
--md-panel-2: #27272a;
--md-border: rgba(255, 255, 255, 0.13);
--md-link: #e4e4e7;
--md-accent: #d4d4d8;
--md-code-bg: #111113;
--md-block-code-bg: #09090b;
--md-block-code-fg: #fafafa;
--md-block-code-border: rgba(250, 250, 250, 0.15);
--md-shadow: rgba(0, 0, 0, 0.3);
}
:root[data-theme="retro"] {
color-scheme: light;
--md-bg: #c0c0c0;
--md-fg: #000000;
--md-muted: #404040;
--md-panel: #ffffff;
--md-panel-2: #dfdfdf;
--md-border: #000000;
--md-link: #000078;
--md-accent: #000078;
--md-code-bg: #ffffff;
--md-block-code-bg: #000000;
--md-block-code-fg: #f5f5f5;
--md-block-code-border: #808080;
--md-shadow: transparent;
--md-font: "PixeloidSans", "PixelOperator", "Microsoft Sans Serif", Tahoma, sans-serif;
--md-mono: "PixelOperatorMono", Consolas, monospace;
}
:root[data-theme="gruvbox"] {
--md-bg: #1d2021;
--md-fg: #ebdbb2;
--md-muted: #bdae93;
--md-panel: #282828;
--md-panel-2: #32302f;
--md-border: rgba(235, 219, 178, 0.2);
--md-link: #fabd2f;
--md-accent: #d79921;
--md-code-bg: #1b1d1e;
--md-block-code-bg: #161819;
--md-block-code-fg: #fbf1c7;
--md-block-code-border: rgba(251, 241, 199, 0.18);
--md-shadow: rgba(0, 0, 0, 0.26);
}
:root[data-theme="cyberpunk"] {
--md-bg: #08070d;
--md-fg: #fff36f;
--md-muted: #9bfaff;
--md-panel: #16131f;
--md-panel-2: #251d34;
--md-border: rgba(255, 242, 0, 0.34);
--md-link: #00f0ff;
--md-accent: #ff2a6d;
--md-code-bg: #100d18;
--md-block-code-bg: #07060b;
--md-block-code-fg: #f8fafc;
--md-block-code-border: rgba(0, 240, 255, 0.26);
--md-shadow: rgba(255, 42, 109, 0.14);
}
@font-face {
font-family: "PixeloidSans";
src: url("/static/fonts/pixeloid_sans/PixeloidSans.ttf") format("truetype");
font-weight: normal;
font-display: swap;
}
@font-face {
font-family: "PixeloidSans";
src: url("/static/fonts/pixeloid_sans/PixeloidSans-Bold.ttf") format("truetype");
font-weight: bold;
font-display: swap;
}
@font-face {
font-family: "PixelOperatorMono";
src: url("/static/fonts/pixel_operator/PixelOperatorMono.ttf") format("truetype");
font-weight: normal;
font-display: swap;
}
* {
box-sizing: border-box;
}
html {
min-height: 100%;
background:
radial-gradient(circle at 18% -10%, color-mix(in srgb, var(--md-accent) 18%, transparent), transparent 24rem),
var(--md-bg);
color: var(--md-fg);
font-family: var(--md-font);
}
html[data-theme="retro"] {
background-color: #000000;
background-image: url("/static/backgrounds/stars1.gif");
background-repeat: repeat;
image-rendering: pixelated;
}
html[data-theme="cyberpunk"] {
background:
linear-gradient(rgba(255, 242, 0, 0.035) 1px, transparent 1px),
linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
var(--md-bg);
background-size: 100% 3px, 3rem 100%, auto;
}
body {
min-height: 100vh;
margin: 0;
padding: clamp(1rem, 4vw, 2.25rem);
font-size: 16px;
line-height: 1.65;
}
main {
max-width: 54rem;
margin: 0 auto;
padding: clamp(1rem, 3vw, 2rem);
border: 1px solid var(--md-border);
border-radius: 10px;
background: color-mix(in srgb, var(--md-panel) 90%, transparent);
box-shadow: 0 20px 60px var(--md-shadow);
}
html[data-theme="retro"] main {
border-radius: 0;
background: var(--md-panel);
box-shadow:
inset -1px -1px 0 #404040,
inset 1px 1px 0 #ffffff,
inset -2px -2px 0 #808080,
inset 2px 2px 0 #dfdfdf;
}
html[data-theme="cyberpunk"] main {
border-radius: 0;
box-shadow: 4px 4px 0 rgba(255, 42, 109, 0.5), 0 0 24px rgba(0, 240, 255, 0.12);
clip-path: polygon(0 0, calc(100% - 0.9rem) 0, 100% 0.9rem, 100% 100%, 0.9rem 100%, 0 calc(100% - 0.9rem));
}
h1,
h2,
h3,
h4,
h5,
h6 {
margin: 1.4em 0 0.55em;
color: var(--md-fg);
line-height: 1.2;
}
h1:first-child,
h2:first-child,
h3:first-child {
margin-top: 0;
}
h1 {
font-size: clamp(1.75rem, 5vw, 2.45rem);
}
h2 {
padding-bottom: 0.35rem;
border-bottom: 1px solid var(--md-border);
font-size: 1.45rem;
}
p,
ul,
ol,
blockquote,
pre,
table {
margin: 0 0 1rem;
}
a {
color: var(--md-link);
text-underline-offset: 0.18em;
}
a:hover {
color: var(--md-accent);
}
img,
video {
max-width: 100%;
height: auto;
border-radius: 8px;
}
html[data-theme="retro"] img,
html[data-theme="retro"] video {
border-radius: 0;
image-rendering: pixelated;
}
hr {
height: 1px;
border: 0;
background: var(--md-border);
}
blockquote {
margin-left: 0;
padding: 0.75rem 1rem;
border-left: 4px solid var(--md-accent);
background: color-mix(in srgb, var(--md-panel-2) 58%, transparent);
color: var(--md-muted);
}
pre {
overflow: auto;
padding: 1rem;
border: 1px solid var(--md-block-code-border) !important;
border-radius: 8px;
background: var(--md-block-code-bg) !important;
color: var(--md-block-code-fg) !important;
}
code {
font-family: var(--md-mono);
}
pre code,
pre > code,
pre code[class*="language-"] {
padding: 0 !important;
border: 0 !important;
background: transparent !important;
color: inherit !important;
}
:not(pre) > code {
padding: 0.12rem 0.28rem;
border: 1px solid var(--md-border);
border-radius: 0.25rem;
background: color-mix(in srgb, var(--md-code-bg) 82%, transparent);
}
html[data-theme="retro"] pre,
html[data-theme="retro"] :not(pre) > code {
border-radius: 0;
}
table {
width: 100%;
border-collapse: collapse;
}
th,
td {
padding: 0.5rem 0.65rem;
border: 1px solid var(--md-border);
}
th {
background: color-mix(in srgb, var(--md-panel-2) 70%, transparent);
color: var(--md-fg);
}
tr:nth-child(even) td {
background: color-mix(in srgb, var(--md-panel-2) 28%, transparent);
}
::selection {
background: var(--md-accent);
color: var(--md-bg);
}