From 0a5484158501b4260fa6995686391a22b3c5fad0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=9B=AE=E6=A3=83?= <BT-Muli@outlook.com>
Date: Thu, 29 Feb 2024 15:16:05 +0800
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20=E5=9B=BE=E7=89=87=E6=B5=AE?=
 =?UTF-8?q?=E7=AA=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/components/post/tp-image.vue  |  12 ++-
 src/components/post/tpo-image.vue | 156 ++++++++++++++++++++++++++++++
 src/utils/TGShare.ts              |  33 +++++--
 3 files changed, 191 insertions(+), 10 deletions(-)
 create mode 100644 src/components/post/tpo-image.vue

diff --git a/src/components/post/tp-image.vue b/src/components/post/tp-image.vue
index 8e55c468..340f3cfc 100644
--- a/src/components/post/tp-image.vue
+++ b/src/components/post/tp-image.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="tp-image-box">
+  <div class="tp-image-box" @click="showOverlay = true">
     <img
       :style="getImageStyle()"
       :src="getImageUrl()"
@@ -7,13 +7,15 @@
       :title="getImageTitle()"
     />
   </div>
+  <TpoImage :image="props.data" v-model="showOverlay" />
 </template>
 <script lang="ts" setup>
-import { StyleValue, toRaw } from "vue";
+import { StyleValue, ref } from "vue";
 
+import TpoImage from "./tpo-image.vue";
 import { bytesToSize } from "../../utils/toolFunc";
 
-interface TpImage {
+export interface TpImage {
   insert: {
     image: string;
   };
@@ -31,11 +33,13 @@ interface TpImageProps {
 }
 
 const props = defineProps<TpImageProps>();
+const showOverlay = ref(false);
 
-console.log("tp-image", props.data.insert.image, toRaw(props.data).attributes);
+console.log("tp-image", props.data.insert.image, props.data.attributes);
 
 function getImageStyle(): StyleValue {
   let style: StyleValue = <Array<StyleValue>>[];
+  style.push("cursor: pointer");
   if (props.data.attributes == undefined) return style;
   if (props.data.attributes.width < 800) {
     const widthFullRule: StyleValue = "width: 100%";
diff --git a/src/components/post/tpo-image.vue b/src/components/post/tpo-image.vue
new file mode 100644
index 00000000..b097bf84
--- /dev/null
+++ b/src/components/post/tpo-image.vue
@@ -0,0 +1,156 @@
+<template>
+  <TOverlay v-model="visible" hide :to-click="onCancel" blur-val="10px">
+    <div class="tpoi-box">
+      <img :src="props.image.insert.image" alt="图片" />
+      <div class="tpoi-bottom">
+        <div class="tpoi-info" v-if="props.image.attributes">
+          <p v-if="props.image.attributes.size">
+            大小：{{ bytesToSize(props.image.attributes.size ?? 0) }}
+          </p>
+          <p>尺寸：{{ props.image.attributes.width }}x{{ props.image.attributes.height }}</p>
+          <p>格式：{{ format }}</p>
+        </div>
+        <div class="tpoi-tools">
+          <v-icon @click="setBlackBg" title="切换背景色">mdi-format-color-fill</v-icon>
+          <v-icon @click="onCopy" title="复制到剪贴板">mdi-content-copy</v-icon>
+          <v-icon @click="onDownload" title="下载到本地">mdi-download</v-icon>
+          <v-icon @click="onCancel" title="关闭浮窗">mdi-close</v-icon>
+        </div>
+      </div>
+    </div>
+  </TOverlay>
+</template>
+<script setup lang="ts">
+import { computed, onUnmounted, ref } from "vue";
+
+import { TpImage } from "./tp-image.vue";
+import { copyToClipboard, getImageBuffer, saveCanvasImg } from "../../utils/TGShare";
+import { bytesToSize } from "../../utils/toolFunc";
+import showSnackbar from "../func/snackbar";
+import TOverlay from "../main/t-overlay.vue";
+
+interface TpoImageProps {
+  image: TpImage;
+  modelValue: boolean;
+}
+
+type TpoImageEmits = {
+  (e: "update:modelValue", v: boolean): void;
+};
+
+const props = defineProps<TpoImageProps>();
+const emits = defineEmits<TpoImageEmits>();
+const buffer = ref<Uint8Array | null>(null);
+const bgMode = ref(0); // 0: transparent, 1: black, 2: white
+
+const visible = computed({
+  get: () => props.modelValue,
+  set: (value) => {
+    emits("update:modelValue", value);
+  },
+});
+const bg = computed(() => {
+  if (bgMode.value === 1) return "black";
+  if (bgMode.value === 2) return "white";
+  return "transparent";
+});
+
+const format = computed(() => {
+  if (props.image.attributes?.ext) return props.image.attributes.ext;
+  const imageFormat = props.image.insert.image.split(".").pop();
+  if (imageFormat !== undefined) return imageFormat;
+  return "png";
+});
+
+function onCancel() {
+  visible.value = false;
+}
+
+function setBlackBg() {
+  bgMode.value = (bgMode.value + 1) % 3;
+  const bgLabelList = ["透明", "黑色", "白色"];
+  showSnackbar({
+    text: `背景已切换为${bgLabelList[bgMode.value]}`,
+  });
+}
+
+async function onCopy(): Promise<void> {
+  if (format.value === "gif") {
+    showSnackbar({
+      text: "GIF 图片不支持复制到剪贴板",
+      color: "error",
+    });
+    return;
+  }
+  const image = props.image.insert.image;
+  if (buffer.value === null) buffer.value = await getImageBuffer(image);
+  const size = bytesToSize(buffer.value.byteLength);
+  await copyToClipboard(buffer.value);
+  showSnackbar({ text: `图片已复制到剪贴板，大小：${size}` });
+}
+
+async function onDownload() {
+  const image = props.image.insert.image;
+  if (buffer.value === null) buffer.value = await getImageBuffer(image);
+  const size = bytesToSize(buffer.value.byteLength);
+  if (buffer.value.byteLength > 80000000) {
+    showSnackbar({
+      text: "图片过大，无法下载到本地",
+      color: "error",
+    });
+    return;
+  }
+  await saveCanvasImg(buffer.value, Date.now().toString(), format.value);
+  showSnackbar({ text: `图片已下载到本地，大小：${size}` });
+}
+
+onUnmounted(() => {
+  buffer.value = null;
+});
+</script>
+<style lang="css" scoped>
+.tpoi-box {
+  position: relative;
+  display: flex;
+  min-width: 400px;
+  max-width: 90vw;
+  flex-direction: column;
+  align-items: center;
+  justify-content: flex-start;
+  row-gap: 20px;
+}
+
+.tpoi-box img {
+  max-width: 90vw;
+  max-height: 70vh;
+  background-color: v-bind(bg);
+  object-fit: contain;
+}
+
+.tpoi-bottom {
+  display: flex;
+  width: 100%;
+  align-items: flex-end;
+  justify-content: space-between;
+}
+
+.tpoi-info {
+  padding: 10px;
+  border-radius: 10px;
+  background-color: var(--common-shadow-2);
+  color: white;
+}
+
+.tpoi-tools {
+  display: flex;
+  padding: 10px;
+  border-radius: 10px;
+  background-color: var(--common-shadow-2);
+  color: white;
+  gap: 10px;
+}
+
+.tpoi-tools v-icon {
+  cursor: pointer;
+}
+</style>
diff --git a/src/utils/TGShare.ts b/src/utils/TGShare.ts
index ab86afb4..457b21a6 100644
--- a/src/utils/TGShare.ts
+++ b/src/utils/TGShare.ts
@@ -1,7 +1,7 @@
 /**
  * @file utils/TGShare.ts
  * @description 生成分享截图并保存到本地
- * @since Beta v0.4.2
+ * @since Beta v0.4.4
  */
 
