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2018-06-11Use spans in CJS_Object.Tom Sepez
Avoid explicitly having to count items in arrays. Change-Id: I24a91db45e8a8530f38afcc273e824ffb70a6cb9 Reviewed-on: https://pdfium-review.googlesource.com/34710 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-06-08Remove CJS_Object::InitInstance().Tom Sepez
Because constructors can do all this. Change-Id: I4f7ff6c26b17d9bddd326333a66e1bd38b2ea377 Reviewed-on: https://pdfium-review.googlesource.com/34693 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-08Ensure CJS_Return() with error always includes a message.Tom Sepez
Change the signature of the constructors to make it impossible to do this otherwise. Change-Id: I14e88d98a1128f2d599459ce9337cd6d079469fe Reviewed-on: https://pdfium-review.googlesource.com/34531 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-08Fix issue with resolveNodes() not found off global proxy object.Tom Sepez
We used to assume that a global proxy object could be distinguished by it not having two internal fields, but that invariant isn't correct. Instead, flag it as such so the block of code at line 126 will check the prototype to find an actual object. Squeeze some bytes out of the tags while were at it, no reason for them to be wide. Also remove GetGlobalObjectFromContext() helper, for transparency into what's really going on in v8. This then shows a needless retrieval of an object we already have in one case. Bug: pdfium:1097 Change-Id: Iafc356373166fe5fda76ea7d64193826ee69a6c3 Reviewed-on: https://pdfium-review.googlesource.com/34630 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-08Update fxjs/README now that context data slots are goneTom Sepez
TBR=dsinclair@chromium.org Change-Id: I2665f616d451ff7075b63457a91ef264bbde84c9 Reviewed-on: https://pdfium-review.googlesource.com/34610 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-07Remove friending in CFXJSE_Context.Tom Sepez
Change-Id: I6a634cb3fb9acdd78ae29017987e5e41865a0d4b Reviewed-on: https://pdfium-review.googlesource.com/34490 Commit-Queue: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-07Remove v8::Context slot usage entierly from fxjsTom Sepez
Its no longer required. Change-Id: I180ca99817352a91b6d9d7c9b45985cd96dc730e Reviewed-on: https://pdfium-review.googlesource.com/34290 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-07Simplify cfxjs_engine_embeddertest.cppTom Sepez
In a world without context slots, we don't need to test getting an engine from a content slot. Change-Id: If572c364d663d1f20af659392bda3b96348fd4d4 Reviewed-on: https://pdfium-review.googlesource.com/34270 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-06Remove still more v8::Context slot usage.chromium/3452Tom Sepez
Removes CJS_Runtime::RuntimeFromIsolateCurrentContext() Change-Id: I51abcf32aaafac522e1595edf663507c26781357 Reviewed-on: https://pdfium-review.googlesource.com/34230 Commit-Queue: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-06Get global consts without use of v8::Context slotTom Sepez
Another step in the move away from v8::Context slots. Change-Id: I302d1b3305755088c663214120e582b783cc5fbb Reviewed-on: https://pdfium-review.googlesource.com/34211 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-06Stop using some v8::Context slot to find runtime.Tom Sepez
Instead, use the object binding's pointer. Puts the cart back behind the horse. Change-Id: I4c06ae991b871c6e90b0e6c70b69886addca2354 Reviewed-on: https://pdfium-review.googlesource.com/33630 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-06[xfa] Make class error description betterDan Sinclair
This CL changes the JS error produced by the CFXJSE_Class when a method call returns with error. Instead of outputing something like: JS Error: resolveNode.: we will now get: JS Error: Root.resolveNode: which at least lets us know we're looking at the Root class. Bug: pdfium:1097 Change-Id: I4982109398e290d9ebc2763fcc2421a642c581a5 Reviewed-on: https://pdfium-review.googlesource.com/34090 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-06Better error reporting on XFA JS errorsTom Sepez
Change-Id: I773ff83b45ffbd736f064daedb1010c8d01a99d5 Reviewed-on: https://pdfium-review.googlesource.com/34050 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-05Introduce IJS_Runtime::ScopedEventContext helper class.chromium/3451Tom Sepez
This proves that m_EventContextArray is, in fact, a stack. Tidy one function by using AutoRestorer while at it. Change-Id: I319538b4eadcd9ce83319aa73861635dd5eb8c36 Reviewed-on: https://pdfium-review.googlesource.com/33970 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-05Tidy parser lifecycle state machine in CPDF_PageObjectHolder.Tom Sepez
