feat: 形状支持复杂渐变填充

src/components/GradientBar.vue

@@ -30,13 +30,14 @@ const emit = defineEmits<{
 
 const points = ref<GradientColor[]>([])
 
-watchEffect(() => {
-  points.value = props.value
-})
-
 const barRef = ref<HTMLElement>()
 const activeIndex = ref(0)
 
+watchEffect(() => {
+  points.value = props.value
+  if (activeIndex.value > props.value.length - 1) activeIndex.value = 0
+})
+
 watch(activeIndex, () => {
   emit('update:index', activeIndex.value)
 })
@@ -52,6 +53,9 @@ const removePoint = (index: number) => {
   if (index === activeIndex.value) {
     activeIndex.value = (index - 1 < 0) ? 0 : index - 1
   }
+  else if (activeIndex.value === props.value.length - 1) {
+    activeIndex.value = props.value.length - 2
+  }
 
   const values = props.value.filter((item, _index) => _index !== index)
   emit('update:value', values)

src/hooks/useExport.ts

@@ -517,7 +517,14 @@ export default () => {
             }
             const points = formatPoints(toPoints(el.path), scale)
   
-            const fillColor = formatColor(el.fill)
+            let fillColor = formatColor(el.fill)
+            if (el.gradient) {
+              const colors = el.gradient.colors
+              const color1 = colors[0].color
+              const color2 = colors[colors.length - 1].color
+              const color = tinycolor.mix(color1, color2).toHexString()
+              fillColor = formatColor(color)
+            }
             const opacity = el.opacity === undefined ? 1 : el.opacity
   
             const options: pptxgen.ShapeProps = {

src/types/slides.ts

@@ -34,6 +34,15 @@ export const enum ElementTypes {
   AUDIO = 'audio',
 }
 
+/**
+ * 渐变
+ * 
+ * type: 渐变类型（径向、线性）
+ * 
+ * colors: 渐变颜色列表（pos: 百分比位置；color: 颜色）
+ * 
+ * rotate: 渐变角度（线性渐变）
+ */
 export type GradientType = 'linear' | 'radial'
 export type GradientColor = {
   pos: number
@@ -261,22 +270,6 @@ export interface PPTImageElement extends PPTBaseElement {
   colorMask?: string
 }
 
-
-/**
- * 形状渐变
- * 
- * type: 渐变类型（径向、线性）
- * 
- * color: 渐变颜色
- * 
- * rotate: 渐变角度（线性渐变）
- */
-export interface ShapeGradient {
-  type: GradientType
-  color: [string, string]
-  rotate: number
-}
-
 export type ShapeTextAlign = 'top' | 'middle' | 'bottom' 
 
 /**
@@ -338,7 +331,7 @@ export interface PPTShapeElement extends PPTBaseElement {
   path: string
   fixedRatio: boolean
   fill: string
-  gradient?: ShapeGradient
+  gradient?: Gradient
   outline?: PPTElementOutline
   opacity?: number
   flipH?: boolean

src/views/Editor/Toolbar/ElementStylePanel/ShapeStylePanel.vue

@@ -52,27 +52,22 @@
     
     <template v-if="fillType === 'gradient'">
       <div class="row">
-        <div style="width: 40%;">起点颜色：</div>
-        <Popover trigger="click" style="width: 60%;">
-          <template #content>
-            <ColorPicker
-              :modelValue="gradient.color[0]"
-              @update:modelValue="value => updateGradient({ color: [value, gradient.color[1]] })"
-            />
-          </template>
-          <ColorButton :color="gradient.color[0]" />
-        </Popover>
+        <GradientBar
+          :value="gradient.colors"
+          @update:value="value => updateGradient({ colors: value })"
+          @update:index="index => currentGradientIndex = index"
+        />
       </div>
       <div class="row">
-        <div style="width: 40%;">终点颜色：</div>
+        <div style="width: 40%;">当前色块：</div>
         <Popover trigger="click" style="width: 60%;">
           <template #content>
             <ColorPicker
-              :modelValue="gradient.color[1]"
-              @update:modelValue="value => updateGradient({ color: [gradient.color[0], value] })"
+              :modelValue="gradient.colors[currentGradientIndex].color"
+              @update:modelValue="value => updateGradientColors(value)"
             />
           </template>
-          <ColorButton :color="gradient.color[1]" />
+          <ColorButton :color="gradient.colors[currentGradientIndex].color" />
         </Popover>
       </div>
       <div class="row" v-if="gradient.type === 'linear'">
@@ -133,7 +128,7 @@
 import { type Ref, ref, watch } from 'vue'
 import { storeToRefs } from 'pinia'
 import { useMainStore, useSlidesStore } from '@/store'
-import type { GradientType, PPTShapeElement, ShapeGradient, ShapeText } from '@/types/slides'
+import type { GradientType, PPTShapeElement, Gradient, ShapeText } from '@/types/slides'
 import { type ShapePoolItem, SHAPE_LIST, SHAPE_PATH_FORMULAS } from '@/configs/shapes'
 import useHistorySnapshot from '@/hooks/useHistorySnapshot'
 import useShapeFormatPainter from '@/hooks/useShapeFormatPainter'
@@ -153,6 +148,7 @@ import RadioButton from '@/components/RadioButton.vue'
 import RadioGroup from '@/components/RadioGroup.vue'
 import Select from '@/components/Select.vue'
 import Popover from '@/components/Popover.vue'
+import GradientBar from '@/components/GradientBar.vue'
 
