Access details of dynamically-created web content in Matlab's browser

Question

Kelly Kearney 2016-1-13

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/263705-access-details-of-dynamically-created-web-content-in-matlab-s-browser

回答： Kelly Kearney 2016-12-5

Is there any way to access the properties of dynamically-created objects (specifically, an SVG canvas created via a D3.js script) that are rendered on load in the Matlab browser? Perhaps some way to diving into the web browser handle returned by web?

I currently deal with this by passing the .html file in question through phantomJS (wait for render to finish and extract the svg element to a file), but I'm hoping to find a solution that doesn't require end users to install phantomJS themselves.

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Answer 1

Kelly Kearney 2016-12-5

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/263705-access-details-of-dynamically-created-web-content-in-matlab-s-browser#answer_246097

在 MATLAB Online 中打开

Tech support pointed me to the answer to this one. In newer releases of Matlab, the HtmlText property of a web browser handle is updated dynamically the displayed page is run. In my case, I had my javascript code add a specific div element to the page once it had completed its calculations. In Matlab, I could keep querying the html text every second or so, and look for the text of that div.

[stat, h] = web('index.html');
% Wait for the user to check the DONE box, then dump the html from the
% browser into a file
while ~checkstatus(h)
    pause(1);
end
txt = get(h, 'HtmlText');
close(h);
function isdone = checkstatus(h)
txt = get(h, 'HtmlText');
if isempty(txt)
    isdone = false;
else
    idx1 = strfind(txt, '<div id="textparams">');
    if isempty(idx1)
        isdone = false;
    else
        idx2 = strfind(txt, '</div>');
        idx2 = idx2(find(idx2 > idx1,1)) + 6;
        divtext = txt(idx1:idx2);
        isdone = ~isempty(strfind(divtext, 'DONE'));
    end
end