Only update state in CPDF_PageObjectHolder itself. Make more data private. Remove CPDF_Page::GetPageBBox() as exact duplicate of CPDF_PageObjectHolder::GetBBox(). Change-Id: I083ec33f61a1490e7a5e673c9787751af15a6cd1 Reviewed-on: https://pdfium-review.googlesource.com/33810 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-05[xfa] Make the event context available when calling back in XFADan Sinclair
When calling into the XFA JS engine with a request for a non-XFA JS call which accesses the EventContext we would get a crash in XFA as we never set the context. This CL changes the XFA code to accept the CJS_Runtime instead of the CFXJS_Engine and then calls NewEventContext before executing JS scripts. This will correctly setup the event context as needed for any JS callbacks. Bug: pdfium:1003 Change-Id: Icf202252b2e6e56afdf0d1766a32a893935a2fd3 Reviewed-on: https://pdfium-review.googlesource.com/33930 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-06-04Lowercase JS_Define.{h,cpp} and CJS_Define.hTom Sepez
Consistency with file naming conventions. No functional change. Change-Id: I596c4be5bbf0510950c44a7d9d80f59537739c3b Reviewed-on: https://pdfium-review.googlesource.com/33593 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2018-06-04Make CJS_Objects track CJS_Runtime (and hence the document itself)Tom Sepez
Precursor to removing some more v8::Context slot dependency. There's a cost to maintaining the set of observers, but since these objects are tied to V8 lifetimes, not C++ lifetimes, we want to be very wary of the document going away unexpectedly. Change-Id: I579f58a460aa50b88cb861227c9aca9a8a83ce12 Reviewed-on: https://pdfium-review.googlesource.com/33471 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-04cjs_globalconsts.cpp need not use v8::Context slotsTom Sepez
Small step towards deprecating FXJS's use of v8::Context slots. Reduces some string constant storage size while were at it by avoiding wide literals for ascii strings. Change-Id: Ibc651cff264302681645fde7c53bf77517b97651 Reviewed-on: https://pdfium-review.googlesource.com/33470 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-06-04Revert "Make CPDF_Document cache CPDF_Pages"Tom Sepez
This reverts commit f0d9d28a034fe3650c3c2d662090c1e8687ddb16. Reason for revert: avoid parsing page. Change-Id: Id3478f7e38f1cbe95d098e00158b1d7d9dc6f76e Reviewed-on: https://pdfium-review.googlesource.com/33750 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-04Revert "Make common page base class for XFA and non-XFA."Tom Sepez
This reverts commit d06cc38b76685b002c51b227ae43b8314d926ad8. Reason for revert: blocking previous revert Change-Id: I74f8b80852c671440cca5fabef30e69cde9e2063 Reviewed-on: https://pdfium-review.googlesource.com/33713 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-06-04[xfa] Get properties from the non-xfa global if possibleDan Sinclair
When script variables are used the methods are set on the non-xfa global object. This CL updates the NormalPropertyGetter to check the non-xfa global object for methods which allows the variables methods to be found. Bug: pdfium:1097 Change-Id: I13d9d49ad654cad776883aef74de6250de5e756b Reviewed-on: https://pdfium-review.googlesource.com/33433 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-06-01Fix XFA guardsRyan Harrison
These guards are using #if, when they should be using #ifdef. Caught using Clang's static analyzer. Change-Id: I86e99c5e4142cf84fff5f2365ad534f09ae40511 Reviewed-on: https://pdfium-review.googlesource.com/33510 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2018-05-31Update fxjs READMETom Sepez
TBR=dsinclair@chromium.org Change-Id: I6f2a4a4b39c38a1bcfcf817a5c2aa51414291ad9 Reviewed-on: https://pdfium-review.googlesource.com/33451 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-05-31Make FXJSE variable context compatible with FXJS.Tom Sepez
Allows FXJS to be entered directly from V8 when the variable context gets a reference to an FXJS object. Bug: pdfium:1066 Change-Id: I48e39ed9104cc6df31c19d94fa7e0f8c7760932f Reviewed-on: https://pdfium-review.googlesource.com/33450 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-05-31[xfa] Remove unused methods from CFXJSE_ScopeUtil_IsolateHandleContextDan Sinclair
Methods are not called, removed. Bug: pdfium:1097 Change-Id: I0c7bc8ded070002dd5eb980a4705eabb829fb6ec Reviewed-on: https://pdfium-review.googlesource.com/33390 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-30Make common page base class for XFA and non-XFA.Tom Sepez
Now that both are ref-counted, we can replace ifdef's with some polymorphism. Bug: pdfium:760 Change-Id: Ie22ea259c9af56fa569f0af268b8e7065789a3f2 Reviewed-on: https://pdfium-review.googlesource.com/32892 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-05-30[xfa] Dump JS errors to console in debug modechromium/3446Dan Sinclair
This CL writes any JS exceptions to the console in XFA if running in Debug mode. This makes it possible to see when an error happens in JS execution. Bug: pdfium:1097 Change-Id: Ida14050328c5e6e85ab2704bb5dddfec370dddf1 Reviewed-on: https://pdfium-review.googlesource.com/33154 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-30Make CPDF_Document cache CPDF_PagesTom Sepez
