tdf#131416 Syntax diagrams

- Erase: syntax + new examples + x-refs
- Managing flow of control: Do, If, While diagrams

- Basic Syntax Diagrams (WiP) cheatsheet:
https://wiki.documentfoundation.org/User:LibreOfficiant/BasicSyntax

Change-Id: I68e03ccf8169d59e56f9a2e5b10b4bf09d8b217b
Reviewed-on: https://gerrit.libreoffice.org/c/help/+/93529
Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

8 files changed, 297 insertions, 23 deletions

diff --git a/source/media/helpimg/sbasic/Do-Loop_statement.svg b/source/media/helpimg/sbasic/Do-Loop_statement.svg
new file mode 100644
index 0000000000..5edd9d0409
--- /dev/null
+++ b/source/media/helpimg/sbasic/Do-Loop_statement.svg
@@ -0,0 +1,43 @@
+<svg class="railroad-diagram" height="124" viewBox="0 0 655.0 124" width="655.0" xmlns="http://www.w3.org/2000/svg">
+<g transform="translate(.5 .5)">
+<style>/* <![CDATA[ */
+    svg.railroad-diagram {
+        background-color:transparent;
+    }
+    svg.railroad-diagram path {
+        stroke-width:1;
+        stroke:black;
+        fill:rgba(0,0,0,0);
+    }
+    svg.railroad-diagram text {
+        font:bold 14px monospace;
+        font-family: Verdana, sans-serif;
+        text-anchor:middle;
+    }
+    svg.railroad-diagram text.label{
+        text-anchor:start;
+    }
+    svg.railroad-diagram text.comment{
+        font:italic 12px monospace;
+    }
+    svg.railroad-diagram rect{
+        stroke-width:1;
+        stroke:black;
+        fill:transparent;
+    }
+
+/* ]]> */
+</style><g>
+<path d="M20 41v20m10 -20v20m-10 -10h20"></path></g><path d="M40 51h10"></path><g class="terminal">
+<path d="M50 51h0.0"></path><path d="M87.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="37.0" x="50.0" y="40"></rect><text x="68.5" y="55">Do</text></g><path d="M87.0 51h10"></path><path d="M97.0 51h10"></path><g>
+<path d="M107.0 51h0.0"></path><path d="M242.0 51h0.0"></path><path d="M107.0 51h15"></path><g class="non-terminal">
+<path d="M122.0 51h0.0"></path><path d="M227.0 51h0.0"></path><rect height="22" width="105.0" x="122.0" y="40"></rect><text x="174.5" y="55">statements</text></g><path d="M227.0 51h15"></path><path d="M122.0 51a15 15 0 0 0 -15 15v12a15 15 0 0 0 15 15"></path><g class="terminal">
+<path d="M122.0 93h12.75"></path><path d="M214.25 93h12.75"></path><rect height="22" rx="10" ry="10" width="79.5" x="134.75" y="82"></rect><text x="174.5" y="97">Exit Do</text></g><path d="M227.0 93a15 15 0 0 0 15 -15v-12a15 15 0 0 0 -15 -15"></path></g><path d="M242.0 51h10"></path><path d="M252.0 51h10"></path><g class="terminal">
+<path d="M262.0 51h0.0"></path><path d="M316.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="54.0" x="262.0" y="40"></rect><text x="289.0" y="55">Loop</text></g><path d="M316.0 51h10"></path><g>
+<path d="M326.0 51h0.0"></path><path d="M615.0 51h0.0"></path><path d="M326.0 51a15 15 0 0 0 15 -15v-1a15 15 0 0 1 15 -15"></path><g>
+<path d="M356.0 20h229.0"></path></g><path d="M585.0 20a15 15 0 0 1 15 15v1a15 15 0 0 0 15 15"></path><path d="M326.0 51h30"></path><g>
+<path d="M356.0 51h0.0"></path><path d="M585.0 51h0.0"></path><g>
+<path d="M356.0 51h0.0"></path><path d="M478.5 51h0.0"></path><path d="M356.0 51h30"></path><g class="terminal">
+<path d="M386.0 51h0.0"></path><path d="M448.5 51h0.0"></path><rect height="22" rx="10" ry="10" width="62.5" x="386.0" y="40"></rect><text x="417.25" y="55">While</text></g><path d="M448.5 51h30"></path><path d="M356.0 51a15 15 0 0 1 15 15v12a15 15 0 0 0 15 15"></path><g class="terminal">
