PNG_info_web.js

    //crc32与extrachunks与decode
    /* crc32.js (C) 2014-2015 SheetJS -- http://sheetjs.com */
        /* vim: set ts=2: */
        var CRC32;
        (function (factory) {
            if(typeof DO_NOT_EXPORT_CRC === 'undefined') {
                if('object' === typeof exports) {
                    factory(exports);
                } else if ('function' === typeof define && define.amd) {
                    define(function () {
                        var module = {};
                        factory(module);
                        return module;
                    });
                } else {
                    factory(CRC32 = {});
                }
            } else {
                factory(CRC32 = {});
            }
        }(function(CRC32) {
            CRC32.version = '0.3.0';
            /* see perf/crc32table.js */
            function signed_crc_table() {
                var c = 0, table = new Array(256);

                for(var n =0; n != 256; ++n){
                    c = n;
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
                    table[n] = c;
                }

                return typeof Int32Array !== 'undefined' ? new Int32Array(table) : table;
            }

            var table = signed_crc_table();
            /* charCodeAt is the best approach for binary strings */
            var use_buffer = typeof Buffer !== 'undefined';
            function crc32_bstr(bstr) {
                if(bstr.length > 32768) if(use_buffer) return crc32_buf_8(new Buffer(bstr));
                var crc = -1, L = bstr.length - 1;
                for(var i = 0; i < L;) {
                    crc =  table[(crc ^ bstr.charCodeAt(i++)) & 0xFF] ^ (crc >>> 8);
                    crc =  table[(crc ^ bstr.charCodeAt(i++)) & 0xFF] ^ (crc >>> 8);
                }
                if(i === L) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i)) & 0xFF];
                return crc ^ -1;
            }

            function crc32_buf(buf) {
                if(buf.length > 10000) return crc32_buf_8(buf);
                for(var crc = -1, i = 0, L=buf.length-3; i < L;) {
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                }
                while(i < L+3) crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                return crc ^ -1;
            }

            function crc32_buf_8(buf) {
                for(var crc = -1, i = 0, L=buf.length-7; i < L;) {
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                    crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                }
                while(i < L+7) crc = (crc >>> 8) ^ table[(crc^buf[i++])&0xFF];
                return crc ^ -1;
            }

            /* much much faster to intertwine utf8 and crc */
            function crc32_str(str) {
                for(var crc = -1, i = 0, L=str.length, c, d; i < L;) {
                    c = str.charCodeAt(i++);
                    if(c < 0x80) {
                        crc = (crc >>> 8) ^ table[(crc ^ c) & 0xFF];
                    } else if(c < 0x800) {
                        crc = (crc >>> 8) ^ table[(crc ^ (192|((c>>6)&31))) & 0xFF];
                        crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
                    } else if(c >= 0xD800 && c < 0xE000) {
                        c = (c&1023)+64; d = str.charCodeAt(i++) & 1023;
                        crc = (crc >>> 8) ^ table[(crc ^ (240|((c>>8)&7))) & 0xFF];
                        crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>2)&63))) & 0xFF];
                        crc = (crc >>> 8) ^ table[(crc ^ (128|((d>>6)&15)|(c&3))) & 0xFF];
                        crc = (crc >>> 8) ^ table[(crc ^ (128|(d&63))) & 0xFF];
                    } else {
                        crc = (crc >>> 8) ^ table[(crc ^ (224|((c>>12)&15))) & 0xFF];
                        crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>6)&63))) & 0xFF];
                        crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
                    }
                }
                return crc ^ -1;
            }
            CRC32.table = table;
            CRC32.bstr = crc32_bstr;
            CRC32.buf = crc32_buf;
            CRC32.str = crc32_str;
        }));
        /* crc32.js (C) 2014-2015 SheetJS -- http://sheetjs.com */
        /* vim: set ts=2: */
        // import crc32 from './crc32.js'