 import { dialog, fs, http, path } from "@tauri-apps/api";
@@ -14,17 +14,23 @@ import showSnackbar from "../components/func/snackbar";
 
 /**
  * @description 保存图片-canvas
- * @since Beta v0.4.2
+ * @since Beta v0.4.4
  * @param {Uint8Array} buffer - 图片数据
  * @param {string} filename - 文件名
+ * @param {string} format - 文件格式
  * @returns {Promise<void>} 无返回值
  */
-async function saveCanvasImg(buffer: Uint8Array, filename: string): Promise<void> {
+export async function saveCanvasImg(
+  buffer: Uint8Array,
+  filename: string,
+  format?: string,
+): Promise<void> {
+  if (format === undefined) format = "png";
   await dialog
     .save({
       title: "保存图片",
-      filters: [{ name: "图片", extensions: ["png"] }],
-      defaultPath: `${await path.downloadDir()}${path.sep}${filename}.png`,
+      filters: [{ name: "图片", extensions: [format] }],
+      defaultPath: `${await path.downloadDir()}${path.sep}${filename}.${format}`,
     })
     .then(async (res) => {
       if (res === null) return;
@@ -55,6 +61,21 @@ export async function saveImgLocal(url: string): Promise<string> {
     });
 }
 
+/**
+ * @description 返回图片 buffer
+ * @since Beta v0.4.4
+ * @param {string} url - 图片链接
+ * @returns {Promise<Uint8Array>} 图片 buffer
+ */
+export async function getImageBuffer(url: string): Promise<Uint8Array> {
+  return await http
+    .fetch<ArrayBuffer>(url, {
+      method: "GET",
+      responseType: http.ResponseType.Binary,
+    })
+    .then((res) => new Uint8Array(res.data));
+}
+
 /**
  * @description 获取分享截图背景色
  * @since Beta v0.3.2
@@ -151,7 +172,7 @@ export async function generateShareImg(
  * @param {Uint8Array} buffer - 图片数据
  * @returns {Promise<void>} 无返回值
  */
-async function copyToClipboard(buffer: Uint8Array): Promise<void> {
+export async function copyToClipboard(buffer: Uint8Array): Promise<void> {
   const blob = new Blob([buffer], { type: "image/png" });
   const url = URL.createObjectURL(blob);
   await navigator.clipboard.write([