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+<path d="M488.5 51h0.0"></path><path d="M585.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="96.5" x="488.5" y="40"></rect><text x="536.75" y="55">condition</text></g></g><path d="M585.0 51h30"></path></g><path d="M 615.0 51 h 20 m -10 -10 v 20 m 10 -20 v 20"></path></g></svg>
\ No newline at end of file
diff --git a/source/media/helpimg/sbasic/Do_statement.svg b/source/media/helpimg/sbasic/Do_statement.svg
new file mode 100644
index 0000000000..50613af939
--- /dev/null
+++ b/source/media/helpimg/sbasic/Do_statement.svg
@@ -0,0 +1,43 @@
+<svg class="railroad-diagram" height="124" viewBox="0 0 655.0 124" width="655.0" xmlns="http://www.w3.org/2000/svg">
+<g transform="translate(.5 .5)">
+<style>/* <![CDATA[ */
+    svg.railroad-diagram {
+        background-color:transparent;
+    }
+    svg.railroad-diagram path {
+        stroke-width:1;
+        stroke:black;
+        fill:rgba(0,0,0,0);
+    }
+    svg.railroad-diagram text {
+        font:bold 14px monospace;
+        font-family: Verdana, sans-serif;
+        text-anchor:middle;
+    }
+    svg.railroad-diagram text.label{
+        text-anchor:start;
+    }
+    svg.railroad-diagram text.comment{
+        font:italic 12px monospace;
+    }
+    svg.railroad-diagram rect{
+        stroke-width:1;
+        stroke:black;
+        fill:transparent;
+    }
+
+/* ]]> */
+</style><g>
+<path d="M20 41v20m10 -20v20m-10 -10h20"></path></g><path d="M40 51h10"></path><g class="terminal">
+<path d="M50 51h0.0"></path><path d="M87.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="37.0" x="50.0" y="40"></rect><text x="68.5" y="55">Do</text></g><path d="M87.0 51h10"></path><g>
+<path d="M97.0 51h0.0"></path><path d="M386.0 51h0.0"></path><path d="M97.0 51a15 15 0 0 0 15 -15v-1a15 15 0 0 1 15 -15"></path><g>
+<path d="M127.0 20h229.0"></path></g><path d="M356.0 20a15 15 0 0 1 15 15v1a15 15 0 0 0 15 15"></path><path d="M97.0 51h30"></path><g>
+<path d="M127.0 51h0.0"></path><path d="M356.0 51h0.0"></path><g>
+<path d="M127.0 51h0.0"></path><path d="M249.5 51h0.0"></path><path d="M127.0 51h30"></path><g class="terminal">
+<path d="M157.0 51h0.0"></path><path d="M219.5 51h0.0"></path><rect height="22" rx="10" ry="10" width="62.5" x="157.0" y="40"></rect><text x="188.25" y="55">While</text></g><path d="M219.5 51h30"></path><path d="M127.0 51a15 15 0 0 1 15 15v12a15 15 0 0 0 15 15"></path><g class="terminal">
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+<path d="M259.5 51h0.0"></path><path d="M356.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="96.5" x="259.5" y="40"></rect><text x="307.75" y="55">condition</text></g></g><path d="M356.0 51h30"></path></g><path d="M386.0 51h10"></path><g>
+<path d="M396.0 51h0.0"></path><path d="M531.0 51h0.0"></path><path d="M396.0 51h15"></path><g class="non-terminal">
+<path d="M411.0 51h0.0"></path><path d="M516.0 51h0.0"></path><rect height="22" width="105.0" x="411.0" y="40"></rect><text x="463.5" y="55">statements</text></g><path d="M516.0 51h15"></path><path d="M411.0 51a15 15 0 0 0 -15 15v12a15 15 0 0 0 15 15"></path><g class="terminal">
+<path d="M411.0 93h12.75"></path><path d="M503.25 93h12.75"></path><rect height="22" rx="10" ry="10" width="79.5" x="423.75" y="82"></rect><text x="463.5" y="97">Exit Do</text></g><path d="M516.0 93a15 15 0 0 0 15 -15v-12a15 15 0 0 0 -15 -15"></path></g><path d="M531.0 51h10"></path><path d="M541.0 51h10"></path><g class="terminal">