We cache pages not by page number, which can bounce around as pages are inserted or removed, but by page dictionary's object number. Since the page may be created under one function and used under another, we can't take the shortcut of not instantiating a render cache nor not parsing the page. Change-Id: I9a325cda8b3141153544ac53e78a51a44e6b411a Reviewed-on: https://pdfium-review.googlesource.com/32830 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-05-29[xfa] Propagate the xfa change data for text to JS and back.Dan Sinclair
This CL adds the necessary plumbing to propagate the change information for a text widget from FWL out to JS and handle the returned value as necessary. Bug: pdfium:1066 Change-Id: I78fd81761b90294f1836e9f09dba12ed238963cc Reviewed-on: https://pdfium-review.googlesource.com/33070 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-05-25Make CPDF_Page retainable.Tom Sepez
Small step to reducing the differences between XFA and non-XFA. We still use the RetainPtr pretty much as if it were an unique_ptr, in that we're not yet caching pages and handing out multiple pointers to the same page in the non-XFA case. The one change is in page view cleanup, where we no longer need a boolean and can take (sufficient) page ownership with a RetainPtr. Tidy up some document.h -> page.h -> document.h circular inclusion while we're at it. NOTE: Wait for imminent branch to pass before landing. We'll want this to bake a while. Change-Id: I64a2f12ac3424ece1063d40583995b834117cf34 Reviewed-on: https://pdfium-review.googlesource.com/32790 Reviewed-by: dsinclair <dsinclair@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-05-25[xfa] Generate CXFA_EventParam.newText dynamicallyDan Sinclair
When an xfa.event is sent it is possible to change the selStart, selEnd and change values of the event. This should cause the value of newText to be changed as needed. This CL removes m_wsNewText from CXFA_EventParam and instead generates the new text based on the previous text, the selection and the change. Bug: 1066 Change-Id: I35d126fad9771c8980654a8af64d2b98989bff3f Reviewed-on: https://pdfium-review.googlesource.com/32970 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-25[xfa] Add missing xfa.event.cancelAction propertyDan Sinclair
This CL adds the missing cancleAction property from the xfa.event object. Bug: 1066 Change-Id: I7d38956e2985c1f6ac0eba6de090874f1f72003c Reviewed-on: https://pdfium-review.googlesource.com/32950 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-25[xfa] Clamp selStart, selEnd values in CJX_EventPseudoModelDan Sinclair
This CL adds bounds checking for the selStart and selEnd settings of the event object. The selEnd is not allowed to be less then selStart. They are also not allowed to be negative. This also clamps them to the length of the prevText string. Bug: 1066 Change-Id: Ifc9113c669c83a4a97655554affbbce30c2bfc64 Reviewed-on: https://pdfium-review.googlesource.com/32933 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-25[xfa] Restrict the editable xfa.change propertiesDan Sinclair
According to the XFA Spec only the cancelAction, selStart, selEnd and change properties of xfa.event are editable. This CL adds checking to early out if attempting to set any of the other properties. Bug: 1066 Change-Id: Ie6129e1f65de7584f0b5f3072a1acf6e25d44a2c Reviewed-on: https://pdfium-review.googlesource.com/32932 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-25[xfa] Rename pValue to pReturn for clarityDan Sinclair
This CL renames the pValue parameters to the CJX_EventPseudoModel Property helpers. This makes it a little clearer that the thing we're setting is _not_ pValue but wsValue. Bug: 1066 Change-Id: I1f468659c4e241059da0bbe43c461be788cd62a0 Reviewed-on: https://pdfium-review.googlesource.com/32931 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-25[xfa] Allow accessing the event changed parameter from JS.Dan Sinclair
This CL updates the CFXJSE_Engine code to access the defined properties of a class if we fail to find the property in any other way. This fixes up an issue where we were unable to read the 'change' property of the CJX_EventPseudoModel because we could not find the 'change' property. Bug: 1066 Change-Id: I4ad205bc527beeca1c3e24a36cdde0c21287d9fb Reviewed-on: https://pdfium-review.googlesource.com/32930 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-25Add code to display XFA JS log messagesDan Sinclair
This CL adds a bit of commented out code to CJX_LogPseudoModel to dump any xfa.log.message() commands to the terminal. It's commented out as we don't want it running normally but we can enable as needed. Change-Id: Ia53759253391cbaa249a1801aa1541213020ad68 Reviewed-on: https://pdfium-review.googlesource.com/32915 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-05-22Fix nits in fxjs.Lei Zhang