        // Used for fast-ish conversion between uint8s and uint32s/int32s.
        // Also required in order to remain agnostic for both Node Buffers and
        // Uint8Arrays.
        var uint8 = new Uint8Array(4)
        var int32 = new Int32Array(uint8.buffer)
        var uint32 = new Uint32Array(uint8.buffer)

        function extractChunks (data) {
            if (data[0] !== 0x89) throw new Error('Invalid .png file header')
            if (data[1] !== 0x50) throw new Error('Invalid .png file header')
            if (data[2] !== 0x4E) throw new Error('Invalid .png file header')
            if (data[3] !== 0x47) throw new Error('Invalid .png file header')
            if (data[4] !== 0x0D) throw new Error('Invalid .png file header: possibly caused by DOS-Unix line ending conversion?')
            if (data[5] !== 0x0A) throw new Error('Invalid .png file header: possibly caused by DOS-Unix line ending conversion?')
            if (data[6] !== 0x1A) throw new Error('Invalid .png file header')
            if (data[7] !== 0x0A) throw new Error('Invalid .png file header: possibly caused by DOS-Unix line ending conversion?')

            var ended = false
            var chunks = []
            var idx = 8

            while (idx < data.length) {
                // Read the length of the current chunk,
                // which is stored as a Uint32.
                uint8[3] = data[idx++]
                uint8[2] = data[idx++]
                uint8[1] = data[idx++]
                uint8[0] = data[idx++]

                // Chunk includes name/type for CRC check (see below).
                var length = uint32[0] + 4
                var chunk = new Uint8Array(length)
                chunk[0] = data[idx++]
                chunk[1] = data[idx++]
                chunk[2] = data[idx++]
                chunk[3] = data[idx++]

                // Get the name in ASCII for identification.
                var name = (
                    String.fromCharCode(chunk[0]) +
                    String.fromCharCode(chunk[1]) +
                    String.fromCharCode(chunk[2]) +
                    String.fromCharCode(chunk[3])
                )

                // The IHDR header MUST come first.
                if (!chunks.length && name !== 'IHDR') {
                    throw new Error('IHDR header missing')
                }

                // The IEND header marks the end of the file,
                // so on discovering it break out of the loop.
                if (name === 'IEND') {
                    ended = true
                    chunks.push({
                        name: name,
                        data: new Uint8Array(0)
                    })

                    break
                }

                // Read the contents of the chunk out of the main buffer.
                for (var i = 4; i < length; i++) {
                    chunk[i] = data[idx++]
                }

                // Read out the CRC value for comparison.
                // It's stored as an Int32.
                uint8[3] = data[idx++]
                uint8[2] = data[idx++]
                uint8[1] = data[idx++]
                uint8[0] = data[idx++]

                var crcActual = int32[0]
                var crcExpect = CRC32.buf(chunk)
                if (crcExpect !== crcActual) {
                    throw new Error(
                        'CRC values for ' + name + ' header do not match, PNG file is likely corrupted'
                    )
                }

                // The chunk data is now copied to remove the 4 preceding
                // bytes used for the chunk name/type.
                var chunkData = new Uint8Array(chunk.buffer.slice(4))

                chunks.push({
                    name: name,
                    data: chunkData
                })
            }

            if (!ended) {
                throw new Error('.png file ended prematurely: no IEND header was found')
            }

            return chunks
        }
        //decode
        function decode (data) {
        if (data.data && data.name) {
            data = data.data
        }

        var naming = true
        var text = ''
        var name = ''

        for (var i = 0; i < data.length; i++) {
            var code = data[i]

            if (naming) {
                if (code) {
                    name += String.fromCharCode(code)
                } else {
                    naming = false
                }
            } else {
                if (code) {
                    text += String.fromCharCode(code)
                } else {
                    throw new Error('Invalid NULL character found. 0x00 character is not permitted in tEXt content')
                }
            }
        }

        return {
            keyword: name,
            text: text
        }
    }




    const readNovelAITag = async (file) => {
            const buf = await file.arrayBuffer();
            let chunks = [];
            try {
                chunks = extractChunks(new Uint8Array(buf));
                console.log(chunks)
            } catch (err) {
                return chunks;
            }
            let textChunks = chunks
                .filter(function (chunk) {
                    return chunk.name === "tEXt" || chunk.name === "iTXt";
                })
            console.log(textChunks)
            textChunks=textChunks.map(function (chunk) {
                    if (chunk.name === "iTXt") {
                        let data = chunk.data.filter((x) => x != 0x0);
                        let txt = new TextDecoder().decode(data);
                        return {
                            keyword: "信息",
                            text: txt.slice(10),
                        };
                    }
                    return decode(chunk.data);
                });
            console.log(textChunks);
            return textChunks;
        }