+<path d="M551.0 51h0.0"></path><path d="M605.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="54.0" x="551.0" y="40"></rect><text x="578.0" y="55">Loop</text></g><path d="M605.0 51h10"></path><path d="M 615.0 51 h 20 m -10 -10 v 20 m 10 -20 v 20"></path></g></svg>
\ No newline at end of file
diff --git a/source/media/helpimg/sbasic/ElseIf_fragment.svg b/source/media/helpimg/sbasic/ElseIf_fragment.svg
new file mode 100644
index 0000000000..b423bc7fb0
--- /dev/null
+++ b/source/media/helpimg/sbasic/ElseIf_fragment.svg
@@ -0,0 +1,40 @@
+<svg class="railroad-diagram" height="102" viewBox="0 0 556.5 102" width="556.5" xmlns="http://www.w3.org/2000/svg">
+<g transform="translate(.5 .5)">
+<style>/* <![CDATA[ */
+    svg.railroad-diagram {
+        background-color:transparent;
+    }
+    svg.railroad-diagram path {
+        stroke-width:1;
+        stroke:black;
+        fill:rgba(0,0,0,0);
+    }
+    svg.railroad-diagram text {
+        font:bold 14px monospace;
+        font-family: Verdana, sans-serif;
+        text-anchor:middle;
+    }
+    svg.railroad-diagram text.label{
+        text-anchor:start;
+    }
+    svg.railroad-diagram text.comment{
+        font:italic 12px monospace;
+    }
+    svg.railroad-diagram rect{
+        stroke-width:1;
+        stroke:black;
+        fill:transparent;
+    }
+
+/* ]]> */
+</style><g>
+<path d="M20 41v20m0 -10h20"></path></g><g>
+<path d="M40 51h0.0"></path><path d="M516.5 51h0.0"></path><path d="M40.0 51a15 15 0 0 0 15 -15v-1a15 15 0 0 1 15 -15"></path><g>
+<path d="M70.0 20h416.5"></path></g><path d="M486.5 20a15 15 0 0 1 15 15v1a15 15 0 0 0 15 15"></path><path d="M40.0 51h30"></path><g>
+<path d="M70.0 51h0.0"></path><path d="M486.5 51h0.0"></path><path d="M70.0 51h15"></path><g>
+<path d="M85.0 51h0.0"></path><path d="M471.5 51h0.0"></path><g class="terminal">
+<path d="M85.0 51h0.0"></path><path d="M156.0 51h0.0"></path><rect height="22" rx="10" ry="10" width="71.0" x="85.0" y="40"></rect><text x="120.5" y="55">ElseIf</text></g><path d="M156.0 51h10"></path><path d="M166.0 51h10"></path><g class="terminal">
+<path d="M176.0 51h0.0"></path><path d="M272.5 51h0.0"></path><rect height="22" rx="10" ry="10" width="96.5" x="176.0" y="40"></rect><text x="224.25" y="55">condition</text></g><path d="M272.5 51h10"></path><path d="M282.5 51h10"></path><g class="terminal">
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+<path d="M366.5 51h0.0"></path><path d="M471.5 51h0.0"></path><rect height="22" rx="10" ry="10" width="105.0" x="366.5" y="40"></rect><text x="419.0" y="55">statements</text></g></g><path d="M471.5 51h15"></path><path d="M85.0 51a15 15 0 0 0 -15 15v1a15 15 0 0 0 15 15"></path><g>
+<path d="M85.0 82h386.5"></path></g><path d="M471.5 82a15 15 0 0 0 15 -15v-1a15 15 0 0 0 -15 -15"></path></g><path d="M486.5 51h30"></path></g><path d="M 516.5 51 h 20 m 0 -10 v 20"></path></g></svg>
\ No newline at end of file
diff --git a/source/media/helpimg/sbasic/Else_fragment.svg b/source/media/helpimg/sbasic/Else_fragment.svg
new file mode 100644
index 0000000000..beee1d4781
--- /dev/null
+++ b/source/media/helpimg/sbasic/Else_fragment.svg
@@ -0,0 +1,38 @@
+<svg class="railroad-diagram" height="92" viewBox="0 0 509.5 92" width="509.5" xmlns="http://www.w3.org/2000/svg">
+<g transform="translate(.5 .5)">
+<style>/* <![CDATA[ */
+    svg.railroad-diagram {
+        background-color:transparent;
+    }
+    svg.railroad-diagram path {
+        stroke-width:1;
+        stroke:black;
+        fill:rgba(0,0,0,0);
+    }
+    svg.railroad-diagram text {
+        font:bold 14px monospace;
+        font-family: Verdana, sans-serif;
+        text-anchor:middle;
+    }