- Make parameter checking more consistent in a several places. - Remove unnecessary parameter size checks. - Get rid of new statements / FX_Free() calls. Change-Id: I7bac8e678f590815a398a318cd62a2947e1dd973 Reviewed-on: https://pdfium-review.googlesource.com/32836 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-05-17Convert JS execute methods to return Optional<IJS_Runtime::JS_Error>Dan Sinclair
This CL changes several of the JS execution methods to to return an Optional<IJS_Runtime::JS_Error> instead of a bool with a WideString out param. The IJS_Runtime::JS_Error will contain the line, column and exception message if an error occurs during execution. Change-Id: I37785ae6cd133a4c94ad8d25289473600b8a5d19 Reviewed-on: https://pdfium-review.googlesource.com/32614 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2018-05-17Update third_party/base/compiler_specific.h.Lei Zhang
Import Chromium's base/compiler_specific.h from r537069. Now that FALLTHROUGH is available via compiler_specific.h, remove FX_FALLTHROUGH. Change-Id: I8b9631a4f007673e10e0c26951dfd61e9dcada30 Reviewed-on: https://pdfium-review.googlesource.com/32639 Reviewed-by: Nico Weber <thakis@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2018-05-16Remove two unused #defines in cjs_globaldata.cpp.Tom Sepez
Bug: pdfium:1085 Change-Id: I121152527333e143d23e7cb852c8c1a745026453 Reviewed-on: https://pdfium-review.googlesource.com/32618 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-05-16Convert CJX_Object::Set* methods to return voidDan Sinclair
We never use the return values of these methods, switch to void from bool. Change-Id: I8b0d96e5be90ac08281bbb82d2c7205d94abea2b Reviewed-on: https://pdfium-review.googlesource.com/32616 Reviewed-by: Tom Sepez <tsepez@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-05-16Convert Formcalc ToJavascript to a pointer WideTextBufDan Sinclair
This CL converts the WidetextBuf reference to a pointer in the formcalc ToJavaScript methods. Change-Id: Ia05c7255a99a2eaa3d9a57f77580969896ad90a0 Reviewed-on: https://pdfium-review.googlesource.com/32612 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-05-10Cleanup formcalc method generationchromium/3427Dan Sinclair
This CL simplifies the FormCalc method call generation when converted to JavaScript. Currently we output the same chunk of code to run the given method on an array or object per method call. This CL pulls out the common execution code to a pfm_method_runner function which is used instead. An embedder test has been added to verify that method invocation from formcalc works correctly. Bug: chromium:814848 Change-Id: I1ec052eab051053fedcb464d57e0e15228b8c5a2 Reviewed-on: https://pdfium-review.googlesource.com/32372 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-05-08Rename CPDF_Document::GetPage() to GetPageDictionary().Tom Sepez
Avoids a conflict should we wish to have the document actually track pages, with a GetPage() that returns CPDF_Page. Do the same thing to CPDF_DataAvail along the way. Add some missing consts as well. Change-Id: I2cb2213cc4c0649662fceab80407ee4a3f4cf30e Reviewed-on: https://pdfium-review.googlesource.com/32158 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-05-07Mark parts of CJS_EventHandler as private.Lei Zhang
Also change Initial() to Initialize(). Change-Id: Ic63ee1cace0012ad570db25447ced752bddd7f86 Reviewed-on: https://pdfium-review.googlesource.com/28150 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-05-02Add a CFX_XMLDocument class.Dan Sinclair
This CL adds a CFX_XMLDocument to act as the XML node container. All nodes are now owned by the document and the document is returned by the CFX_XMLParser. Classes which parse XML files now store the document instead of the root node. BUG: chromium:835636 Change-Id: I1e07d6115cf14714911d6fd4c3fa920c94fd5faf Reviewed-on: https://pdfium-review.googlesource.com/31313 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-04-30Make CPDFSDK_FormFillEnvironment always hold a CPDF_Document.Tom Sepez
Small step towards removing UnderlyingDocumentType and making FPDF documents always be CPDF documents, regardless of XFA. This improves layering a bit in the process. Change-Id: Ice5ed7ba1ffdd7edfc9c4719f0e3a9cfb22f5790 Reviewed-on: https://pdfium-review.googlesource.com/31672 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-04-27Remove argument from CPDFSDK_FormFillEnvironment::GetCurrentPageTom Sepez
Small tidying. The form fill environment is 1:1 with documents, and already knows its underlying document. The callers all first obtain this from the FFE and then pass it back into it. Change-Id: I33835c1dc847ca67f2cc633c87af2f6e003ef58a Reviewed-on: https://pdfium-review.googlesource.com/31591 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
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