 const mainStore = useMainStore()
 const slidesStore = useSlidesStore()
@@ -161,19 +157,27 @@ const { handleElement, handleElementId, shapeFormatPainter } = storeToRefs(mainS
 const handleShapeElement = handleElement as Ref<PPTShapeElement>
 
 const fill = ref<string>('#000')
-const gradient = ref<ShapeGradient>({
+const gradient = ref<Gradient>({
   type: 'linear', 
   rotate: 0,
-  color: ['#fff', '#fff'],
+  colors: [
+    { pos: 0, color: '#fff' },
+    { pos: 100, color: '#fff' },
+  ],
 })
 const fillType = ref('fill')
 const textAlign = ref('middle')
+const currentGradientIndex = ref(0)
 
 watch(handleElement, () => {
   if (!handleElement.value || handleElement.value.type !== 'shape') return
 
   fill.value = handleElement.value.fill || '#fff'
-  gradient.value = handleElement.value.gradient || { type: 'linear', rotate: 0, color: [fill.value, '#fff'] }
+  const defaultGradientColor = [
+    { pos: 0, color: fill.value },
+    { pos: 100, color: '#fff' },
+  ]
+  gradient.value = handleElement.value.gradient || { type: 'linear', rotate: 0, colors: defaultGradientColor }
   fillType.value = handleElement.value.gradient ? 'gradient' : 'fill'
   textAlign.value = handleElement.value?.text?.align || 'middle'
 }, { deep: true, immediate: true })
@@ -196,11 +200,18 @@ const updateFillType = (type: 'gradient' | 'fill') => {
 }
 
 // 设置渐变填充
-const updateGradient = (gradientProps: Partial<ShapeGradient>) => {
+const updateGradient = (gradientProps: Partial<Gradient>) => {
   if (!gradient.value) return
-  const _gradient: ShapeGradient = { ...gradient.value, ...gradientProps }
+  const _gradient = { ...gradient.value, ...gradientProps }
   updateElement({ gradient: _gradient })
 }
+const updateGradientColors = (color: string) => {
+  const colors = gradient.value.colors.map((item, index) => {
+    if (index === currentGradientIndex.value) return { ...item, color }
+    return item
+  })
+  updateGradient({ colors })
+}
 
 // 设置填充色
 const updateFill = (value: string) => {

src/views/components/element/ShapeElement/BaseShapeElement.vue

@@ -31,8 +31,7 @@
             <GradientDefs
               :id="`base-gradient-${elementInfo.id}`" 
               :type="elementInfo.gradient.type"
-              :color1="elementInfo.gradient.color[0]"
-              :color2="elementInfo.gradient.color[1]"
+              :colors="elementInfo.gradient.colors"
               :rotate="elementInfo.gradient.rotate"
             />
           </defs>

src/views/components/element/ShapeElement/GradientDefs.vue

@@ -8,24 +8,21 @@
     y2="0%" 
     :gradientTransform="`rotate(${rotate},0.5,0.5)`"
   >
-    <stop offset="0%" :stop-color="color1" />
-    <stop offset="100%" :stop-color="color2" />
+    <stop v-for="(item, index) in colors" :key="index" :offset="`${item.pos}%`" :stop-color="item.color" />
   </linearGradient>
 
   <radialGradient :id="id" v-else>
-    <stop offset="0%" :stop-color="color1" />
-    <stop offset="100%" :stop-color="color2" />
+    <stop v-for="(item, index) in colors" :key="index" :offset="`${item.pos}%`" :stop-color="item.color" />
   </radialGradient>
 </template>
 
 <script lang="ts" setup>
-import type { GradientType } from '@/types/slides'
+import type { GradientColor, GradientType } from '@/types/slides'
 
 withDefaults(defineProps<{
   id: string
   type: GradientType
-  color1: string
-  color2: string
+  colors: GradientColor[]
   rotate?: number
 }>(), {
   rotate: 0,

src/views/components/element/ShapeElement/index.vue

@@ -40,8 +40,7 @@
             <GradientDefs
               :id="`editabel-gradient-${elementInfo.id}`" 
               :type="elementInfo.gradient.type"
-              :color1="elementInfo.gradient.color[0]"
-              :color2="elementInfo.gradient.color[1]"
+              :colors="elementInfo.gradient.colors"
               :rotate="elementInfo.gradient.rotate"
             />
           </defs>