+    svg.railroad-diagram text.label{
+        text-anchor:start;
+    }
+    svg.railroad-diagram text.comment{
+        font:italic 12px monospace;
+    }
+    svg.railroad-diagram rect{
+        stroke-width:1;
+        stroke:black;
+        fill:transparent;
+    }
+
+/* ]]> */
+</style><g>
+<path d="M20 20v20m0 -10h20"></path></g><g>
+<path d="M40 30h0.0"></path><path d="M469.5 30h0.0"></path><path d="M40.0 30h30"></path><g>
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+<path d="M70.0 61h0.0"></path><path d="M439.5 61h0.0"></path><g class="terminal">
+<path d="M70.0 61h0.0"></path><path d="M124.0 61h0.0"></path><rect height="22" rx="10" ry="10" width="54.0" x="70.0" y="50"></rect><text x="97.0" y="65">Else</text></g><path d="M124.0 61h10"></path><path d="M134.0 61h10"></path><g class="terminal">
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\ No newline at end of file
diff --git a/source/media/helpimg/sbasic/Erase_statement.svg b/source/media/helpimg/sbasic/Erase_statement.svg
new file mode 100644
index 0000000000..dcd9a671a4
--- /dev/null
+++ b/source/media/helpimg/sbasic/Erase_statement.svg
@@ -0,0 +1,37 @@
+<svg class="railroad-diagram" height="124" viewBox="0 0 349.0 124" width="349.0" xmlns="http://www.w3.org/2000/svg">
+<g transform="translate(.5 .5)">
+<style>/* <![CDATA[ */
+    svg.railroad-diagram {
+        background-color:transparent;
+    }
+    svg.railroad-diagram path {
+        stroke-width:1;
+        stroke:black;
+        fill:rgba(0,0,0,0);
+    }
+    svg.railroad-diagram text {
+        font:bold 14px monospace;
+        font-family: Verdana, sans-serif;
+        text-anchor:middle;
+    }
+    svg.railroad-diagram text.label{
+        text-anchor:start;
+    }
+    svg.railroad-diagram text.comment{
+        font:italic 12px monospace;
+    }
+    svg.railroad-diagram rect{
+        stroke-width:1;
+        stroke:black;
+        fill:transparent;
+    }
+
+/* ]]> */
+</style><g>
+<path d="M20 41v20m10 -20v20m-10 -10h20"></path></g><path d="M40 51h10"></path><g class="terminal">
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+<path d="M122.5 51h0.0"></path><path d="M309.0 51h0.0"></path><path d="M122.5 51a15 15 0 0 0 15 -15v-1a15 15 0 0 1 15 -15"></path><g>
+<path d="M152.5 20h126.5"></path></g><path d="M279.0 20a15 15 0 0 1 15 15v1a15 15 0 0 0 15 15"></path><path d="M122.5 51h30"></path><g>
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diff --git a/source/media/helpimg/sbasic/If_statement.svg b/source/media/helpimg/sbasic/If_statement.svg
new file mode 100644
index 0000000000..2717455dc3
--- /dev/null
+++ b/source/media/helpimg/sbasic/If_statement.svg
@@ -0,0 +1,39 @@
+<svg class="railroad-diagram" height="93" viewBox="0 0 725.5 93" width="725.5" xmlns="http://www.w3.org/2000/svg">
+<g transform="translate(.5 .5)">
+<style>/* <![CDATA[ */
+    svg.railroad-diagram {
+        background-color:transparent;
+    }
+    svg.railroad-diagram path {
+        stroke-width:1;
+        stroke:black;
+        fill:rgba(0,0,0,0);
+    }
+    svg.railroad-diagram text {
+        font:bold 14px monospace;
+        font-family: Verdana, sans-serif;
+        text-anchor:middle;
+    }
+    svg.railroad-diagram text.label{
+        text-anchor:start;
+    }
+    svg.railroad-diagram text.comment{
+        font:italic 12px monospace;
+    }
+    svg.railroad-diagram rect{
+        stroke-width:1;
+        stroke:black;
+        fill:transparent;
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+
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