    function convertImageToBlob(fileUrl) {
      return new Promise((resolve, reject) => {
        const xhr = new XMLHttpRequest();
        xhr.open('GET', fileUrl, true);
        xhr.responseType = 'blob';
        xhr.onload = function() {
          if (xhr.status === 200) {
            const blob = new Blob([xhr.response], { type: 'image/png' });
            resolve(blob);
          } else {
            reject(new Error('Failed to load image'));
          }
        };
        xhr.onerror = function() {
          reject(new Error('Failed to load image'));
        };
        xhr.send();
      });
    }

    async function convertDomImageToBlob(imageElement) {
      const imageUrl = imageElement.src;
      const blob = await convertImageToBlob(imageUrl);
      const file = new File([blob], 'filename.png', { type: blob.type });
      return file;
    }

        let delayPng_info=function(){
          return new Promise(resolve=>{
    const shadowRoot = document.querySelector('gradio-app')
    //             console.log(shadowRoot)
    const observer = new MutationObserver((mutations) => {
    console.log(4)
    mutations.forEach((mutation) => {
    // 如果 id 为 pnginfo_image 的子元素被添加到 gradio-app 元素中
    if (mutation.addedNodes.length && mutation.addedNodes[0].id === 'pnginfo_image') {
    console.log(mutation.addedNodes[0])
      // 取消监听
      observer.disconnect();
      // 获取 id 为 pnginfo_image 的元素并进行操作
      resolve(mutation.addedNodes[0])
    }
    });
    });
    observer.observe(shadowRoot, { childList: true ,subtree:true});
    })
    }

    async function png_info_edit() {
      console.log(123)
      const elem = document.querySelector('gradio-app');
      const shadowRoot = elem
      const png_info = await delayPng_info()
      png_info.addEventListener('change', (e) => {
      // 获取用户选择的文件
      // const file = png_info.files[0];
          setTimeout(async () => {
              const png_info_img = await png_info.querySelector('img')
              let png_info_img_convert = await convertDomImageToBlob(png_info_img)
              console.log(png_info_img_convert)
          let res=await readNovelAITag(png_info_img_convert)
              console.log('res',res)
              shadowRoot.querySelector('#component-677').innerText=res.length?res[0].text:'这不是一张stablediffusion图片'
                  
          //js对象形式转化
              const result = {};
              // const match = inputString.match(/(?<=prompt:)(.*)(?=Negative prompt:)/s)[0].trim();]
              console.log(res[0].text)
      result.prompt = res[0].text.match(/(.*)(?=Negative prompt:)/s)[0].trim();
      result.negativePrompt = res[0].text.match(/(?<=Negative prompt:)(.*)(?=Steps:)/s)[0].trim();
      let resArr=res[0].text.split(result.negativePrompt)[1].trim().split(',')
              console.log(resArr)
                              resArr.forEach(e=>{result[e.split(':')[0].replaceAll(' ','')]=
                      e.split(':')[1].trim()
              })
              console.log(result)
              console.log('result',result)

              const inputEvent = new Event('input');
              const changeEvent = new Event('change');
              const click = new Event('click');


              shadowRoot.querySelector('#txt2img_tab').onclick=()=>{
                  shadowRoot.querySelector('[class="tab-nav scroll-hide svelte-1g805jl"]').children[0].click()

                  shadowRoot.querySelectorAll('#setting_CLIP_stop_at_last_layers input')[0].value=Number(result.Clipskip)
                  shadowRoot.querySelectorAll('#setting_CLIP_stop_at_last_layers input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#setting_CLIP_stop_at_last_layers input')[1].value=Number(result.Clipskip)
                  shadowRoot.querySelectorAll('#setting_CLIP_stop_at_last_layers input')[1].dispatchEvent(inputEvent);

