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Feature/overflow #94

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f4b9ee6
Adds overflow feature
pulimoodan Jan 17, 2024
963026b
Adds overflow input
pulimoodan Jan 17, 2024
35969c3
resolves affecting other shapes
pulimoodan Jan 17, 2024
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14 changes: 14 additions & 0 deletions src/canvas-txt/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ export interface CanvasTextConfig {
font?: string
lineHeight?: number
justify?: boolean
overflow?: boolean
}

const defaultConfig = {
Expand All @@ -29,6 +30,7 @@ const defaultConfig = {
font: 'Arial',
lineHeight: null,
justify: false,
overflow: true,
}

function drawText(
Expand Down Expand Up @@ -95,13 +97,25 @@ function drawText(
debugY = y + height / 2
txtY -= negOffset
}

ctx.save()

// clip the text to the width and height
if (!config.overflow) {
ctx.beginPath()
ctx.rect(x, y, width, height)
ctx.clip()
}

//print all lines of text
textArray.forEach((txtline) => {
txtline = txtline.trim()
ctx.fillText(txtline, textAnchor, txtY)
txtY += charHeight
})

ctx.restore()

if (config.debug) {
const debugColor = '#0C8CE9'

Expand Down
9 changes: 7 additions & 2 deletions src/docs/AppCanvas.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ const initialConfig = {
align: 'center',
vAlign: 'middle',
justify: false,
overflow: true,
min: 0,
max: 800,
}
Expand Down Expand Up @@ -68,6 +69,7 @@ function renderText() {
align: config.align as CanvasTextConfig['align'],
vAlign: config.vAlign as CanvasTextConfig['vAlign'],
justify: config.justify,
overflow: config.overflow,
}

const { height } = drawText(ctx, config.text, myConfig)
Expand Down Expand Up @@ -176,10 +178,13 @@ onMounted(() => {
<br />

<el-row>
<el-col :span="12">
<el-col :span="8">
<el-checkbox v-model="config.justify" label="Justify Text" />
</el-col>
<el-col :span="12">
<el-col :span="8">
<el-checkbox v-model="config.overflow" label="Text overflow" />
</el-col>
<el-col :span="8">
<el-checkbox v-model="config.debug" label="Debug mode" />
</el-col>
</el-row>
Expand Down