                  shadowRoot.querySelector('#txt2img_prompt textarea').value=result.prompt
                  shadowRoot.querySelector('#txt2img_prompt textarea').dispatchEvent(inputEvent);

                  shadowRoot.querySelector('#txt2img_neg_prompt textarea').value=result.negativePrompt
                  shadowRoot.querySelector('#txt2img_neg_prompt textarea').dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_steps input')[0].value=Number(result.Steps)
                  shadowRoot.querySelectorAll('#txt2img_steps input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_steps input')[1].value=Number(result.Steps)
                  shadowRoot.querySelectorAll('#txt2img_steps input')[1].dispatchEvent(inputEvent);

                  shadowRoot.querySelector(`[value="${result.Sampler}"]`).checked = true;
                  shadowRoot.querySelector(`[value="${result.Sampler}"]`).dispatchEvent(changeEvent);

                  shadowRoot.querySelectorAll('#txt2img_width input')[0].value=Number(result.Size.split('x')[0])
                  shadowRoot.querySelectorAll('#txt2img_width input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_width input')[1].value=Number(result.Size.split('x')[0])
                  shadowRoot.querySelectorAll('#txt2img_width input')[1].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_height input')[0].value=Number(result.Size.split('x')[1])
                  shadowRoot.querySelectorAll('#txt2img_height input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_height input')[1].value=Number(result.Size.split('x')[1])
                  shadowRoot.querySelectorAll('#txt2img_height input')[1].dispatchEvent(inputEvent);

                  shadowRoot.querySelector('#txt2img_seed input').value=Number(result.Seed)
                  shadowRoot.querySelector('#txt2img_seed input').dispatchEvent(inputEvent);

                  //高清修复
                  shadowRoot.querySelector('#txt2img_enable_hr input').checked = !!result.Hiresupscaler
                  shadowRoot.querySelector('#txt2img_enable_hr input').dispatchEvent(changeEvent)
                  
                  
                  if(!!result.Hiresupscaler){
                    const inputElement = document.querySelector("#txt2img_hr_upscaler > label > div > div.wrap-inner.svelte-a6vu2r > div > input");
const mousevent = new MouseEvent('mousedown', {
  view: window,
  bubbles: true,
  cancelable: true
});
inputElement.dispatchEvent(mousevent);
                    setTimeout(() => {
                        console.log(`[data-value="${result.Hiresupscaler}"]`)
                      shadowRoot.querySelector(`[data-value="${result.Hiresupscaler}"]`).click()
                    }, 3000);
                    }

                  // shadowRoot.querySelector('#txt2img_hr_upscaler .single-select').innerText = result.Hiresupscaler||'None'
                  // shadowRoot.querySelector('#txt2img_hr_upscaler .single-select').dispatchEvent(changeEvent)

                  shadowRoot.querySelectorAll('#txt2img_hires_steps input')[0].value=Number(result.Hiressteps)||0
                  shadowRoot.querySelectorAll('#txt2img_hires_steps input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_hires_steps input')[1].value=Number(result.Hiressteps)||0
                  shadowRoot.querySelectorAll('#txt2img_hires_steps input')[1].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_denoising_strength input')[0].value=Number(result.Denoisingstrength)||0
                  shadowRoot.querySelectorAll('#txt2img_denoising_strength input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_denoising_strength input')[1].value=Number(result.Denoisingstrength)||0
                  shadowRoot.querySelectorAll('#txt2img_denoising_strength input')[1].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_hr_scale input')[0].value=Number(result.Hiresupscale)||1
                  shadowRoot.querySelectorAll('#txt2img_hr_scale input')[0].dispatchEvent(inputEvent);

                  shadowRoot.querySelectorAll('#txt2img_hr_scale input')[1].value=Number(result.Hiresupscale)||1
                  shadowRoot.querySelectorAll('#txt2img_hr_scale input')[1].dispatchEvent(inputEvent);

              }
          },100)
  });
    }

    document.addEventListener('DOMContentLoaded', () => {
      png_info_edit()
  });